弯曲矫直变形路径对ZK60镁合金板材组织及性能的影响

doi:10.13251/j.issn.0254-6051.2023.04.012

金属热处理 ›› 2023, Vol. 48 ›› Issue (4): 74-78.DOI: 10.13251/j.issn.0254-6051.2023.04.012

弯曲矫直变形路径对ZK60镁合金板材组织及性能的影响

任健斌^1,2, 王昆^1,2, 梁伟^1,2, 聂慧慧^2,3, 李线绒^1,2

1.太原理工大学材料科学与工程学院, 山西太原 030024;
2.太原理工大学先进镁基材料山西重点实验室, 山西太原 030024;
3.太原理工大学机械与运载工程学院, 山西太原 030024

收稿日期:2022-10-15 修回日期:2023-01-12 发布日期:2023-05-27
通讯作者: 梁伟,教授,博士生导师,E-mail: liangwei@tyut.edu.cns
作者简介:任健斌(1996—),男,硕士研究生,主要研究方向为镁合金变形,E-mail: 408031106@qq.com。
基金资助:
国家自然科学基金(U1810208)

Effect of deformation path of corrugated wide limit alignment on microstructure and properties of ZK60 magnesium alloy sheet

Ren Jianbin^1,2, Wang Kun^1,2, Liang Wei^1,2, Nie Huihui^2,3, Li Xianrong^1,2

1. College of Materials Science and Engineering, Taiyuan University of Technology, Taiyuan Shanxi 030024, China;
2. Shanxi Key Laboratory of Advanced Magnesium-based Materials, Taiyuan University of Technology, Taiyuan Shanxi 030024, China;
3. College of Mechanical and Vehicle Engineering, Taiyuan University of Technology, Taiyuan Shanxi 030024, China

Received:2022-10-15 Revised:2023-01-12 Published:2023-05-27

摘要/Abstract

摘要： 通过弯曲矫直工艺在较大尺寸的ZK60镁合金板材中成功预置大体积分数的拉伸孪晶,研究了在200 ℃沿RD(轧向)和TD(横向)方向弯曲矫直对板材组织及力学性能的影响。结果表明,不同弯曲矫直方向下ZK60镁合金板材的组织和性能不同。沿RD方向进行弯曲矫直时产生的拉伸孪晶数量要高于沿TD方向弯曲矫直时产生的;在沿RD 方向进行拉伸时,沿RD方向进行弯曲矫直的试样屈服强度降低,抗拉强度升高,而沿TD方向进行弯曲矫直的试样屈服强度会大幅升高,抗拉强度略有升高。在沿TD方向进行拉伸时,沿TD 或者RD方向进行弯曲矫直的试样屈服强度和抗拉强度都会提高。经过弯曲矫直之后的应变硬化指数(n值)有所提高,塑性应变比(r值)大幅下降,有利于改善镁合金板材的塑性成形性能。

关键词: 镁合金板材, 弯曲矫直, 变形路径, 力学性能

Abstract: Large volume fraction of tensile twins were preset in ZK60 magnesium alloy sheet by corrugated wide limit alignment. The effects of deformation path along RD (rolling direction) and TD (transverse direction) at 200 ℃ on the microstructure and mechanical properties of the sheet were studied. The results show that the microstructure and properties of the ZK60 magnesium alloy sheet are different under different deformation paths. When deformed along RD direction, the volume fraction of tensile twins is higher than that deformed along the TD direction. When the tensile test is carried out along the RD direction, the yield strength of the sample deformed along the RD direction decreases and the tensile strength increases, while the yield strength of the sample deformed along the TD direction increases significantly and the tensile strength increases slightly. When the tensile test is carried out along the TD direction, all the yield strength and tensile strength of the sample deformed along the RD and TD direction increase. After the corrugated wide limit alignment, the strain-hardening exponent (n value) increases and the plastic strain ratio (r value) decreases significantly, which is beneficial to effectively improve the plastic forming performance of magnesium alloy sheet.

Key words: Mg alloy sheet, corrugated wide limit alignment, deformation path, mechanical properties

中图分类号:

TG166.4

任健斌, 王昆, 梁伟, 聂慧慧, 李线绒. 弯曲矫直变形路径对ZK60镁合金板材组织及性能的影响[J]. 金属热处理, 2023, 48(4): 74-78.

Ren Jianbin, Wang Kun, Liang Wei, Nie Huihui, Li Xianrong. Effect of deformation path of corrugated wide limit alignment on microstructure and properties of ZK60 magnesium alloy sheet[J]. Heat Treatment of Metals, 2023, 48(4): 74-78.

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弯曲矫直变形路径对ZK60镁合金板材组织及性能的影响

Effect of deformation path of corrugated wide limit alignment on microstructure and properties of ZK60 magnesium alloy sheet

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