对2219-T6铝合金进行搅拌摩擦焊接(FSW),并采用三点弯曲试验方法评价接头的弯曲性能和用扫描电镜观察接头的弯曲断口形貌。结果表明:正弯时拉应力作用于FSW焊缝上表面,压应力作用于下表面,表现出较好的塑性变形;背弯时受力相反,下表面...对2219-T6铝合金进行搅拌摩擦焊接(FSW),并采用三点弯曲试验方法评价接头的弯曲性能和用扫描电镜观察接头的弯曲断口形貌。结果表明:正弯时拉应力作用于FSW焊缝上表面,压应力作用于下表面,表现出较好的塑性变形;背弯时受力相反,下表面中心线出现裂纹并沿焊核区与热机影响区之间的过渡区扩展。无缺陷FSW接头的最大弯曲力Fbb和抗弯强度σbb最大值分别为3.6 k N、503 MPa,以韧性断裂方式为主;而有缺陷FSW接头的Fbb和σbb分别仅为2.5 k N、395 MPa,以准解理断裂方式为主。展开更多
基金Project (51405392) supported by the National Natural Science Foundation of ChinaProject (2019T120954) supported by the China Postdoctoral Science Foundation+1 种基金Project (3102019MS0404) supported by Fundamental Research Funds for the Central Universities, ChinaProject (2018BSHQYXMZZ31) supported by the Postdoctoral Science Foundation of Shaanxi Province, China。
基金Project(51405392)supported by the National Natural Science Foundation of ChinaProject(2019T120954)supported by the China Postdoctoral Science Foundation+1 种基金Project(2018BSHQYXMZZ31)supported by the Shaanxi Provincial Postdoctoral Science Foundation,ChinaProject(3102019MS0404)supported by the Fundamental Research Funds for the Central Universities,China.
基金Project(51405392)supported by the National Natural Science Foundation of ChinaProject(20136102120022)supported by the Research Fund for the Doctoral Program of Higher Education of ChinaProject(3102015ZY023)supported by the Fundamental Research Funds for the Central Universities,China
基金Project(51405392)supported by the National Natural Science Foundation of ChinaProject(20136102120022)supported by the Research Fund for the Doctoral Program of Higher Education of China+1 种基金Project(2013JQ6001)supported by the Natural Science Foundation of Shaanxi Province,ChinaProject(3102015ZY023)supported by the Fundamental Research Funds for the Central Universities,China
文摘对2219-T6铝合金进行搅拌摩擦焊接(FSW),并采用三点弯曲试验方法评价接头的弯曲性能和用扫描电镜观察接头的弯曲断口形貌。结果表明:正弯时拉应力作用于FSW焊缝上表面,压应力作用于下表面,表现出较好的塑性变形;背弯时受力相反,下表面中心线出现裂纹并沿焊核区与热机影响区之间的过渡区扩展。无缺陷FSW接头的最大弯曲力Fbb和抗弯强度σbb最大值分别为3.6 k N、503 MPa,以韧性断裂方式为主;而有缺陷FSW接头的Fbb和σbb分别仅为2.5 k N、395 MPa,以准解理断裂方式为主。