王翔宇,巩水利,杨 璟,芦 伟,单飞虎. TC4 钛合金激光窄间隙焊接工艺与组织特征研究[J]. 航空制造技术, 2016, 59(23/24): 104-107. WANG Xiangyu, GONG Shuili, YANG Jing, LU Wei, SHAN Feihu. Narrow-gap|TC4 titanium alloy|Laser welding|Microstructure|Microhardness. Aeronautical Manufacturing Technology, 2016, 59(23/24): 104-107.
WANG Xiangyu, GONG Shuili, YANG Jing. Narrow-gap|TC4 titanium alloy|Laser welding|Microstructure|Microhardness[J]. Aeronautical Manufacturing Technology, 2016, 59(23/24).
王翔宇,巩水利,杨 璟,芦 伟,单飞虎. TC4 钛合金激光窄间隙焊接工艺与组织特征研究[J]. 航空制造技术, 2016, 59(23/24): 104-107. WANG Xiangyu, GONG Shuili, YANG Jing, LU Wei, SHAN Feihu. Narrow-gap|TC4 titanium alloy|Laser welding|Microstructure|Microhardness. Aeronautical Manufacturing Technology, 2016, 59(23/24): 104-107. DOI: 10.16080/j.issn1671-833x.2016.23/24.104.
WANG Xiangyu, GONG Shuili, YANG Jing. Narrow-gap|TC4 titanium alloy|Laser welding|Microstructure|Microhardness[J]. Aeronautical Manufacturing Technology, 2016, 59(23/24). DOI: 10.16080/j.issn1671-833x.2016.23/24.104.
The IPG YLS-5000 multi-mode fiber laser is used for the 12mm thick TC4 plate by the multiple-pass narrow-gap approach. Optimized process parameters are attained
as well as the microstructure in laser beam welds of TC4 titanium alloy is investigated. The result shows that incomplete fusion and porosity could be reduced using the optimized welding parameters. The microstructure of the base metal (BM) is typical equiaxed structure. The microstructure of fusion zone (FZ) is composed of β columnar crystal and basket weave martensite α′ phase. The grain size of heat affected zone (HAZ) is obviously refined. The HAZ partially transformed is made up of martensite α′ phase
transformed α and transformed β. Moreover
the microhardness of weld metal and heat affected zone is higher than that of base metal
and the hardness reaches to peak value in the heat affect zone near weld metal.