期刊
MATERIALS & DESIGN
卷 30, 期 6, 页码 1886-1893出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.matdes.2008.09.021
关键词
Friction stir welding; Aluminum alloy; Temperature evolution; Microstructure; Mechanical properties
The aim of this work is to investigate the temperature evolution, microstructure and mechanical properties of the joint during friction stir welding of thick 2219-O aluminum alloy with the butt joint. Different types of thermocouple layouts were designed to measure the temperature evolutions during tool inserting and stable welding processes. Dynamic recrystallised structures in the weld nugget zone (WNZ) were observed and different grain sizes were presented through the thickness. Tensile testing results indicated that the tensile strength (sigma(b)) and yield strength (sigma(0.2)) of joints increased and the elongation (delta) of joints decreased with increasing the tool rotary speed. The joint top had the highest mechanical properties. Most of the failures presented a ductile fracture in the joints. Vickers microhardness was measured across the joint top, middle and bottom. and through the thickness in the WNZ. The result showed that the microhardness of different zones varied significantly. (C) 2008 Elsevier Ltd. All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据