邹东利,陈向林,肖大武,何立峰,帅茂兵,李玉斌.5A06铝合金激光焊接接头显微组织及力学性能研究[J].稀有金属材料与工程,2019,48(9):2951~2956.[Zou Dongli,Chen Xianglin,Xiao Dawu,He Lifeng,Shuai Maobing,Li Yubin.Microstructure and mechanical properties of 5A06 aluminium alloy laser welded joint[J].Rare Metal Materials and Engineering,2019,48(9):2951~2956.]
5A06铝合金激光焊接接头显微组织及力学性能研究
投稿时间:2018-04-17??修订日期:2018-06-05
中文关键词:??铝合金??激光焊接??显微组织??力学性能
基金项目:国家重点研发计划(2016YFB1102104-4),国家自然科学(51401187)
中文摘要:
??????本文研究了30 mm厚5A06铝合金激光焊接接头的显微组织和力学性能。结果表明焊缝区存在一定数量的气孔缺陷,缺陷主要位于晶界处,统计表明尺寸小于100 μm的焊接缺陷占比超过50%;焊缝区显微组织由枝状晶组成,单个晶粒内包含多支枝状晶团簇,枝晶间累积取向差小于5o,枝晶间衬度的差异由Mg元素偏析造成;焊缝区与热影响区之间界面明显,热影响区晶粒内小角晶界的含量明显高于焊缝区,且两区域晶粒形貌、尺寸存在明显差异。显微硬度测试表明焊缝内显微硬度值存在一定波动,总体上可达到基材显微硬度值的90%以上。
Microstructure and mechanical properties of 5A06 aluminium alloy laser welded joint
英文关键词:aluminium alloy??laser welding??microstructure??mechanical property
英文摘要:
??????The microstructure and mechanical properties of 5A06 aluminium alloy laser welded joint with thickness of 30 mm were investigated in this paper. The experimental results show that an amount of pore defects were found in weld seam zone, and the welded defects were mainly located at the grain boundary. The proportion of the welded defects with size less than 100 μm was beyond 50%. The microstructure in weld seam zone was mainly composed of dendritic grians, and several dendritic grians were located in a single grains. The misorientation between the dendritic grians was less than 5o, and the contrast between the dendritic grians was caused by element Mg microsegregation. The obvious interface was observed between the weld seam zone and heat-affected zone, and the contents of low angle boundary in heat-affected zone were higher than that of weld seam zone. Meanwhile, the grain morphology and size in heat-affected zone were different from the weld seam zone. Microhardness measurement shows that the definitive fluctuation of microhardness values in weld seam zone was observed, and the microhardness values of weld seam zone were beyond that of the microhardness values of matrx.
作者单位E-mail
邹东利?中国工程物理亚洲AG手机|开户材料研究所?donglizou@126.com?
陈向林?中国工程物理亚洲AG手机|开户材料研究所??
肖大武?中国工程物理亚洲AG手机|开户材料研究所??
何立峰?中国工程物理亚洲AG手机|开户材料研究所??
帅茂兵?中国工程物理亚洲AG手机|开户材料研究所??
李玉斌?中国工程物理亚洲AG手机|开户材料研究所??
摘要点击次数:?65
全文下载次数:?25
查看全文??查看/发表评论??
关闭