摘要
镁合金的塑性不足一直是制约其广泛应用的关键问题之一。若镁合金的塑性能够得到大幅度改善,将会极大地拓展镁合金的应用领域。Mg-Gd系稀土镁合金因其优异的强度及耐热性而广受关注,如在其高强的基础上,能够具备良好的塑性,将进一步提高其综合力学性能、扩大其应用范围。本文针对Mg-Gd系合金的塑性改善研究,介绍了塑性变形的基本机制(滑移和孪生),综述了改善塑性的有效方法和机制,包括晶粒细化、第二相增强、纳米孪晶、双峰组织等,最后对几种方法的优缺点做了分析、总结及建议。
The insufficient plasticity of magnesium alloy,restricting its wide application,has always been one of the key problems.If the plasticity of magnesium alloy can be greatly improved,the application field of magnesium alloy will be immensely expanded.Mg-Gd alloys have attracted wide attention due to its excellent strength and heat resistance.Besides high strength,it can also have good plasticity,which will further improve its comprehensive mechanical properties and expand its application range.Therefore,in this paper,aiming at the plastic improvement of Mg-Gd alloy,the basic mechanism of plastic deformation(slip and twin)is systematically introduced and the effective methods and mechanisms for improving plasticity are reviewed in detail,including grain refinement,second phase enhancement,nano-scale twin,bimodal structure,etc.Finally,the advantages and disadvantages of several methods are analyzed,summarized and suggested.
作者
梅婉婉
李全安
陈晓亚
陈培军
谭劲峰
李向宇
Mei Wanwan;Li Quanan;Chen Xiaoya;Chen Peijun;Tan Jinfeng;Li Xiangyu(School of Materials Science and Engineering,Henan University of Science and Technology,Luoyang 471023,China;Provincial and Ministerial Co-construction of Collaborative Innovation Center for Non-ferrous Metal New Materials and Advanced Processing Technology,Luoyang 471023,China;Luoyang Shengya Magnesium Alloy Science and Technology Co.LTD,Luoyang 471921,China;CHINALCO Luoyang Copper Co.,LTD.,Luoyang 471003,China;Luoyang Copper(Group)Co.,Ltd.,Luoyang 471003,China)
出处
《中国稀土学报》
EI
CAS
CSCD
北大核心
2023年第4期674-690,I0001,共18页
Journal of the Chinese Society of Rare Earths
基金
国家自然科学基金项目(51571084)
中原英才计划—中原青年拔尖人才项目(豫组通[2021]44号)
河南省自然科学基金项目(222300420435)资助。
关键词
Mg-Gd系
晶粒细化
第二相增强
纳米孪晶
双峰组织
Mg-Gd alloys
grain refinement
second phase enhancement
nano-scale twin
bimodal structure
