Thermal Cycling under Constant Load to Low Temperatures of Aluminum and Magnesium Alloys

2009 ◽  
pp. 37-37-14 ◽  
Author(s):  
V. Weiss ◽  
G. T. Schaeffer ◽  
A. Saule ◽  
G. Sachs
Keyword(s):  
Thermal Cycling ◽  
Magnesium Alloys ◽  
Low Temperatures ◽  
Constant Load ◽  
Aluminum And Magnesium Alloys

Damage Mechanisms of 5A06 Al Alloy Weld Joints under Constant Load and Thermal Cycling Condition

2007 ◽  
Vol 539-543 ◽  
pp. 368-373 ◽  
Author(s):  
Cheng Jin ◽  
Ji Tai Niu ◽  
Shi Yu He ◽  
Hong Bin Geng ◽  
G. Long
Keyword(s):  
Thermal Cycling ◽  
Mechanical Performance ◽  
Base Material ◽  
Constant Load ◽  
Al Alloy ◽  
Damage Mechanisms ◽  
Weld Joints ◽  
Thermal Cycling Condition ◽  
Cycling Condition ◽  
Alloy Weld

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.

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