沈会,王江涛,陈佳伟,谢利,何明涛,王明智,卢雅琳

• 1:江苏理工学院材料工程学院

摘要(Abstract)：

采用光学显微镜(OM)、差示扫描量热仪(DSC)、扫描电镜(SEM)、透射电镜(TEM)以及高温拉伸蠕变装置等研究了7075铝合金搅拌摩擦焊(FSW)接头经T6热处理后的显微组织、析出相以及蠕变性能。结果表明：经T6热处理后，7075铝合金搅拌摩擦焊接头焊核区细小的等轴晶发生长大，重新析出的η′相在数量、尺寸和分布状态均优于未热处理的接头；热处理后焊接头的稳态蠕变速率降低了至少1个数量级，蠕变寿命提高了2倍以上，蠕变机制由晶界扩散控制的位错滑移机制转变为自扩散控制的位错滑移机制。

关键词(KeyWords)： 7075铝合金焊接头;T6热处理;析出相;蠕变

Abstract:

Keywords:

基金项目(Foundation): 江苏省高等学校自然科学基金重大项目(A类)(19KJA460003);江苏省高等学校自然科学基金(20KJB430027);; 江苏省研究生实践创新计划基金项目(SJCX21＿1315);; 国家自然科学基金(51701088)

作者(Author): 沈会,王江涛,陈佳伟,谢利,何明涛,王明智,卢雅琳

DOI: 10.13289/j.issn.1009-6264.2022-0369

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