| TC4/TA17异种钛合金激光焊接接头显微组织和力学性能 |
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| 引用本文： | 陈永城,张宇鹏,罗子艺,韩善果,哈斯金·弗拉基斯拉夫.TC4/TA17异种钛合金激光焊接接头显微组织和力学性能[J].电焊机,2017(11):82-86. |
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| 作者姓名： | 陈永城 张宇鹏 罗子艺 韩善果 哈斯金·弗拉基斯拉夫 |
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| 作者单位： | 广东省焊接技术研究所(广东省中乌研究院)广东省现代焊接技术重点实验室,广东广州,510650 |
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| 基金项目： | 广东省引进创新科研团队计划资助项目，广东省科技计划项目，广东省科技计划项目，国合科技项目，广东省科技计划项目 |
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| 摘 要： | 研究TC4/TA17异种钛合金激光焊接接头的显微组织和力学性能。结果表明,TC4/TA17异种钛合金激光焊接头焊缝的显微组织为片状α′马氏体,TC4侧靠近母材的热影响区和TA17侧靠近母材的热影响区只发生α相向β相转变,TC4侧靠近焊缝的显微组织为残余α相+针状α′马氏体,TA17侧靠近焊缝的显微组织为残余α相+片状α′马氏体。TC4/TA17异种钛合金激光焊接头的显微硬度呈不对称分布,焊缝的显微硬度最高,TA17母材显微硬度最低。TC4/TA17异种钛合金激光焊接接头断裂在TA17母材,断口呈现韧性断裂形貌。
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| 关 键 词： | 激光焊接 钛合金 异种接头 显微组织 力学性能 |
Microstructure and mechanical properties of laser welded joints of dissimilar titanium alloy TC4/TA17 |
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| Abstract: | The microstructure and mechanical properties of laser welded joints of dissimilar titanium alloy TC4 and TA17 are researched.The results show that the microstructure of weld consists of α'martensite,and there are only transformation fromα phase to β phase occurring in the heat affected zones close to the base metals on TC4 side and TA17 side.The heat affected zone close to the weld metal on TC4 side is characterized by retained α phase and acicular α'martensite,and on TA17 side is characterized by retained α phase and flake α'martensite.The microhardness of the welded joints distributes asymmetrically,the microhardness of the welds is the highest and the one of TA17 base metal is the lowest.The welded joints of dissimilar titanium alloys TC4/TA15 fracture in the TA17 base metal,and the fracture appears ductile fracture. |
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| Keywords: | laser beam welding titanium alloy dissimilar joint microstructure mechanical properties |
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