Affiliation:
1. Dalian Jiaotong University
2. Harbin Institute of Technology
Abstract
In this paper, the micro-damage mechanisms of 5A06 Al alloy weld joints have been
studied under the condition of constant load and cyclic thermal load. The mechanical
performance variation of the base material and its weld joint are analyzed and
compared. Microstructure analysis reveals that the main damage mechanism in weld
joints is the interior voids nucleation and growth. The voids distribution and evolution
govern the damage process. Test results also show most fractures occur at HAZ near
the welding fusion line. The development of these voids results in the performance
deterioration of the weld joints under thermal cycling condition.
Publisher
Trans Tech Publications, Ltd.
Subject
Mechanical Engineering,Mechanics of Materials,Condensed Matter Physics,General Materials Science
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