Translated Title
Fatigue life prediction of FSW joints for 2219-T6 aluminum alloy
Translated Abstract
The inhomogeneity and fatigue properties of the friction stir welded butt joints for 2219-T6 aluminum alloy were analyzed by metallographic observation of different zones, fatigue tests and micro-hardness measurement. The results show that the lowest hardness and fatigue crack initiation sites are mainly located in heat affected zone. The elastic-plastic FE model was established based on the micro-hardness, microstructure and the mechanical properties obtained from micro-tensile tests of every zone. The stress and strain distributions of joints were simulated under cyclic loading. According to the FE simulations results, the fatigue lives were estimated by using the damage equation of Smith?Watson?Topper and the stress?strain data of the weak area in the joints. The results of estimations are compared with the test results and the errors are less than two times of factors.
Translated Keyword
FSW joint
friction stir welding
2219-T6 Al alloy
finite element simulation
fatigue life prediction
Access Number
WF:perioarticalzgysjsxb201410004
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