| Al-Mg-Mn-Sc-Zr合金板材搅拌摩擦焊和氩弧焊焊接接头的对比 |
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| 引用本文： | 何振波,彭勇宜,尹志民,雷学锋.Al-Mg-Mn-Sc-Zr合金板材搅拌摩擦焊和氩弧焊焊接接头的对比[J].中国有色金属学会会刊,2011,21(8):1685-1691. |
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| 作者姓名： | 何振波 彭勇宜 尹志民 雷学锋 |
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| 作者单位： | 中南大学材料科学与工程学院;东北轻合金有限责任公司;中南大学物理科学与技术学院; |
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| 基金项目： | Project (MKPT-2005-16ZD) supported by the National Key Scientific and Technological Project of China; Project supported by the Postdoctoral Science Foundation of Central South University,China |
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| 摘 要： | 研究Al-Mg-Mn-Sc-Zr合金的焊接工艺和焊接接头组织和性能。采用搅拌摩擦焊（FSW）和氩弧焊（TIG）2种焊接工艺对该合金的热轧和冷轧-退火2种使用态板材进行焊接。采用比较研究的方法测定和研究焊接接头的力学性能和显微组织,利用光学显微镜和透射电子显微镜研究焊缝的显微组织和力学性能之间的关系。结果表明,与基材相比,Al-Mg-Mn-Sc-Zr合金的热轧和冷轧-退火板材的FSW和TIG焊接接头的强度均下降,但FSW焊接系数高于TIG焊接系数。这是因为FSW焊接接头焊核区亚结构强化的丧失和Al3（Sc,Zr）的析出强化作用的极少量丧失,而TIG焊焊接接头的软化主要原因是其形变强化的完全丧失和Al3（Sc,Zr）的析出强化作用的大部分丧失,且搅拌摩擦焊焊核区晶粒比TIG焊的焊缝区晶粒更细小。
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| 关 键 词： | Al-Mg-Mn-Sc-Zr 合金 搅拌摩擦焊 氩弧焊 焊接接头 |
| 收稿时间： | 20 September 2010 |
Comparison of FSW and TIG welded joints in Al-Mg-Mn-Sc-Zr alloy plates |
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| Zhen-bo HE,Yong-yi PENG,Zhi-min YIN,Xue-feng LEI.Comparison of FSW and TIG welded joints in Al-Mg-Mn-Sc-Zr alloy plates[J].Transactions of Nonferrous Metals Society of China,2011,21(8):1685-1691. |
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| Authors: | Zhen-bo HE Yong-yi PENG Zhi-min YIN Xue-feng LEI |
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| Affiliation: | aSchool of Materials Science and Engineering, Central South University, Changsha 410083, China;bNortheast Light Alloy Co. Ltd., Harbin 150060, China;cSchool of Physics Science and Technology, Central South University, Changsha 410083, China |
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| Abstract: | In order to study the welding process, microstructure and properties of Al-Mg-Mn-Sc-Zr alloy, comparative methods of friction stir welding (FSW) and tungsten inert gas (TIG) were applied to the two conditions of this alloy, namely hot rolled plate and cold rolled-annealed plate. The relationships between microstructures and properties of the welded joints were investigated by means of optical microscopy and transmission electron microscopy. Compared with the base metal, the strength of FSW and TIG welded joints decreased, and the FSW welding coefficients were higher than the TIG welding coefficients. The loss of substructure strengthening and a very little loss of precipitation strengthening of Al3(Sc, Zr) cause the decreased strength of FSW welded joint. But for the TIG welded joint, the disappearance of both the strain hardening and most precipitation strengthening effect of Al3(Sc, Zr) particles contributed to its softening. At the same time, the grains in weld nugget zone of FSW welded joints were finer than those in the molten zone of TIG welded joints. |
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| Keywords: | Al-Mg-Mn-Sc-Zr friction stir welding tungsten inert gas welded joints |
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