Ti6Al4V的激光选区熔化单道成形数值模拟与实验验证

向羽,张树哲,李俊峰,魏正英,杨理想,姜立昊

Numerical simulation and experimental verification for selective laser single track melting forming of Ti6Al4V

Yu XIANG,Shu-zhe ZHANG,Jun-feng LI,Zheng-ying WEI,Li-xiang YANG,Li-hao JIANG

表 1 数值模拟采用的材料参数和工艺条件

Tab.1 Material parameters and processing conditions used in numerical simulation

参数 数值 Ti6Al4V 固相线Ts/K 1 877 Ti6Al4V液相线Tl/K 1 923 Tlv/K 3 313 Llv/(J·kg−1) 8.88×106 T0/K 293.15 P/W 220~380（间隔20 W） 扫描速度v/(mm·s−1) 1 200~3 800 (间隔200 mm/s) 激光光斑直径d/μm 70 α 0.68[19] ${\sigma _{\rm{s}}}$/(W·m−2·K−4) 5.67×10−8 hc/(W·m−2·K−1) 60 R/(J·mol−1·K−1) 8.314 472 εr 0.4 M/(kg·mol−1) 46.58 保护气氛 氩气 p0/Pa 1 500