The diffusion zone width of main alloying elements increases and hardness of the friction weld zone near TC4 titanium alloy side improves after post-weld heattreatment.
经焊后回火热处理后，主要合金元素沿焊合区的扩散区宽度增大；焊合区钛合金侧硬度值显著提高。
2
The effective method to improve the impact ductility of this zone is to change the welding process and conduct post-weld heattreatment, which is help to divide M-A component into ferrite and carbide.
改善焊接工艺或进行焊后热处理，使M - A组元分解成铁素体和碳化物是提高其韧性的有效方法。
3
The tensile strength of welded joint is significantly improved after heattreatment and the failure occurred far away from the weld metal zone.