TC4钛合金线性摩擦焊接头的冲击韧性及断口特征  

Impact Toughness and Fracture Characteristics of Linear Friction Welded TC4 Joint

作　　者：马铁军[1] 张学军[2] 杨思乾[1] 张勇[1] 张云霞[1] 

机构地区：[1]西北工业大学材料学院,西安710072 [2]北京航空材料研究院,北京100095

出　　处：《航空材料学报》2007年第6期40-44,共5页Journal of Aeronautical Materials

基　　金：航空科学基金资助项目(20061153015)

摘　　要：在自制的XMH-160型线性摩擦焊机上利用先期试验优化的规范参数进行TC4线性摩擦焊接试验。对焊后试件进行冲击试验研究,冲击试件基本沿母材断裂。观察冲击试件的宏观和微观断口,并分析接头的金相组织。结果表明,焊缝超细晶组织所具有的高断裂应力是焊接接头冲击韧性值高于母材的主要原因。Based on the optimum parameters obtained from prevenient experiments, the linear friction welding （LFW） experiment of TCA titanium alloy was carried out with homemade XMH-160 LFW machine. It was found that all the impact test specimens cracked along the parent metal of TC4 alloy after impact test. The macroscopic and microscopic characteristics of impact fractures were observed, and the structure features of the joints were analyzed. The results show that the superfine structure of weld contributes to the higher notched bar impact strength of joint than that of the parent metal.

关 键 词：TC4钛合金 线性摩擦焊 冲击韧性 断口 

分 类 号：TG453.9[金属学及工艺—焊接]