冷却速度对Cu47Zr46Al6Nb1非晶合金组织及力学性能的影响

张丹; 邱克强; 宋新颖; 胡壮麒

doi:10.15980/j.tzzz.2015.03.026

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冷却速度对Cu₄₇Zr₄₆Al₆Nb₁非晶合金组织及力学性能的影响
Effect of Cooling Rate on the Precipitate Phase and Mechanical Properties of Cu₄₇Zr₄₆Al₆Nb₁ Alloy
2015年35卷第3期页码：314-317
纸质出版日期： 2015 ，
DOI： 10.15980/j.tzzz.2015.03.026

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[1]张丹,邱克强,宋新颖,胡壮麒.冷却速度对Cu_(47)Zr_(46)Al_6Nb_1非晶合金组织及力学性能的影响[J].特种铸造及有色合金,2015,35(03):314-317.

Zhang Dan, Qiu Keqiang, Song Xinying, et al. Effect of Cooling Rate on the Precipitate Phase and Mechanical Properties of Cu₄₇Zr₄₆Al₆Nb₁ Alloy[J]. Special Casting & Nonferrous Alloys, 2015,35(3):314-317.
[1]张丹,邱克强,宋新颖,胡壮麒.冷却速度对Cu_(47)Zr_(46)Al_6Nb_1非晶合金组织及力学性能的影响[J].特种铸造及有色合金,2015,35(03):314-317. DOI： 10.15980/j.tzzz.2015.03.026.

Zhang Dan, Qiu Keqiang, Song Xinying, et al. Effect of Cooling Rate on the Precipitate Phase and Mechanical Properties of Cu₄₇Zr₄₆Al₆Nb₁ Alloy[J]. Special Casting & Nonferrous Alloys, 2015,35(3):314-317. DOI： 10.15980/j.tzzz.2015.03.026.

摘要

通过铜模铸造法

制备了Φ2、Φ3、Φ5mm的Cu47Zr46Al6Nb1合金试棒。分别采用X射线衍射仪（XRD）、扫描电镜（SEM）和力学性能试验机对合金的相组成、结构和力学性能进行了研究。结果表明

Φ2mm试样为非晶态

随着试样直径增大

合金中开始析出CuZr相和Cu10Zr7相

且Cu10Zr7相的体积分数随直径的增加而增加。在单轴压缩载荷下

Φ2、Φ3、Φ5mm合金的压缩断裂强度分别为1 606、1 510和838MPa

断裂形貌由Φ2mm时的脉状花纹变为Φ5mm时的微观裂纹、类似晶态相断裂及脉状花纹三者共存。另外

讨论了Cu10Zr7相的析出及其对合金力学性能及断裂形貌的影响。

Abstract

Alloy samples of Cu47Zr46Al6Nb1 with 2

3and 5 mm in diameters were fabricated by copper mold casting method.The phase constitution

microstructure and mechanical properties of the alloys prepared were investigated by using X-ray diffraction

scanning electron microscopy and electronic testing machine.The results show that the sample with 2mm in diameter exhibits totally amorphous structure.CuZr and Cu10Zr7 phase are precipitated from the alloys with the decrease of cooling rate and the volume of Cu10Zr7 is increased with the increase of diameter.Under uniaxial compressive loading

the compressive fracture strength of the as-cast Cu47Zr46Al6Nb1 alloys with 2mm

3mm and 5mm in diameter reach 1 606、1 510 and 838 MPa

respectively

and the fracture surface is evolved from vein pattern（Φ2mm）to the coexistence of microscopic crack

pattern similar to the fracture of crystalline phase and vein pattern（Φ5 mm）.Moreover

influencing factors of precipitated Cu10Zr7 on mechanical properties and fracture surface of the alloy were described.

关键词

冷却速度析出相力学性能断裂形貌

Keywords

Cooling RatePrecipitate PhaseMechanical PropertiesFracture Microstructure

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