网站首页期刊简介编委会过刊目录投稿指南广告合作征订与发行联系我们English
高应变速率多向锻造对AZ31镁合金组织及耐腐蚀性能的影响
英文标题:Influence of high strain rate multi-directional forging on microstructure and corrosion resistance property for AZ31 magnesium alloy
作者:邓彬 李庆芬 吴远志 刘超 叶拓   刘伟 马斌 刘安民 
单位:湖南工学院 
关键词:AZ31镁合金 高应变速率多向锻造 累积应变量 再结晶晶粒 耐腐蚀性能 
分类号:TG132.25
出版年,卷(期):页码:2021,46(8):7-11
摘要:

 对均匀化处理后AZ31镁合金进行高应变速率多向锻造,使用金相显微镜(OM)与电子背散射衍射仪(EBSD)等测试手段研究了不同累积应变量对AZ31镁合金显微组织的影响;采用电化学测试等方法研究不同累积应变量对合金在质量分数为3.5%的NaCl溶液中的腐蚀行为。实验结果表明:相对于锻造前,高应变速率多向锻造后,合金平均晶粒尺寸大幅度减小、耐腐蚀性能提升。当累积应变量为1.32时,合金获得了均匀细小的晶粒组织,其平均晶粒度为7.8218 μm,再结晶比例分数为79.40683%,平均腐蚀速率Vi=0.072 mm·a-1,合金耐腐蚀性能最优;当累积应变量大于1.32时,在自激活的作用下,引起了再结晶晶粒的长大,合金的再结晶程度与组织的均匀性下降,耐腐蚀性能降低。

 The AZ31 magnesium alloy after homogenization treatment was subjected to high strain rate multi-directional forging, and the influences of different cumulative strains on the microstructure of AZ31 magnesium alloy were studied by the testing methods such as optical microscope (OM) and electron backscatter diffractometer (EBSD). Then, the corrosion behavior of alloy in NaCl solution with the mass fraction of 3.5% under different cumulative strains was studied by electrochemical tests and other methods. The experiment results show that compared with before forging, the average grain size of alloy after high strain rate multi-directional forging is greatly reduced and the corrosion resistance property is improved. When the cumulative strain is 1.32,the alloy has a uniform and fine grain structure with the average grain size of 7.8218 μm,the recrystallization fraction is 79.40683%,the average corrosion rate is Vi= 0.072 mm·a-1,the corrosion resistance property of alloy is the best. However, when the cumulative strain is beyond 1.32,the recrystallized grains grow up due to the action of self-activation,and the recrystallization degree and microstructure uniformity of alloy decrease as well as the corrosion resistance  property.

基金项目:
湖南省自然科学基金资助项目(2019JJ30009);湖南省教育厅科学研究项目(20C0567,19C0508);衡阳市科技计划项目基础研究专项(202002042096)
作者简介:
邓彬(1981-),男,硕士,实验师 E-mail:76559886@qq.com 通信作者:吴远志(1984-),男,博士,教授 E-mail:2911065882@qq.com
参考文献:

[1]卢立伟, 盛坤,伍贤鹏,等. 镁合金挤压变形工艺的研究进展
[J]. 锻压技术,2019,44 (1):1-9.

 

Lu L W,Sheng K,Wu X P,et al. Research progress of extrusionprocess for magnesium alloy
[J]. Forging & Stamping Technology,2019,44 (1):1-9.

 


[2]丁文江, 吴玉娟,彭立明,等. 高性能镁合金研究及应用的新进展
[J]. 中国材料进展,2010,29(8):37-45.

 

Ding W J,Wu Y J,Peng L M,et al.Research and application development of advanced magnesium alloys
[J]. Materials China,2010,29(8):37-45.

 


[3]郝孟军,宫涛,代艳霞. 汽车轮毂用改性镁合金锻造工艺
[J]. 锻压技术,2019 ,44(4):22-27.

 

Hao M J,Gong T,Dai Y X. Modified magnesium alloy forging process for automobile hub
[J]. Forging & Stamping Technology,2019 ,44(4):22-27.

 


[4]李有新,娄振洋,李小辉. 热机械加工对EW75镁合金组织与性能的影响
[J]. 锻压技术,2020 ,45(4):177-183.

 

Li Y X,Lou Z Y,Li X H. Effect of thermomechanical process on microstructure and properties for EW75 magnesium alloy
[J]. Forging & Stamping Technology,2020 ,45(4): 177-183.

 


[5]Esmaily M,Svensson J E,Fajardo S,et al. Fundamentals and advances in magnesium alloy corrosion
[J]. Progress in Materials Science,2017,89:92-193.

 


[6]Orlov D,Ralston K D,Birbilis N,et al. Enhanced corrosion resistance of Mg alloy ZK60 after processing by integrated extrusion and equal channel angular pressing
[J]. Acta Materialia,2011,59(15):6176-6186.

 


[7]刘玉项. 合金化对镁电化学腐蚀速率影响的研究进展
[J].稀有金属材料与工程,2021,50(1):361-372.

 

Liu Y X. Research progress in effect of alloying on electrochemical corrosion rates of Mg alloys
[J]. Rare Metal Materials and Engineering,2021,50(1):361-372.



[8]Hoog C,Birbilis N,Estrin Y. Corrosion of pure Mg as a function of grain size and processing route
[J]. Advanced Engineering Materials,2008,10(6):579-582.

 

 


[9]吴远志, 严红革,朱素琴,等. Mg-Zn-Zr 合金高应变速率多向锻造组织演变及力学性能
[J]. 材料研究学报,2014,28(2):144-152.

 

Wu Y Z,Yan H G,Zhu S Q,et al. Microstruture evolution and mechanical properties of Mg-Zn-Zr alloy during high strain rate triaxial-forging
[J]. Chinese Journal of Materias Research,2014,28(2): 144-152.

 


[10]Bakhsheshi-Rad H R, Abdul-Kadir M R, Idris M H, et al. Relationship between the corrosion behavior and the thermal characteristics and microstructure of Mg-0.5Ca-xZn alloys
[J]. Corrosion Science, 2012, 64: 184.

 


[11]姚怀, 文九巴,熊毅,等. 挤压温度对固溶态Mg-2.0Zn-0.5Zr-3.0Gd合金微观组织及耐腐蚀性能的影响
[J]. 稀有金属材料与工程,2019, 48(6):270-277.

 

Yao H,Wen J B,Xiong Y,et al. Effect of the extrusion temperature on microstructure and corrosion resistance of solution-treated Mg-2.0Zn-0.5Zr-3.0Gd alloy
[J]. Rare Metal Materials and Engineering,2019,48(6): 270-277.

 


[12]Zhou Q W,Zheng Z J,Gao Y. Abnormal selective dissolution by the partial recrystallization in a plastically deformed austenitic stainless steel
[J]. Corrosion Science,2021,118:1-11.

服务与反馈:
本网站尚未开通全文下载服务】【加入收藏
《锻压技术》编辑部版权所有

中国机械工业联合会主管 北京机电研究所有限公司 中国机械工程学会塑性工程分会主办
联系地址:北京市海淀区学清路18号 邮编:100083
电话:+86-010-62920652 +86-010-82415085 传真:+86-010-62920652
E-mail: fst@263.net(稿件) dyjsjournal@163.com(广告)
京ICP备09032115号-5