| Al-Cu-Li合金搅拌摩擦焊接头的微观组织和力学性能 |
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| 引用本文： | 王大勇,冯吉才,刘会杰,狄欧.Al-Cu-Li合金搅拌摩擦焊接头的微观组织和力学性能[J].中国有色金属学报,2004,14(1):69-73. |
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| 作者姓名： | 王大勇 冯吉才 刘会杰 狄欧 |
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| 作者单位： | 哈尔滨工业大学,现代焊接生产技术国家重点实验室,哈尔滨,150001 |
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| 基金项目： | 国家高技术研究发展计划(863计划) |
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| 摘 要： | 采用搅拌摩擦焊方法对2mm厚的Al-Cu-Li合金轧制板进行了焊接.接头内形成了焊核区、热机影响区和热影响区.焊核区由细等轴再结晶组织构成;热机影响区内的组织发生较大的弯曲变形,并在热循环的作用下发生了回复反应;热影响区形成了粗大的板条状组织.实验结果表明:在200mm/min的焊接速度下,接头的拉伸强度最高,达到393MPa,断裂形式为韧性和脆性的混合型断裂;在500mm/min的焊接速度下,接头强度为267.7MPa,断裂形式为脆性断裂.
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| 关 键 词： | 搅拌摩擦焊 Al-Cu-Li合金 接头组织 力学性能 |
| 文章编号： | 1004-0609(2004)01-0069-05 |
| 修稿时间： | 2003年3月3日 |
Microstructures and mechanical properties of friction-stir welding joint of Al-Cu-Li alloy |
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| WANG Da-yong,FENG Ji-cai,LIU Hui-jie,DI OuHarbin Institute of Technology,Harbin ,China.Microstructures and mechanical properties of friction-stir welding joint of Al-Cu-Li alloy[J].The Chinese Journal of Nonferrous Metals,2004,14(1):69-73. |
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| Authors: | WANG Da-yong FENG Ji-cai LIU Hui-jie DI OuHarbin Institute of Technology Harbin China |
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| Affiliation: | WANG Da-yong,FENG Ji-cai,LIU Hui-jie,DI OuHarbin Institute of Technology,Harbin 150001,China) |
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| Abstract: | Friction-stir welds of Al-Cu-Li aluminum rolled sheet material in 2mm thickness were completed and the joint microstructures could be divided into there regions, namely, welded nugget zone(WNZ), thermal-mechanically affected zone(TMAZ) and heat affected zone(HAZ). And there are much difference for microstructures among the above three zones: the microstructures within the WNZ, in which dynamic recrystallization occurred, consist of refined, equiaxed grains; those within the TMAZ, in which recovery occurred, consist of highly deformed grains; those within the HAZ consist of coarse lath grains. Mechanical property measurement and fracture analysis demonstrate that the peak tensile strength of the joint is 393MPa at 200mm/min and the fracture mode is ductile/brittle mixed fracture; and at 500mm/min, tensile strength of the joint is 267.7MPa, and the fracture mode is brittle fracture. |
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| Keywords: | friction-stir welding Al-Cu-Li alloy joint microstructures mechanical property |
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