| 环形结构激光焊接凝固热裂纹的实验研究和数值模拟 |
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| 引用本文： | 温鹏,荻崎贤二,山本元道. 环形结构激光焊接凝固热裂纹的实验研究和数值模拟[J]. 金属学报, 2011, 0(10): 1241-1245 |
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| 作者姓名： | 温鹏 荻崎贤二 山本元道 |
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| 作者单位： | 清华大学机械工程系;广岛大学机械工程系; |
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| 摘 要： | 以激光焊接平面环形结构时,在首尾段重叠焊接部分发生的凝固热裂纹为例,采用实验和数值模拟相结合的手段,从冶金和力学2个方面综合研究了环形焊缝凝固热裂纹的发生机理.对凝固热裂纹附近的微观组织进行观察,并用电子背散射衍射对裂纹附近晶粒尺寸进行测量,发现重叠焊缝中心部位晶粒粗大,而粗大晶粒导致焊缝金属凝固时韧性下降.利用有限元...
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| 关 键 词： | 激光焊接 凝固热裂纹 环形结构 晶粒尺寸 数值模拟 |
EXPERIMENTAL RESEARCH AND NUMERICAL SIMULATION OF SOLIDIFICATION CRACK DURING LASER WELDING OF RING STRUCTURE |
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| WEN Peng Mechanical Engineering Department,Tsinghua University,Beijing Shinozaki Kenji,Yamamoto Motomichi. EXPERIMENTAL RESEARCH AND NUMERICAL SIMULATION OF SOLIDIFICATION CRACK DURING LASER WELDING OF RING STRUCTURE[J]. Acta Metallurgica Sinica, 2011, 0(10): 1241-1245 |
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| Authors: | WEN Peng Mechanical Engineering Department Tsinghua University Beijing Shinozaki Kenji Yamamoto Motomichi |
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| Affiliation: | WEN Peng Mechanical Engineering Department,Tsinghua University,Beijing 10084 Shinozaki Kenji,Yamamoto Motomichi Department of Mechanical Engineering,Hiroshima University,Hiroshima 739-8527,Japan |
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| Abstract: | The combined influence of metallurgical and mechanical factors on welding solidification cracking structure in laser welded ring was investigated by using both experiments and numerical simulation.It is found that solidification cracking is directly related with the overlap weld part.The microstructure was observed under OM,and the grain size was measured by EBSD observation.The grains in overlap weld part are much bigger than those in single weld part,which results in falling of ductility during solidifica... |
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| Keywords: | laser welding solidification crack ring structure grain size numerical simulation |
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