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JIANG Xunyan, CHEN Yiping, WANG Ming, CHENG Donghai. Investigation on microstructural homogeneity in laser beam welding joint superplastic deformation[J]. TRANSACTIONS OF THE CHINA WELDING INSTITUTION, 2017, 38(8): 28-32. DOI: 10.12073/j.hjxb.20150904002
Citation: JIANG Xunyan, CHEN Yiping, WANG Ming, CHENG Donghai. Investigation on microstructural homogeneity in laser beam welding joint superplastic deformation[J]. TRANSACTIONS OF THE CHINA WELDING INSTITUTION, 2017, 38(8): 28-32. DOI: 10.12073/j.hjxb.20150904002

Investigation on microstructural homogeneity in laser beam welding joint superplastic deformation

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  • Received Date: September 03, 2015
  • In this paper, TC4 alloy is welded by laser beam welding. Through the technology of hydrogenation treatment to analyze the structural homogeneity of the welding joint superplastic deformation .The effect of different hydrogen content on the deformation uniformity and deformation uniformity of TC4 titanium alloy laser welding joint was studied. The coefficient structural inhomogeneity of deformation is adopted to express the microstructural homogeneity. The test shows that with the technology of hydrogenation treatment, the phase composition is able to be adjusted and the homogeneity of the welding joint superplastic deformation is able to improved. With increasing hydrogen content, the coefficient structural homogeneity is decreased and the structural becomes more evenly. With the same hydrogen content, the decrease deformation temperature and the reduce initial strain rate both can improve the level of structural homogeneity. With the hydrogen content(1.30% H), the deformation temperature(920 ℃), and the initial strain rate(1×10-4 s-1), the coefficient microstructural homogeneity runs up to 95%.
  • 程东海, 黄继华, 杨 静, 等. TC4钛合金激光焊接接头超塑性变形力学行为研究[J]. 稀有金属材料与工程, 2010, 39(2): 277-280. Cheng Donghai, Huang Jihua, Yang Jing,etal. Superplastic deformation mechanical behavior of laser welded joints of TC4 titanium alloys[J]. Rard Metalmaterials and Engineering, 2010, 39(2): 277-280.[2] 程东海, 陈益平, 胡德安, 等. TC4钛合金激光焊对接接头超塑变形显微组织[J]. 焊接学报, 2011, 32(9): 81-84. Cheng Donghai, Chen Yiping, Hu Dean,etal. Microstrucutre analysis of superplastic deformation on laser butt weld Ti-6Al-4V joint[J]. Transations of the China Welding Institution, 2011, 32(9): 81-84.[3] 程东海, 黄继华, 陈益平, 等. 激光焊接头超塑变形组织表征[J]. 焊接学报, 2012, 33(7): 89-92. Cheng Donghai, Huang Jihua, Chen Yiping,etal. Microstructure evolution characterization of superplastic deformation of titanium alloy[J]. Transations of the China Welding Institution. 2012, 33(7): 89-92.[4] 郭 隆, 白秉哲, 侯红亮. 置氢Ti-6Al-4V钛合金超塑性研究[J]. 稀有金属, 2009, 33(4): 467-471. Guo Long, Bai Bingzhe, Hou Hongliang.Superplasticity of Ti-6Al-4V alloy processed by hydrogenation[J]. Chinese Journal of RaremetlasI, 2009, 33(4): 467-471.[5] 姚 伟, 巩水利. 激光焊接对SPF/DBTi-6Al-4V合金疲劳性能的影响[J]. 焊接学报, 2009, 30(2): 149-152. Yao Wei, Gong Shuili. Influences of laser welding on fatigue propertis of SPF/DB Ti-6A1-4V alloy laser welding[J]. Transations of the China Welding Institution. 2009, 30(2): 149-152.
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