自然科学版 英文版
自然科学版 英文版
自然科学版 英文版

您目前所在的位置:首页 - 期刊简介 - 详细页面

中南大学学报(自然科学版)

Journal of Central South University

第51卷    第9期    总第313期    2020年9月

[PDF全文下载]    [Flash在线阅读]

    

文章编号:1672-7207(2020)09-2405-08
挤压比对Mg-Gd-Ni合金微观组织、力学及腐蚀性能的影响
万佳,刘楚明,许诗源,王必正

(中南大学 材料科学与工程学院,湖南 长沙,410083)

摘 要: 制备3种挤压比分别为7.0,9.6,19.6的Mg-1.5Gd-0.2Ni(质量分数,%)合金,研究挤压比对合金微观组织、力学性能及腐蚀性能的影响。研究结果表明:随着挤压比从7.0增加至19.6,Mg基体再结晶越充分,其组织更加细小、均匀,因而提高了合金的综合力学性能。当挤压比为19.6时,合金的抗拉强度为228 MPa,屈服强度为167 MPa,断后伸长率为22.5%。挤压态合金在质量分数为3%KCl中的腐蚀速率比铸态合金的低。

 

关键字: 镁合金;挤压比;力学性能;腐蚀性能

Effect of extrusion ratio on microstructure, mechanical and corrosion properties of Mg-Gd-Ni alloy
WAN Jia, LIU Chuming, XU Shiyuan, WANG Bizheng

School of Materials Science and Engineering, Central South University, Changsha 410083, China

Abstract:The Mg-1.5 Gd-0.2 Ni (mass fraction, %) alloys with three kinds of extrusion ratio (7.0, 9.6, 19.6) were prepared. The effects of extrusion ratio on microstructure, mechanical properties and corrosion properties of Mg-1.5 Gd-0.2 Ni alloy were investigated. The results show that as the extrusion ratio increases from 7.0 to 19.6, α-Mg grains are more sufficiently dynamic recrystallized, achieving the finer and more uniform microstructure as well as the improved comprehensive properties. The alloy with extrusion ratio of 19.6 exhibits the ultimate tensile strength of 228 MPa, tensile yield strength of 167 MPa, and elongation of 22.5%. The corrosion rate of the as-extruded alloys in 3% (mass fraction) KCl is much lower than that of the as-cast alloy.

 

Key words: magnesium alloys; extrusion ratio; mechanical properties; corrosion performance

中南大学学报(自然科学版)
  ISSN 1672-7207
CN 43-1426/N
ZDXZAC
中南大学学报(英文版)
  ISSN 2095-2899
CN 43-1516/TB
JCSTFT
版权所有:《中南大学学报(自然科学版、英文版)》编辑部
地 址:湖南省长沙市中南大学 邮编: 410083
电 话: 0731-88879765(中) 88836963(英) 传真: 0731-88877727
电子邮箱:zngdxb@csu.edu.cn 湘ICP备09001153号