Cu-Be/Cu-Zn层状复合材料固溶时效后的显微组织与力学性能

doi:10.13251/j.issn.0254-6051.2020.11.009

金属热处理 ›› 2020, Vol. 45 ›› Issue (11): 43-48.DOI: 10.13251/j.issn.0254-6051.2020.11.009

Cu-Be/Cu-Zn层状复合材料固溶时效后的显微组织与力学性能

唐延川, 许举文, 张欣磊, 崔泽云, 王文慧

华东交通大学材料科学与工程学院, 江西南昌 330013

收稿日期:2020-04-25 出版日期:2020-11-25 发布日期:2020-12-29
作者简介:唐延川(1989—),男,副教授,硕士生导师,博士,主要研究方向为金属材料压力加工及组织性能控制、先进金属结构材料开发及金属基复合材料激光成形技术,E-mail: tangyanchuan89@163.com
基金资助:
国家自然科学基金(51701074);江西省自然科学基金(20181BAB216003);江西省教育厅项目(GJJ170407)

Microstructure and mechanical properties of Cu-Be/Cu-Zn laminated composite after solution and aging treatment

Tang Yanchuan, Xu Juwen, Zhang Xinlei, Cui Zeyun, Wang Wenhui

School of Materials Science and Engineering, East China Jiaotong University, Nanchang Jiangxi 330013, China

Received:2020-04-25 Online:2020-11-25 Published:2020-12-29

摘要/Abstract

摘要： 通过真空热压、冷轧变形及后续热处理的方式制备了Cu-Be/Cu-Zn层状复合材料,利用XRD、OM、SEM和EDS对不同热处理状态下材料的物相及显微组织进行了研究,测试并分析了材料的力学性能。结果表明,固溶态及时效态Cu-Be/Cu-Zn层状复合材料的主要物相均为Cu_0.7Zn_0.3相及Cu相,时效态层状复合材料中还存在少量CuBe相;固溶态及时效态层状复合材料晶粒尺寸均呈双峰分布,Cu-Zn层晶粒尺寸约为Cu-Be层的3倍。经过相同的固溶及时效热处理后,Cu-Be/Cu-Zn层状复合材料抗拉强度为857 MPa,较Cu-Be合金低23.0%,但均匀伸长率达到15.3%,较Cu-Be合金提高了4.7倍。根据KME模型,塑性变形过程中Cu-Be/Cu-Zn 层状复合材料的位错动态回复速率较Cu-Be合金大幅降低,材料的应变硬化能力显著提高,这是Cu-Be/Cu-Zn层状复合材料具有高强韧性的主要原因。

关键词: Cu-Be/Cu-Zn层状复合材料, 固溶时效处理, 显微组织, 力学性能, 应变硬化

Abstract: Cu-Be/Cu-Zn laminated composites were prepared by vacuum hot pressing, cold rolling and subsequent heat treatment. The phase and microstructure of the composite under different heat treatment conditions were investigated by means of XRD, OM, SEM and EDS. The mechanical properties of the composite were tested and analyzed. The results show that the main phases of the Cu-Be/Cu-Zn laminated composite under the solid solution state and aging state are Cu_0.7Zn_0.3 phase and Cu phase, and there is a little CuBe phase in the laminated composite under the aging state. The grain size of the laminated composite under both heat treatment conditions presents the bimodal distribution and the grain size of the Cu-Zn layers is about three times of that of the Cu-Be layers. After the same solid solution and aging treatment, the ultimate tensile strength of the Cu-Be/Cu-Zn laminated composite is 857 MPa, which is lower than that of the Cu-Be alloy by 23.0%. However, the uniform elongation of the laminated composite reaches 15.3%, which is 4.7 times higher than that of the Cu-Be alloy. According to KME model, the dislocation dynamic recovery rate of the Cu-Be/Cu-Zn laminated composite is much lower than that of the Cu-Be alloy during plastic deformation, resulting in a significant improvement of the strain hardening capacity of the material, which is the main reason for the high strength and ductility of the Cu-Be/Cu-Zn laminated composite.

Key words: Cu-Be/Cu-Zn laminated composite, solid solution and aging treatment, microstructure, mechanical properties, strain hardening

中图分类号:

TG146.1⁺1

唐延川, 许举文, 张欣磊, 崔泽云, 王文慧. Cu-Be/Cu-Zn层状复合材料固溶时效后的显微组织与力学性能[J]. 金属热处理, 2020, 45(11): 43-48.

Tang Yanchuan, Xu Juwen, Zhang Xinlei, Cui Zeyun, Wang Wenhui. Microstructure and mechanical properties of Cu-Be/Cu-Zn laminated composite after solution and aging treatment[J]. Heat Treatment of Metals, 2020, 45(11): 43-48.

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Cu-Be/Cu-Zn层状复合材料固溶时效后的显微组织与力学性能

Microstructure and mechanical properties of Cu-Be/Cu-Zn laminated composite after solution and aging treatment

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