金属加工（热加工）Issue(6)：58-64,7.
TA5钛合金激光焊接头组织与力学性能分析
Microstructure and mechanical properties of TA5 titanium alloy laser welded joint
摘要
Abstract
This article uses laser self-fusion welding method to achieve welding of 10mm thick TA5 titanium alloy,and explores the relationship between the microstructure and mechanical properties of laser welded joint.It has shown that laser self-welding can achieve high-quality welding of TA5 titanium alloy,with continuous and uniform formation of the weld surface,and no obvious defects such as pores,cracks,and inclusions inside;The microstructure of the base metal consists of small and uniform equiaxed α phase and point like intergranular β phase.The center of the weld seam is mainly composed of coarse β columnar crystals,with small cross distributed needle like martensite inside the crystals;The microstructure of the coarse-grained region is mainly composed of primary block shaped α phase and needle shaped martensite α'phase,while the microstructure of the fine-grained region is mainly composed of equiaxed α phase,a small amount of needle shaped martensite α'phase,and residual β phase;Tensile fracture occurs at the base material far from the weld seam,which is directly related to the formation of needle like martensite,with an average tensile strength of 783MPa;The microhardness of the laser welded joint is the highest at the weld seam,and the overall distribution is saddle shaped.关键词
激光自熔焊/TA5钛合金/显微组织/拉伸性能/显微硬度Key words
laser self-fusion welding/TA5 titanium alloy/microstructure/tensile property/microhardness引用本文复制引用
陈高澎,万自永,李鹏,穆壮壮,雷健康,陈春阳,王伟超,李要宗..TA5钛合金激光焊接头组织与力学性能分析[J].金属加工（热加工）,2026,(6):58-64,7.基金项目
国家重点研发计划项目(MK220801). （MK220801）
