最新刊期
卷 40 ， 期 12 ， 2020
- 摘要：The Nb44Ti28Ni28-xFex（x=0, 5, 10, 15） ingots were prepared by the non-consumable vacuum arc melting. The microstructure of the ingot was analyzed by the scanning electron microscope（SEM-Quanta 200 FEG） and X-ray diffraction analysis. The results reveal that microstructure of Nb44Ti28Ni28-xFex alloys is composed of the primary phases and eutectics when x≤10, while the NbFe phases are precipitated in the subeutectic structure when x>10. The hydrogen solubility, hydrogen permeability and hydrogen diffusion of Nb44Ti28Ni28-xFex（x=0, 5, 10） alloys were systematically investigated. The results indicate that the hydrogen solubility of alloys is slightly decreased with the increase of Fe content, while the permeability is increased at first and then decreased. The Nb44Ti28Ni23Fe5 alloy exhibits the optimal hydrogen permeability at temperatures above 523 K, and it is 1.5 times higher than that of Nb44Ti28Ni28 alloy at 673 K, which mainly benefits from the substantially increase of intrinsic hydrogen diffusion coefficient.关键词：Nb-Ti-Ni（Fe） Hydrogen Permeable Alloys;Microstructure;Hydrogen Solubility;Hydrogen Permeability;Hydrogen Diffusion Coefficient
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发布时间：2023-12-18 - 摘要：High-entropy alloys（HEAs） have aroused extensive attention because of the excellent mechanical properties, heat resistance and corrosion resistance. Arc smelting,as the main process in the traditional preparation, has the problems such as single shape, limited size and easy segregation, which limits the theoretical research and industrial manufacturing applications of high-entropy alloys. However, the additive manufacturing technology can realize the rapid melting and solidification of high-entropy alloys with complex structure and larger sizes by the input of high energy density. The research on the preparation of high-entropy alloys by additive manufacturing technology in recent years was reviewed in detail, focusing on the structural evolution, heat resistance, corrosion resistance, mechanical properties and composition design of high-entropy alloys by additive manufacturing technology at home and abroad. The research progress in additive manufacturing high-entropy alloy in recent years and the characteristics of various high-entropy alloy preparation methods were summarized, and the prospective development direction of additive manufacturing high-entropy alloy was discussed.关键词：Additive Manufacturing;High-entropy Alloy;Preparation Method;Development Direction
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发布时间：2023-12-18 - 摘要：<正>1、铝矾土:据显示,2020年10月中国进口铝矾土约为800.32万t,同比上涨23.54%;出口铝矾土约为0.724 3万t,同比上涨243.90%。2、氧化铝:数据显示,2020年10月中国进口氧化铝约为17.42万t,同比下降27.33%;出口氧化铝约为2 259t,同比下降46.71%。3、无水氟化铝:数据显示,2020年10月中国无水氟化铝进口量为0t。10月无水氟化铝出口量为8 765.91t,同比下滑0.79%。出口总价为9 954 302美元。
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发布时间：2023-12-18 - 摘要：<正>近日,国际镁业协会（IMA）向万丰镁瑞丁轻量化技术公司颁发了2020年度汽车镁铸造产品设计大奖,获奖产品为"车门上部腰线压铸镁合金加强件",由万丰镁瑞丁与通用汽车公司联合研发。该产品采取了整体式空心铸造的创新性轻量化设计,以单件镁合金压铸件取代了过去3种不同材料的5个零件,通过减少耗材、简化流程在减轻车身质量的同时提高适配和精度,并加强了关键位置的刚度和断裂稳健性,提升车身安全性。
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发布时间：2023-12-18 - 摘要：<正>2020国际（深圳）铸业展上,海天金属除了展示HDM450高端压铸机外,还带来了高科技产品锆基非晶合金的应用案例,使用其研制的高真空熔炼压射成型设备、锆基非晶合金材料,生产的锆基非晶合金压铸件产品。据悉,锆基非晶合金压铸件具有很高的抗拉强度,主要应用于医疗、3C、体育用品等行业,譬如手术刀及工具、手机中板、3C产品机壳、高尔夫球头等。据了解,海天金属已成功开发高真空熔炼压射成型设备,作为生产锆基非晶合金等压铸件的设备。据介绍,该设备主要应用于锆基非晶母合金、对氧敏感的铜合金等材料的高真空熔炼压射成型,其具备高真空环境熔炼与压射,工作真空度在10Pa以檪檪檪檪檪檪檪檪檪内;压射无卷气、困气等问题;设备可以实现自动化连续生产。
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发布时间：2023-12-18 - 摘要：<正>日前,奇瑞新能源推出了首款电动中型SUV——蚂蚁,据悉,蚂蚁车身是由全铝打造,由忠旺集团为其独家供货。"奇瑞蚂蚁从设计开发到全铝车身生产制造,再到提供整车,我们全程参与,并提供了一揽子服务。"忠旺集团项目负责人介绍说。这并不是忠旺集团与奇瑞新能源的首次合作。在蚂蚁之前,双方就已经形成了密切合作,成功推出了国内首款全檪檪檪檪檪檪檪檪檪檪檪铝合金车身新能源汽车奇瑞"小蚂蚁",该款车型是基于"全铝空间架构+全复合材料外覆盖件"的超级轻量化技术平台的首款小型纯电动车型,充分发挥了忠旺和奇瑞在铝合金产品设计、制造方面的优势,打造了新能源汽车领域的标杆性产品。
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发布时间：2023-12-18 - 摘要：<正>近日,上海-凯迪拉克发布了V系列BLACKWING高性能车型的无伪装外观图片,披露了该系列专属的镁合金轮毂,为采用锻旋（锻造加旋压）生产的镁合金轮毂。镁合金轮毂的灵感源于北美IMSA系列赛中屡获冠军的凯迪拉克DPi-V.R赛车。其有助于减轻车辆的簧下质量,提升操控性与整体驾驶体验。此次推出的量产锻旋镁合金轮毂将作为可选配置,随2022款CT4-V BLACKWING和CT5-V BLACK-WING于2021年夏季在北美上市。
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发布时间：2023-12-18 - 摘要：The ingots of AlCrNiTiSix（x=0,0.2,0.4,0.6,0.8,1） high-entropy alloys were fabricated by vacuum arc melting. The microstructure was analyzed through a combination of experiments and numerical simulations. The results reveal that AlCrNiTiSix high entropy alloys present all typical of dendritic structures, and the dendrite region is composed of FCC-structured AlNi2Ti phase and Cr-rich Laves phase, while the interdendritic region consists of a solid solution phase of four elements. The increase of Si content has significant effect on the dendrite region, which results in the transformations from the AlNi2Ti phase to the AlNi phase, and the Cr-rich Laves phase to（Cr,Ti）5Si3 phase. The interdendritic region is dominated by solid solutions of multiple elements. In addition, the hardness is increased with the addition of Si elements, which is attributed to the solid solution strengthening and the replacement of Laves phase by higher hardness（Cr,Ti）5Si3 phase. The experimental results were basically consistent with the simulated ones, The γ phase and BCC phase predicted by the simulation didn’t appear in the experimental ones.关键词：High Entropy Alloys;Microstructure;Hardness;Simulation Analysis
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发布时间：2023-12-18 - 摘要：Comprehensive considering the models of thermal gradient-solidification rate and Rayleigh number, an integrated criterion model for predicting freckle defects was established via the secondary development of ProCAST. C++ program was used to compile a plug-in code, and the simulation of freckle defects in single crystal（SC） blades was realized. The forming reasons of freckle defects were also analyzed by combining the temperature filed, flow field and the macro segregation of Re element. Freckle defects in stepped SC castings were investigated by different criteria models and comparison with the experimental results in the reference. The results indicate that the integrated criterion model can predict the occurrence of freckle defects accurately, which may provide theoretical support for the actual production of SC blades.关键词：Single Crystal Blades;Freckle Defects;Secondary Development of ProCAST;Numerical Simulation
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发布时间：2023-12-18 - 摘要：The relationship between microstructures and bendability of two kinds of 6016 aluminum alloy sheets with different Mg contents was investigated by scanning electron microscopy（SEM）, transmission electron microscopy（TEM） and electron back scattered diffraction（EBSD）. The results indicate that the bendability is dependent of precipitation free zone（PFZ） and texture. The further analysis reveals that the Mg contents affect distribution of phases and proportion of textures, which is a key factor influencing bendability of 6016 aluminum alloy.关键词：6016 Aluminum Alloy;Bendability;Precipitation Free Zone;Texture
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发布时间：2023-12-18 - 摘要：<正>据悉,挪威将建一条新的沿海高速公路,其中有一座世界上最长的铝合金悬索桥,长1 720m,桥跨度大于1 200m,铝桥达1 250m,铝合金用量为8～10kt,在世界建桥史上具有里程碑式的意义,其可行性研究报告已于2020年经专家组评审通过。根据可行性报告的精檪檪檪檪檪檪檪确计算,全铝桥的造价与钢桥的造价相等。虽然铝材的价格比钢材高,但铝桥结构的造价比钢桥的低,由此可得到补偿,例如塔、悬架（hanger）和主拉索（main cable）等结构的造价比钢桥的低得多。另外,在造价计算时,还未将铝桥"终身"不用维护、维修节约的费用,以及到期报废后回收废铝的高价值计算在内。
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发布时间：2023-12-18 - 摘要：It is one of the effective ways to achieve lightweight vehicles by increasing the usage of lightweight and high-strength aluminum alloys in the automotive field.However,due to the combined effects of stress and service environment,aluminum alloys are prone to corrosion cracking and failure in actual production.The current research status on the stress corrosion cracking susceptibility of high-strength aluminum alloy materials at home and abroad in recent years was reviewed from three aspects,namely metallurgical factors,environmental factors and stress factors.In addition,the development direction was prospected.关键词：Aluminum Alloy;Stress Corrosion Cracking;Sensitivity
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发布时间：2023-12-18 - 摘要：Inconel718 alloy was briefly introduced,and the characteristics and processing process of selected laser melting technology were briefly described. Meanwhile, the parameters of Inconel718 alloy produced by selective laser fusion have important influence on the properties of the forming samples. In addition, the mechanical properties of the alloy could be improved by heat treatment. Finally, the influence of δ phase on the alloy was discussed.关键词：Selective Laser Melting;Inconel718;Superalloys;Heat Treatment
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发布时间：2023-12-18 - 摘要：Based on the structure of the valve body, material and technical requirements, two kinds of die casting processes were designed and simulated by the ProCAST software. The position and origination of shrinkage holes were analyzed after solidification, and a better die casting process was optimized. The results reveal that there are the absence of shrinkage porosities in the valve body after the optimized casting process, which was verified by the practical production, meeting technical requirement.关键词：Valve Body;Die Casting Process Design;Numerical Simulation;Process Optimization
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发布时间：2023-12-18 - 摘要：There appeared a lot of cracking phenomena in the low pressure casting valve body parts of CuZn36 Bi0.8 bismuth-brass in the subsequent machining process. The origination of cracks in the low pressure casting valve body part of bismuth-brass was analyzed by means of SEM and EDS. The results show that the cracking of bismuth-brass valve body part is attributed to the serious partial segregation of Bi element in the process of low pressure casting. During low pressure casting, through controlling the convective velocity of metal liquid during solidification and increasing the cooling velocity, the regional segregation of bismuth-brass valve body part can be recluced or prevented.关键词：Bismuth-brass;Low Pressure Casting;Crack;Regional Segregation
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发布时间：2023-12-18 - 摘要：Due to the relatively high sealing requirements of some aluminum alloy die-casting parts of automobile engines, complex internal structures with uneven wall thickness often cause air leakage of such parts, resulting in poor quality parts. The improvement of the quality of the filter in an automobile engine was carried out as an example, aiming to reduce the shrinkage and porosity in the defect area of the casting. The virtual test design was carried out for the modification of the gating system and cooling system. Using computer calculations, the simulated results of the original design and the modified design were compared to obtain a solution to the defect. After on-site trials of die-casting trials and leakage detection, the modified scheme has obvious effects on improving shrinkage and porosity defects, and the internal quality of parts was significantly improved, and the stability of part quality was guaranteed.关键词：Die Castings;Sealing Requirements;Shrinkage;Gas Hole;Virtual Test
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发布时间：2023-12-18 - 摘要：In order to obtain the solidification crystal structure in the approximate axis direction, a new continuous casting process was developed for the Cu-20 Ag alloy with high Ag alloy content, and the crystallizer with thermal insulation pad was designed. The temperature field on the casting billet under the new crystallizer was performed by finite element simulation and experimental verification. The results reveal that the new crystallizer can realize the concave solid-liquid interface of Cu-20 Ag alloy, and the temperature field distribution of the cast billet after solidification presents the radial temperature gradient, which is gradually decreased along the length of the rod until the radial temperature gradient is close to zero. At this time, columnar crystal almost along axial is easy to form, and the simulation results are consistent with the experiment ones.关键词：Cu-20Ag Alloy;Crystallizer;Design;Temperature Field
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发布时间：2023-12-18 - 摘要：The nodular cast iron inspection well chamber was produced by the EPC process. The lost foam process for integral casting and the existing pipe fitting mold were adopted, which used less mold and low production cost; T-type and K-type socket connection and flange type interface connection with the pipeline were adopted, which has good sealing performance, simple assembly, convenient construction and low maintenance cost; The well chamber was coated with anti-corrosion coating inside and outside, which has good corrosion resistance and long service life.关键词：Inspection Well;EPC Process;Interface Type;Assembly Construction
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发布时间：2023-12-18 - 摘要：Literature retrieval, data extraction and quantitative analysis on patent documents in the field of global titanium alloy precision casting were carried out, aiming at understanding the status of intellectual property rights in the field. From the perspective of overall overview, technology analysis, key patent analysis and patent legal status analysis, the patent of global titanium alloy precision casting was revealed, presenting the development trend of global titanium alloy precision technology. The results show that China and Japan have a large number of patent applications, and attention should be paid to the technological progress of Chinese and overseas enterprises. Patent protection need to focus on technical topics such as oxide ceramic shell, centrifugal casting and investment casting.关键词：Titanium Alloy;Precision Casting;Patent;Technology
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发布时间：2023-12-18 - 摘要：The effects of different cooling rates on the microstructure and mechanical properties at different wall thickness locations of the plaster casting ZL205 Aalloy were investigated.The results indicate that the grain size of alloy is obviously refined with the increase of the cooling rate.When the cooling rate is low,the grain size and mechanical properties of the alloy exist gradients at different wall thicknesses,and microstructure and mechanical properties of each part of the alloy can be fairly well-distributed by increasing the cooling rate.When a 30 mm thick cold iron is placed,the average grain size of each part of alloy reach 70μm,and the average tensile strength reaches 389.8 MPa,while the elongation is only 5.4%.关键词：Cooling Rate;Plaster Casting;ZL205AAlloy
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发布时间：2023-12-18 - 摘要：Three-dimensional jet printing technology（3 DP） is suitable for low-cost and rapid manufacturing of complex sand molds. However, due to its special forming principle of bonding loose powder layer by layer, the sand mold has high porosity and low strength, which affects the qualification rate of castings. Aming to this problem, the effects of phenolic resin content and heat treatment temperature on the tensile strength of the sand mold were investigated. Adhesive which is composed of absolute ethanol, polyethylene glycol-400 and deionized water（mass ratio is 86∶9∶5） was used to spray-print the coated sand with different phenolic resin content and at different heating temperatures. The results reveal that with the increase of phenolic resin content and heat treatment temperature, the tensile strength of the sand mold is gradually increased. At a resin content of 3.5% and treatment of 175 ℃×2 h, the strength of the sand mold reaches the maximum volue, which are 4.238 MPa.关键词：Three-dimensional Printing;Coated Sand;Phenolic Resin;Heat Treatment;Tensile Strength
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发布时间：2023-12-18 - 摘要：The gating system was designed for the thin-walled electronic case frame casting. The process was simulated and the optimal process was determined by the simulation software. The trial production of the casting was completed by 3 D printing sand mold casting process. The castings were well formed with the minimum wall thickness of 2.5 mm,of which the dimensional accuracy and internal quality could meet the requirements.关键词：Gating System;Simulation and Optimization;3D Printing Sand Mold;Internal Quality
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发布时间：2023-12-18 - 摘要：Fe-based amorphous coatings were prepared on the surface of magnesium alloy by HVOF spraying, and the preparation parameters were optimized. By adding Ni-based interlayer, Fe-based amorphous coating can effectively bond with magnesium alloy substrate, and the minimum porosity reaches 1.65%, and the highest amorphous content is 96.2%, and the highest hardness is 951 HV0.2.With the oxygen flow rate of 52 m3/h and the kerosene flow rate of 23 L/h, the bonding strength can reach 54.79 MPa. As the transition layer of mechanics and thermodynamics, the Ni-based intermediate layer can realize the mechanical interlock with magnesium alloy substrate through atomic diffusion, and it can interact with Fe-based amorphous coatings. The bonding strength can be improved by increasing the energy of particles, reducing the porosity and the oxidation degree.关键词：Magnesium Alloy;Fe-based Amorphous Coating;Intermediate Layer;Bond Strength
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发布时间：2023-12-18 - 摘要：B4C/Al matrix composites were prepare at 800 ℃ by mechanical stirring with Ar protection and A356 aluminum alloys as matrix. The effects of B4C addition on properties of composites were analyzed.The properties were characterized through the mechanical property experiments, microstructure observation, friction and wear performance tests. The results indicate that the performance of compositesis reaches the satisfied effect with B4C content of 6%, where the tensile strength and hardness are increased by 17%, 34% and wear rate is decreased by 34%.关键词：B4C;Composites;Mechanical Properties;Friction and Wear
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发布时间：2023-12-18 - 摘要：The high-power laser welding of particle-reinforced ZrB2 p/6061 Al matrix composites was carried out, and the effect of laser welding on the microstructure and performance of aluminum matrix composite welds was explored, thus optimizing the preparation parameters of composites. By analyzing the weld microstructure under various welding parameters, the optimal welding parameters and weld microstructure were presented. The results reveal that with laser power of 2 000 W, moving speed of 7 mm/s and welding angle of 85°, the aluminum matrix grains are refined obviously after welding with the particles dispersed evenly and the particle clusters disappearing, meanwhile, the average Vickers hardness in the weld zone is 64.6 HV.关键词：Particle Reinforced Aluminum Matrix Composite;Nanoparticles;High-Power Laser Welding
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发布时间：2023-12-18 - 摘要：Mg-3 Al-1 Zn-xSn alloy（x=3,6,9,%, in mass fraction） was prepared by melt-casting method, and damping behavior was analyzed by using dynamic thermal analyzer（DMA）, and its high-temperature damping mechanism was described. The results reveal that the high temperature damping mechanism of the alloy is divided into two main stages: the elastic damping stage and the microplastic damping stage. The damping in the elastic damping stage is attributed to the combined action of the grain boundary damping mechanism and the dislocation damping mechanism. The activation energy of the grain boundary can be described by the Arrhenius formula. The damping mechanism in the microplastic deformation stage is mainly the frequency-dependent microplastic damping mechanism.关键词：Mg-Al-Zn-Sn Alloy;Microstructure;Temperature;Damping Mechanism
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发布时间：2023-12-18 - 摘要：The effects of ultrasonic power on solidification microstructure and mechanical properties of hypereutectic Al-Mg-Si alloy were investigated.The results indicate that the primary Mg2Si can be refined and the mechanical properties of alloy can be enhanced under the ultrasonic treatment with 600 W and 1 000 W. When the ultrasonic power reaches 1 400 W, some high solid solution coarse microstructure appears near the primary Mg2Si phase in spite that the size of primary Mg2Si becomes finer, which is attributed to the local overheat caused by high power ultrasonic treatment, resulting in the degradation of mechanical properties.关键词：Ultrasonic Treatment;Al-14Mg-7Si Alloy;Mg2Si;Grain Refinement
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发布时间：2023-12-18 - 摘要：The effects of heat treatment on microstructure and mechanical properties of A356 alloy modified by mixed rare-earth were investigated.The results reveal that the eutectic silicon in A356 alloy is all transformed into nearly spherical granular structure with 0.5% mixed rare-earth modification and T6 treatment.Both the Brinell hardness and tensile strength of the alloy reach the maximum values,which are 98.3 HBW and 303.5 MPa,respectively.Meanwhile,the elongation of the alloy is 7.32%.Compared with those of the alloy modified with 0.5%mixed rare-earth without heat treatment,mechanical properties are increased by 64.93%,32.88% and 10.91%,respectively.The fracture of the alloy is characterized by ductile fracture,and comprehensive mechanical properties are enhanced significantly.关键词：A356Aluminum Alloy;Mixed Rare-earth Modification;T6Heat Treatment;Mechanical Properties
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发布时间：2023-12-18 - 摘要：Effects of untreated, ultrasonic, Zr modification, compound treatment of Zr and ultrasonic were investigated on solidified structure and compressive properties of Mg-5 Y-2.5 Zn-1.2 Ca alloy enhanced by long period structure. Effects of ultrasonic power and processing time on the alloy with compound treatment were also analyzed. The results show that ultrasonic treatment, Zr treatment and compound treatment can all improve solidified structure and mechanical properties of the alloy, among which the compound treatment has the satisfied effect. Compared with those of the untreated alloy, the compressive strength and the compressive rate of the alloy with compound treatment are increased by 15.3%and 15.7%, respectively. With the increase of ultrasonic power in the range of 0～900 W, primary phase in the alloy is refined at first and then coarsened, and the turning point is 700 W. In the range of 0～90 s, with the increase of ultrasonic processing time, primary phase in the alloy is refined at first and then coarsened, and the turning point is 60 s. With decreasing in the grain size, the distribution of the second phase is presented more uniform, and the compressive strength is increased.关键词：Zr;Ultrasonic;Mg-Y-Zn-Ca Alloy;Solidified Structure;Compression Performance
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发布时间：2023-12-18 - 摘要：The Ti-48 Al-2 Nb-2 Cr alloy was deposited and repaired by electron beam. The surface formation and microstructure evolution of Ti-Al intermetallic compound electron beam repair layer were investigated. The results show that Ti-48 Al-2 Nb-2 Cr electron beam repair is easy to generate defects such as pores and cracks. The α2 phase is gradually increased and the γ phase is gradually decreased from the base material to the center of the repair layer. The grains in the central area of the repair layer are untransformed needle-shaped α2/γ phases, and the grain boundaries are massive γm phases. The heat-affected zone of near-repair layer presents a dual-state structure which are composed of fine equiaxed γ grains and α2/γ lamellar clusters. The heat-affected zone in near-base-material is mainly composed of large-sized equiaxed γ grains and a few fine strips along the crystal like α2 phase composition. Due to the diversity of grain size and structure, the microhardness of the alloy at each area is different, presenting a trend of gradually decreasing from the weld to the base material. The center hardness of the repair layer can reach up to 590 HV0.2, and the average hardness is about 520 HV0.2, and there is no significant difference in hardness at different depths at the same area.关键词：Electron Beam Repair;Repair Layer Forming;Microstructure Transformation;Microhardness
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发布时间：2023-12-18 - 摘要：The effects of thermal exposure on microstructure and properties of the Nb-22.5 Cr-0.12 MgO alloys prepared by mechanical alloying and hot pressing were investigated by thermally exposed at 1 200 ℃ for 30 h and 50 h, respectively. The results reveal that the Nb-22.5 Cr-0.12 MgO alloy is composed of Nb solid solution and fine Laves phase NbCr2 with uniform distribution. During the thermal exposure process,the alloy can remain steady phase constituent and excellent room-temperature fracture toughness.After thermal exposure at 1 200 ℃ for 50 h, the compressive strength is decreased to 2 655 MPa, which is reduced by 18.5% compared to unexposed ones, thus the alloy possesses poor thermal stability.关键词：Nb-based Superalloy;MgO;Thermal Stability;Room Temperature Compressive Properties
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发布时间：2023-12-18 - 摘要：The model of QSn7-0.2 sliding bearing in two-pass spinning was established based on the Simufact finite element software. The simulated experiment scheme was built up by the orthogonal experiment method, and the significant degree of influence of the thinning rate, the pass ratio, the one-time feed ratio, the second-pass feed ratio on the deformation uniformity of sliding bearing and the optimal combination of parameters were obtained by the range analysis. Then the optimized parameter combination was verified by the experiments. The results reveal that when the thinning rate is 28, the pass ratio is 5∶5, the one-time feed ratio is 0.8 mm/r, the second-pass feed ratio is 1 mm/r, the sliding bearing after two-pass spinning can have the better deformation uniformity.关键词：Sn-brone Sliding Bearing;Orthogonal Experiment;Equivalent Strain;Two-pass Spinning
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发布时间：2023-12-18 - 摘要：The as-cast single crystal copper bar billet with ?16 mm was prepared by self-made heated mold horizontal continuous casting equipment, and the as-drawn bar billet with ?12 mm was produced by single-pass cold drawing. The effects of cold drawing on grain orientation and fracture mechanism of single crystal copper were investigated by means of XRD, SEM, combined with tensile tests at room temperature.The results reveal that the cross-section grain orientation of single crystal copper is changed obviously after drawing, exhibiting the increased texture component. The longitudinal-section texture component is remained. However, the volume fraction is varied. The cold drawing has significant influence on the fracture mechanism, which presents as a micropore-dimple aggregation fracture for as-cast specimens, while presents as a micropore growth fracture for as-drawn specimens.关键词：Cold Drawing;Heated Mold Continuous Casting;Single Crystal Copper;Grain Orientation;Fracture Mechanism
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发布时间：2023-12-18
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