电焊机2025，Vol.55Issue(10)：42-53,12.DOI:10.7512/j.issn.1001-2303.2025.10.06
界面压力调控飞秒激光焊接蓝宝石/钛合金接头剪切强度的机制研究
Enhancement Mechanism of Shear Strength in Sapphire/TC4 Alloy Joints via Femtosecond Laser Welding with Interfacial Pressure
摘要
Abstract
The laser direct welding connection between sapphire and TC4 alloy was an important challenge in the fields of aerospace,electronic packaging.Through systematic research on the influence of interfacial pressure from 0 MPa to1.75 MPa on welding quality,it was found that pressure parameters significantly affect joint performance by regulating the triple mechanism of interface contact,element diffusion,and fracture mechanism.Under the action of the optimized interface pres-sure of 0.75 MPa,even in the practical working conditions where the welded parts are in non-optical contact and the metal surface roughness is as high as Ra 0.8 μm,the elimination of interface gaps,the promotion of Ti Al interdiffusion to for-mAlTi3 intermetallic compounds,and the effective balance between interface bonding and base metal integrity were achieved.The shear strength of the joint reached 32.0 MPa,and fracture analysis showed brittle mixed fracture characteris-tics under this condition.The research provided a novel solution for direct fusion welding of sapphire-metal heterostructures.关键词
蓝宝石/TC4钛合金/飞秒激光焊接/界面压力/剪切强度Key words
sSapphire/TC4 alloy/femtosecond laser welding/interfacial pressure/shear strength分类
矿业与冶金引用本文复制引用
左全奇,龙伟民,秦建,沈元勋..界面压力调控飞秒激光焊接蓝宝石/钛合金接头剪切强度的机制研究[J].电焊机,2025,55(10):42-53,12.基金项目
中原科技创新领军人才(244200510023) （244200510023）
