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钛合金激光焊接头的损伤行为

Damage Behavior and Mechanism of Laser Welding

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摘要

针对航空工业应用广泛的BT20钛合金, 主要研究其激光焊接头的损伤行为和机理。在对钛合金激光焊接头组织和性能不均匀性分析的基础上, 采用SEM原位观察的方法对激光焊接头的塑性损伤行为进行研究, 从细观上揭示焊接接头的损伤演化与断裂机理。试验发现:焊缝的损伤形式为微裂纹在切应力与正应力共同作用下沿滑移带萌生, 在裂纹前端滑移带相交处, 应力集中会引发新的微裂纹, 并随后与主裂纹相连, 从而导致裂纹的“Z”字型扩展。

Abstract

The damage behavior and mechanism of BT20 titanium laser welding, which is commonly used in aviation industry, was studied by SEM in situ observation to reveal the welding's damage evolution and mechanism from the details, based on the analysis of uneven distribution of titanium welding's structure and properties. Results show that: the form of weld damage is microcrackes and generate at slip band under shear stress and normal stress. Stress concentrate at the intersection of crack front and slip bands, cause new microcracks and then connected to the main crack. This lead to the crack's "Z" shaped extension.

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收稿日期:2010-09-30

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网络出版日期:0001-01-01

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巩水利:高能束流加工技术重点实验室 北京航空制造工程研究所, 北京 100024
李晋炜:高能束流加工技术重点实验室 北京航空制造工程研究所, 北京 100024
吴冰:高能束流加工技术重点实验室 北京航空制造工程研究所, 北京 100024

【1】C. Cam, S. Erim, C. Yeni, et al.Determination of mechanical and fracture properties of laser beam welded steel joints[J]. Welding Journal , 1999, 6:193-201.

【2】J. Besson, W. Brocks, O. Chabanet, et al. Ductile rupture of aluminum sheet materials, Euromech17.

【3】T. Emerson. Ductile fracture mechanics:modeling, experimental and computational simulation[D].U.S.: University of California, 2002.

【4】X.Y. Li, Q. Hao, Y.W. Shi, et al.Influence of mechanical mismatching on the failuer of welded joints by void nucleation and coalescence[J].International Journal of Pressure Vessels and Piping, 2003, 80:647-654.

【5】Yaowu Shi, Fei Zhong, Xiaoyan Li, et al.Effect of laser beam welding on fracture toughness of a Ti-6.5Al-2Zr-1Mo-1V alloy sheet[J].J. Mater. Sci.,2007.

引用该论文

Gong Shuili,Li Jinwei,Wu Bing. Damage Behavior and Mechanism of Laser Welding[J]. APPLIED LASER, 2011, 31(1): 39-44

巩水利,李晋炜,吴冰. 钛合金激光焊接头的损伤行为[J]. 应用激光, 2011, 31(1): 39-44

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