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CHENG Donghai, HUANG Jihua, LIN Haifan, ZHANG Hua. Microstructure and mechanical analysis of Ti-6Al-4V laser butt weld joint[J]. TRANSACTIONS OF THE CHINA WELDING INSTITUTION, 2009, (2): 103-106.
Citation: CHENG Donghai, HUANG Jihua, LIN Haifan, ZHANG Hua. Microstructure and mechanical analysis of Ti-6Al-4V laser butt weld joint[J]. TRANSACTIONS OF THE CHINA WELDING INSTITUTION, 2009, (2): 103-106.
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Microstructure and mechanical analysis of Ti-6Al-4V laser butt weld joint

  • College of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083, China

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  • Received Date: July 04, 2008
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  • Microstructures and mechanical properties of Ti-6Al-4V laser butt weld joints were investigated.The results reveal that the microstructure of laser welded joints consists of coarse columnar crystals.The martensite in columnar crystals crosses like basket shape.Microstructure of HAZ consists of α+β+α', and distributs non-uniformed, the closer to fusion zone the coarser grains and the more martensite.The suitable welding parameters for 0.8 mm thick Ti-6Al-4V alloy are 1 100-1 300 W and 1.5-3.0 m/min.The mechanical property of weld bead is good, all the tensile specimens fails at base metal away from weld bead, the pattern of fracture shows dimple fracture character.
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