Weld microstructure refinement in a 1441 grade aluminium-lithium alloy

被引：118
|
作者：
Reddy, GM [1 ]
Gokhale, AA [1 ]
Rao, KP [1 ]
机构：
[1] INDIAN INST TECHNOL, DEPT ENGN MET, MADRAS, TAMIL NADU, INDIA
来源：
JOURNAL OF MATERIALS SCIENCE | 1997年 / 32卷 / 15期
关键词：
D O I：
10.1023/A:1018662126268
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Clad 2 mm thick sheets of Russian 1441 grade Al-Li alloys were welded using a gas tungsten are welding process (GTAW). Comparisons were made between the weld beads obtained under (i) continuous current (CC), (ii) pulsed current (PC), and (iii) are oscillation (AO) conditions for their macro- and microstructural details. In the case of CC GTAW, sound welds could be produced only under a narrow range of welding parameters. Centre line cracks, which occurred in CC GTAW welds under certain conditions, were halted by switching to PC or AO conditions while the welding was in progress. Microstructural refinement was significant in the case of PC and AO GTA welding.
引用
收藏
页码：4117 / 4126
页数：10
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