文章摘要
叶俊华,汤爱涛,马仕达,陈巧旺,王玉容,徐安莲.搅拌摩擦焊接Mg-6Al-1Sn合金组织与性能研究[J].材料导报,2017,31(22):79-84
搅拌摩擦焊接Mg-6Al-1Sn合金组织与性能研究
Microstructure and Properties of Mg-6Al-1Sn Alloy by Friction Stir Welding
  
DOI：10.11896/j.issn.1005-023X.2017.022.016
中文关键词: AT61镁合金 搅拌摩擦焊 组织 性能
英文关键词: AT61 magnesium alloy, friction stir welding, microstructure, properties
基金项目:国家重点研发项目(2016YFB0301101);国家自然科学基金(51474043);重庆市教委科技成果转化项目(KJZH14101)
作者单位E-mail
叶俊华 重庆大学材料科学与工程学院,重庆 400045 20140902082@cqu.edu.cn 
汤爱涛 重庆大学材料科学与工程学院,重庆 400045
重庆大学国家镁合金材料工程技术研究中心,重庆 400044 		20140902082@cqu.edu.cn 
马仕达 重庆大学材料科学与工程学院,重庆 400045  
陈巧旺 重庆大学材料科学与工程学院,重庆 400045  
王玉容 重庆大学材料科学与工程学院,重庆 400045  
徐安莲 重庆大学材料科学与工程学院,重庆 400045  
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中文摘要:
      对搅拌摩擦焊Mg-6Al-1Sn (AT61)合金板材在不同的焊接工艺参数下的组织与性能进行了研究。研究结果表明,在旋转速度为 1 200 r/min时,焊接速度为60~180 mm/min及焊速为180 mm/min时,转速为1 200~1 600 r/min范围内都能实现良好连接,接头最大抗拉强度系数达到母材的88%,且焊核区的析氢速率低于母材,但电化学性能有所降低。母材中的第二相是Al8Mn5, 没有检测到Mg2Sn相,在不同焊接工艺参数下接头组织与母材相比,第二相的类型不变,第二相的分布由条状变为颗粒状。
英文摘要:
      Mg-6Al-1Sn (AT61) magnesium alloy plates were successfully friction stir welded (FSW). The effect of different parameters on microstructure and properties were investigated. The results showed that the sound welded joints were obtained at the constant rotational rate of 1 200 r/min when the welding speed ranged from 60—180 mm/min and at the constant welding speed of 180 mm/min when the rotational rates ranged from 1 200—1 600 r/min, the best joint efficiency (i.e., a ratio of the UTS of joint to the UTS of BM) was 88%, and the hydrogen rate in nugget zone (NZ) was lower than base material (BM), but the electrochemistry performance was reduced. It was found that only Al8Mn5 phase was observed in BM, no Mg2Sn phase was detected. Compared with BM in microstructure, the type of secondary precipitates were insensitive to different welding parameters, and the distribution of secondary precipitates were transformed from strips into particles.
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