Effect of grain size and residual stress on the corrosion resistance of friction stir spot welded AZ31B joints

被引：23
作者：
Savguira, Y. [1 ]
North, T. H. [1 ]
Thorpe, S. J. [1 ]
机构：
[1] Univ Toronto, Dept Mat Sci & Engn, 184 Coll St,Rm 140, Toronto, ON M5S 3E4, Canada
来源：
MATERIALS AND CORROSION-WERKSTOFFE UND KORROSION | 2016年 / 67卷 / 10期
基金：
加拿大自然科学与工程研究理事会;
关键词：
grain size; magnesium; polarization; residual stress; welding; PROCESSED MAGNESIUM ALLOY; MG-ALLOY; MECHANICAL-PROPERTIES; LOCALIZED CORROSION; MASS-LOSS; MICROSTRUCTURE; BEHAVIOR; SURFACE; ORIENTATION; IMPEDANCE;
D O I：
10.1002/maco.201608925
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Localized corrosion at the weld periphery of AZ31B friction stir spot welds has been associated with the formation of a galvanic cell between the stir zone material and the adjacent base metal. However, this explanation did not take into account the effects of residual stress and grain growth in material adjacent to the stir zone region. In this study, the influence of microstructural changes on the electrochemical characteristics of FSSW joints is investigated using a combination of microcapillary polarization, stress relief heat-treatment and micro-hardness testing. It is confirmed that residual stress has no significant effect on the corrosion resistance properties of completed joints. Also, based on a detailed examination of the electrochemical characteristics of materials in the stir zone, TMAZ and HAZ regions, grain growth had negligible influence on the corrosion resistance properties.
引用
收藏
页码：1068 / 1074
页数：7
相关论文
共 42 条
[31]   The surface, microstructure and corrosion of magnesium alloy AZ31 sheet [J].
Song, Guang-Ling ;
Xu, ZhenQing .
ELECTROCHIMICA ACTA, 2010, 55 (13) :4148-4161
[32]   Tool design and stir zone grain size in AZ31 friction stir spot welds [J].
Sun, N. ;
Yin, Y. H. ;
Gerlich, A. P. ;
North, T. H. .
SCIENCE AND TECHNOLOGY OF WELDING AND JOINING, 2009, 14 (08) :747-752
[33]   Microelectrodes for corrosion studies in microsystems [J].
Suter, T ;
Böhni, H .
ELECTROCHIMICA ACTA, 2001, 47 (1-2) :191-199
[34]   Microstructure, texture and residual stress in a friction-stir-processed AZ31B magnesium alloy [J].
Woo, W. ;
Choo, H. ;
Prime, M. B. ;
Feng, Z. ;
Clausen, B. .
ACTA MATERIALIA, 2008, 56 (08) :1701-1711
[35]   Residual strain measurements in a friction-stir processed AZ31B magnesium alloy using neutron diffraction [J].
Woo, W. ;
Choo, H. ;
Brown, D. W. ;
Clausen, B. ;
Feng, Z. ;
Liaw, P. K. .
THERMEC 2006, PTS 1-5, 2007, 539-543 :3795-+
[36]   Microstructure and Texture Evolution during Friction Stir Processing of AZ31 Mg Alloy [J].
Xin, Renlong ;
Li, Bo ;
Liu, Qing .
PRICM 7, PTS 1-3, 2010, 654-656 :1195-1200
[37]   Liquid Penetration Induced cracking in Mg-alloy spot welds [J].
Yamamoto, M. ;
Gerlich, A. ;
North, T. H. ;
Shinozaki, K. .
ADVANCED WELDING AND MICRO JOINING / PACKAGING FOR THE 21ST CENTURY, 2008, 580-582 :409-+
[38]   Hook formation and mechanical properties in AZ31 friction stir spot welds [J].
Yin, Y. H. ;
Sun, N. ;
North, T. H. ;
Hu, S. S. .
JOURNAL OF MATERIALS PROCESSING TECHNOLOGY, 2010, 210 (14) :2062-2070
[39]   Microstructure and mechanical properties of friction stir welding of AZ31B magnesium alloy added with cerium [J].
Yu Sirong ;
Chen Xianjun ;
Huang Zhiqiu ;
Liu Yaohui .
JOURNAL OF RARE EARTHS, 2010, 28 (02) :316-320
[40]  
Zhang X., 2014, MAGNESIUM TECHNOLOGY, P357
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