Effects of high-intensity ultrasonic-wave emission on the weldability of aluminum alloy 7075-T6

被引：85
作者：
Dai, WL [1 ]
机构：
[1] Feng Chia Univ, Dept Mech & Comp Aided Engn, Taichung 40724, Taiwan
来源：
MATERIALS LETTERS | 2003年 / 57卷 / 16-17期
关键词：
ultrasonic-wave emission; ultrasound-assisted technique; aluminum alloy 7075-t6; peak temperature; dwell time; cooling rate; crystal growth; hardness;
D O I：
10.1016/S0167-577X(02)01262-4
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
In this work high-intensity ultrasonic wave is conducted into aluminum alloy 7075-T6 to observe the effect of emission waves on the weldability during inert gas tungsten arc (GTA) welding. Through the heat-affected zone (HAZ) and the weld, the ultrasonic-wave emissions with different paths are examined and directly correlated to I the heating time, dwell time, cooling rate, as well as peak temperature of the thermal cycle, and to the grain growth, weld penetration, and hardness of the weldment. In addition, a methodology based on the characteristic curves of the relative amplitude ratios of the reflected longitudinal wave and vertical shear wave for improving the weldability of aluminum alloy 7075-T6 is presented. (C) 2002 Elsevier Science B.V. All rights reserved.
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页码：2447 / 2454
页数：8
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