全部 标题 作者
关键词 摘要

OALib Journal期刊
ISSN: 2333-9721
费用:99美元

查看量下载量

相关文章

更多...
材料工程  2014 

热压形变参数对AZ31镁合金接头微观组织和力学性能的影响

DOI: 10.11868/j.issn.1001-4381.2014.06.007, PP. 35-39

Keywords: AZ31镁合金,热压形变,焊接接头,显微组织

Full-Text   Cite this paper   Add to My Lib

Abstract:

采用与母材同质的焊丝对AZ31镁合金板材进行手工钨极氩弧焊,利用真空热压炉及专门设计的夹装模具对焊接接头分别在250,300,350,400℃,应变速率为0.001s-1进行真空热压试验,通过电子拉伸试验仪、光学显微镜(OM)及扫描电镜(SEM)技术,研究镁合金焊接接头的力学性能和组织演化规律。结果表明随着热压温度的升高,接头抗拉强度和伸长率不断增大,在350℃时,接头表现出最大的抗拉强度228MPa和伸长率10.2%,400℃时,强度和伸长率有所降低。在该工艺过程中,随着变形温度的升高,接头组织再结晶现象越来越明显,350℃时出现较多的动态再结晶核心和再结晶小晶粒,平均晶粒尺寸由46μm细化至16μm左右,随着温度的升高,动态再结晶晶粒数量逐渐增加,400℃时,晶粒尺寸有所长大,平均晶粒尺寸为26μm,分布较均匀。

References

[1]  刘楚明, 刘子娟, 朱秀荣, 等. 镁及镁合金动态再结晶研究进展[J]. 中国有色金属学报, 2006, 16(1): 1-12. LIU Chu-ming, LIU Zi-juan, ZHU Xiu-rong, et al. Research and development progress of dynamic recrystallization in pure magnesium and its alloys[J]. The Chinese Journal of Nonferrous Metals, 2006, 16(1): 1-12.
[2]  武婧亭, 游国强, 郭强, 等. AZ71镁合金TIG焊焊接接头微观组织与力学性能[J]. 热加工工艺, 2011, (1):117-118.WU Jing-ting, YOU Guo-qiang, GUO Qiang, et al. Microstructure and mechanical properties of joints of AZ71 alloy by TIG welding[J]. Hot Working Technology, 2011, (1):117-118.
[3]  冯吉才, 王亚荣, 张忠典. 镁合金焊接技术的研究现状及应用[J]. 中国有色金属学报, 2005, 15(2): 165-178.FENG Ji-cai, WANG Ya-rong, ZHANG Zhong-dian. Status and expectation of research on welding of magnesium alloy[J]. The Chinese Journal of Nonferrous Metals, 2005, 15(2): 165-178.
[4]  MORDIKE B L, EBERT T. Magnesium properties applications potential[J]. Materials Science and Engineering: A, 2001, 302 (1): 37-45.
[5]  杨林, 黄婷, 林立, 等. 室温压缩AZ91镁合金显微组织及β-Mg17Al12相析出动力学[J]. 材料工程, 2012, (4): 68-71.YANG Lin, HUANG Ting, LIN Li, et al. Microstructure and precipitation kinetics of β-Mg17Al12 phase in AZ91 alloy compressed at room temperature[J]. Journal of Materials Engineering, 2012, (4): 68-71.
[6]  马力, 龙伟民, 乔培新, 等. Zn-Mg钎料钎焊镁合金AZ31B的显微组织与力学性能[J]. 焊接学报, 2011, (7): 59-62.MA Li, LONG Wei-min, QIAO Pei-xin, et al. Microstructure and mechanical properties of magnesium alloy AZ31B solder joint using Zn-Mg filler metal[J]. Transactions of the China Welding Institution, 2011, (7): 59-62.
[7]  谭兵, 陈东高, 高明, 等. AZ31B变形镁合金激光-MIG复合焊焊接组织和性能分析[J]. 航空材料学报, 2008, 28(6): 36-41.TAN Bing, CHEN Dong-gao, GAO Ming, et al. Microstructure and properties of welding joints for laser-MIG welding of AZ31B transformative magnesium[J]. Journal of Aeronautical Materials, 2008, 28(6): 36-41.
[8]  罗君, 刘政军, 苏允海, 等. 纵向直流磁场对AZ31镁合金TIG焊焊接接头组织及性能的影响[J]. 焊接学报, 2007, (7): 53-59. LUO Jun, LIU Zheng-jun, SU Yun-hai, et al. Influence of longitudinal direct current magnetic field on microstructure and property of AZ31 magnesium alloy TIG welded joint[J]. Transactions of the China Welding Institution, 2007, (7): 53-59.
[9]  MUNITZ A, COTLER C. Electron beam welding of magnesium AZ91D plates[J]. Welding Journal, 2000, 79(7): 202-208.
[10]  GUENTHER S, ARMANDO J. Electron beam process delivers consistent welds[J]. Welding Journal, 2001, 80(6): 53-57.
[11]  詹美燕, 李春明, 张卫文. 累积叠轧焊AZ31镁合金微观组织和织构演变的EBSD研究[J]. 金属学报, 2012, 48(6): 709-716. ZHAN Mei-yan, LI Chun-ming, ZHANG Wei-wen. An EBSD study on the microstructure and texture evolution of AZ31 magnesium alloy during accumulative roll-bonding[J]. Acta Metallurgica Sinica, 2012, 48(6): 709-716.
[12]  WANG Hong-ying, LI Zhi-jun. Effect of filler wire on the joint properties of AZ31 magnesium alloys using CO2 laser welding[J]. China Welding, 2007, 16(2): 16-21.
[13]  LEE W B, YEON Y M, JUNG S B. Joint properties of friction stir welded AZ31B-H24 magnesium alloy[J]. Materials Science and Technology, 2003, 19(6): 785-790.
[14]  中国国家标准化管理委员会. 焊接接头机械性能试验取样方法[M].2版.北京: 中国标准出版社, 1989.
[15]  游国强, 张均成, 王向杰, 等. 压铸态AZ91D镁合金搅拌摩擦焊接头微观组织研究[J]. 材料工程, 2012, (5): 54-58. YOU Guo-qiang, ZHANG Jun-cheng, WANG Xiang-jie, et al. Microstructure of FSW joint of die-casting AZ91D magnesium alloy[J]. Journal of Materials Engineering, 2012, (5): 54-58.
[16]  杨续跃, 张雷. 镁合金温变形过程中的孪生及孪晶交叉[J]. 金属学报, 2009, 45(11): 1303-1308. YANG Xu-yue, ZHANG Lei. Twinning and twin intersection in AZ31 Mg alloy during warm deformation[J]. Acta Metallurgica Sinica, 2009, 45(11): 1303-1308.

Full-Text

Contact Us

service@oalib.com

QQ:3279437679

WhatsApp +8615387084133