Mechanical properties ofB<sub>4</sub>C<sub>p</sub>/2024Al composites prepared by squeeze casting

Wang Yangwei; Zhang Weiguan; Tian Qiandong; Wang Yiming; Wang Fuchi

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Mechanical properties ofB₄C_p/2024Al composites prepared by squeeze casting
- role： First author 第一作者
- Affiliation：
  School of material science and engineering, Beijing Institute of Technology,Beijing,100081
Wang Yangwei
1 ,
- Affiliation：
  School of material science and engineering, Beijing Institute of Technology,Beijing,100081
Zhang Weiguan
1 ,
- Affiliation：
  School of material science and engineering, Beijing Institute of Technology,Beijing,100081
Tian Qiandong
1 ,
- Affiliation：
  School of material science and engineering, Beijing Institute of Technology,Beijing,100081
Wang Yiming
1 ,
- Affiliation：
  School of material science and engineering, Beijing Institute of Technology,Beijing,100081
Wang Fuchi
1
Issue S1, Pages: 428-431(2008)
Published： 2008 ，
DOI：

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[1]王扬卫,张维官,田擎东,王一鸣,王富耻.挤压铸造B_4C_p/2024Al复合材料力学性能研究[J].特种铸造及有色合金,2008(S1):428-431.

Wang Yangwei, Zhang Weiguan, Tian Qiandong, et al. Mechanical properties ofB₄C_p/2024Al composites prepared by squeeze casting. [J]. Special Casting & Nonferrous Alloys (S1):428-431(2008)
[1]王扬卫,张维官,田擎东,王一鸣,王富耻.挤压铸造B_4C_p/2024Al复合材料力学性能研究[J].特种铸造及有色合金,2008(S1):428-431. DOI：

Wang Yangwei, Zhang Weiguan, Tian Qiandong, et al. Mechanical properties ofB₄C_p/2024Al composites prepared by squeeze casting. [J]. Special Casting & Nonferrous Alloys (S1):428-431(2008) DOI：

Abstract

Two types of 50vol%B4Cp/2024Al composites with the particle size of 25 μm and 50 μm were prepared by squeeze casting. The density, hardness, flexural strength, quasi-static compressive strength, KIC of composites was tested, and the dynamic compressive strength under high strain rate load was examined by Split Hopkinson Pressure Bar system. The results show that: The density of 50vol%B4Cp/2024Al composite is 2.7 g/cm3, and the hardness is 60 HRA; When the size of B4C particles is 25 μm, the composite’s flexural strength is 527 MPa, KIC is 13.56 MPa·m1/2 and the quasi-static compressive strength is 797.5 MPa, distinctly higher than that of the composite with particle size of 50μm. In addition, the dynamic compressive strength of fine-particle reinforced composite is relatively higher than that coarse-particle reinforced one. Strain dependent damage evolution leads to the strain softening, and rate dependent damage evolution caused the insensibility of strain rate or even negative strain rate effect.

transl

Keywords

Squeeze Casting; Metal Matrix Composites; Mechanical Properties; high strain rate; size effect

transl

摘要

采用挤压铸造工艺制得粒径分别为25μm和50μm、体积分数为50%的两种B4Cp/2024Al复合材料。测试了复合材料的密度、硬度、抗弯强度、静态压缩强度、断裂韧度;采用霍普金森压杆装置研究了复合材料在高应变速率下的压缩强度。研究结果表明

50%B4Cp/2024Al复合材料的密度约为2.7g/cm3

硬度（HRA）为60;25μmB4Cp增强的复合材料抗弯强度为527MPa

断裂韧度KIC达到13.56MPa.m1/2

而静态压缩强度为797.5MPa

其性能显著高于50μm粒度B4C增强的复合材料。细颗粒增强的复合材料动态压缩强度高于粗颗粒增强的复合材料;应变相关的损伤演化使得复合材料表现出应变软化现象

相关损伤导致压缩强度呈现应变率不敏感甚至是负敏感特征。

Abstract

Two types of 50vol%B4Cp/2024Al composites with the particle size of 25 μm and 50 μm were prepared by squeeze casting. The density

hardness

flexural strength

quasi-static compressive strength

KIC of composites was tested

and the dynamic compressive strength under high strain rate load was examined by Split Hopkinson Pressure Bar system. The results show that: The density of 50vol%B4Cp/2024Al composite is 2.7 g/cm3

and the hardness is 60 HRA; When the size of B4C particles is 25 μm

the composite’s flexural strength is 527 MPa

KIC is 13.56 MPa·m1/2 and the quasi-static compressive strength is 797.5 MPa

distinctly higher than that of the composite with particle size of 50μm. In addition

the dynamic compressive strength of fine-particle reinforced composite is relatively higher than that coarse-particle reinforced one. Strain dependent damage evolution leads to the strain softening

and rate dependent damage evolution caused the insensibility of strain rate or even negative strain rate effect.

关键词

挤压铸造金属基复合材料力学性能高应变率尺寸效应

Keywords

Squeeze CastingMetal Matrix CompositesMechanical Propertieshigh strain ratesize effect

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Mechanical properties ofB4Cp/2024Al composites prepared by squeeze casting

Wang Yangwei

Zhang Weiguan

Tian Qiandong

Wang Yiming

Wang Fuchi

DOI：

Abstract

Keywords

摘要

Abstract

关键词

Keywords

references

Mechanical properties ofB₄C_p/2024Al composites prepared by squeeze casting