搅拌摩擦焊接焊缝金属的超塑性行为  

Superplastic Behavior of Weld Metal by Friction Stir Welding

作　　者：刘小文[1] 谷建军[1] 马彩霞[1] 

机构地区：[1]西北工业大学,陕西西安710072

出　　处：《稀有金属材料与工程》2009年第A01期415-418,共4页Rare Metal Materials and Engineering

基　　金：国家自然科学基金(50275123)

摘　　要：通过对防锈铝搅拌摩擦焊接头焊缝金属的高温拉伸试验,探讨搅拌摩擦焊接头焊缝金属的超塑性行为,以期优化焊接参数来使材料达到超塑性状态,形成良好的接头。结果表明:在450℃,夹头速度为0.6mm/min的情况下得到的焊缝金属的最高延伸率为91%。从应力应变曲线初步计算得到m值为0.534。可以初步判定,在450℃附近,有超塑性现象。The aim of the present work is to discuss superplastic behavior of weld metal by executing high temperature tension test to weld metal of corrosion-resisting aluminium alloy and to find out the right parameters on which materials produce superplastic behavior and form fine joint. Experimental results show the maximal elongation percentage （91%） can be gotten on the condition of 450 ℃ and 0.6 mm/min collet travel speed. The m value, 0.534 can be calculated roughly from the stress-strain curve. It can be concluded superplastie behavior would appear around 450 ℃.

关 键 词：搅拌摩擦焊 超塑性 防锈铝 

分 类 号：TG453.9[金属学及工艺—焊接] TG113.253