高成形性镁合金板材的成分优化

曾卓然; 边明哲; 徐世伟; 唐伟能; Chris Davies; Nick Birbilis; 聂建峰

doi:10.1007/s12613-021-2365-4

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文章导航 > 矿物冶金与材料学报（英文） > 2022 > 29(7): 1388-1395

Zhuoran Zeng, Mingzhe Bian, Shiwei Xu, Weineng Tang, Chris Davies, Nick Birbilis, and Jianfeng Nie, Optimisation of alloy composition for highly-formable magnesium sheet, Int. J. Miner. Metall. Mater., 29(2022), No. 7, pp. 1388-1395. https://doi.org/10.1007/s12613-021-2365-4

Cite this article as:

Zhuoran Zeng, Mingzhe Bian, Shiwei Xu, Weineng Tang, Chris Davies, Nick Birbilis, and Jianfeng Nie, Optimisation of alloy composition for highly-formable magnesium sheet, Int. J. Miner. Metall. Mater., 29(2022), No. 7, pp. 1388-1395. https://doi.org/10.1007/s12613-021-2365-4

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研究论文

高成形性镁合金板材的成分优化

1)
College of Engineering and Computer Science, Australian National University, ACT. 2601, Australia
2)
Department of Materials Science and Engineering, Monash University, VIC 3800, Australia
3)
湖南大学汽车车身先进设计制造国家重点实验室，长沙 410012，中国
4)
宝钢集团有限公司中央研究院(技术中心)，上海 201999，中国
5)
Department of Mechanical and Aerospace Engineering, Monash University, VIC 3800, Australia

通讯作者:
曾卓然    E-mail: zhuoran.zeng@anu.edu.au

徐世伟    E-mail: xushiwei@hnu.edu.cn

聂建峰    E-mail: jianfeng.nie@monash.edu

文章亮点

(1) 系统研究了微合金化Mg–Zn–Zr的力学性能。

(2) 揭示了Mg–Zn体系板材中钆和钙的微量共同添加提高成形性的作用机制。

(3) 展示了微合金元素晶界偏聚对晶界韧性的影响规律。

中文摘要

镁是最轻的金属结构材料。然而，镁合金板材具有织构强，室温成形性差的瓶颈难题，限制其广泛应用。虽然研究发现在Mg–Zn–Zr合金体系同添加钙或钆能弱化织构，提高成形性，但这两种元素添加后对的效果尚未有过系统比较和研究。本文旨在展现微合金添加钆和钙对于显微结构和力学性能的影响规律。本文发现，Mg–Zn–Gd–Zr 与 Mg–Zn–Ca–Zr轧板有类似的弱织构，但是Mg–Zn–Gd–Zr轧板的延伸率和成形性高于Mg–Zn–Ca–Zr。当在Mg–1Zn–0.5Zr合金中添加0.4wt%钆、0.2wt%钙时能获得最高的室温延伸率，其深冲成形性可以和铝合金板材6016相媲美。当钙的含量从0.2wt%提升至0.5wt%后，合金板材的延伸率与成形性下降，其主要原因是钙的过量添加导致了晶界脆化，降低了晶界韧性从而裂纹容易从晶界处萌生并扩展。

关键词:

Research Article

Optimisation of alloy composition for highly-formable magnesium sheet

+ Author Affiliations

1)
College of Engineering and Computer Science, Australian National University, ACT. 2601, Australia
2)
Department of Materials Science and Engineering, Monash University, VIC 3800, Australia
3)
State Key Laboratory of Advanced Design and Manufacturing for Vehicle Body, Hunan University, Changsha 410082, China
4)
Research Institute (R & D Center), Baosteel Group Corporation, Shanghai 201999, China
5)
Department of Mechanical and Aerospace Engineering, Monash University, VIC 3800, Australia

Corresponding authors:
Zhuoran Zeng    E-mail: zhuoran.zeng@anu.edu.au

Shiwei Xu    E-mail: xushiwei@hnu.edu.cn

Jianfeng Nie    E-mail: jianfeng.nie@monash.edu
Received: 3 September 2021; Revised: 12 October 2021; Accepted: 13 October 2021; Available online: 15 October 2021

Abstract

Abstract

The effectiveness of Ca or Gd addition on ductility and formability of Mg–Zn–Zr based dilute alloys in deep drawing has not been systematically compared previously. In this study, formable Mg–Zn–Gd–Zr and Mg–Zn–Ca–Zr sheet alloys are produced by hot rolling. These sheets have similarly weakened basal texture, but the sheet of the Mg–Zn–Gd–Zr alloys has higher ductility and formability than that of Mg–Zn–Ca–Zr alloys. The combined addition of 0.2wt% Ca and 0.4wt% Gd to the Mg–1Zn–0.5Zr (wt%) alloy leads to a Mg–1Zn–0.4Gd–0.2Ca–0.5Zr alloy that has even better ductility, and its formability during deep drawing is comparable to the benchmark Al6016 sheet. An increase in Ca content from 0.2wt% to 0.5wt% leads to decreased sheet ductility and formability, predominantly due to grain boundary embrittlement.
- magnesium sheet alloy;
- texture;
- microstructure;
- formability;
- solute segregation

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