Journal
FATIGUE & FRACTURE OF ENGINEERING MATERIALS & STRUCTURES
Volume 38, Issue 4, Pages 445-455Publisher
WILEY-BLACKWELL
DOI: 10.1111/ffe.12245
Keywords
FSW joint; fatigue analysis; hardness; microstructure; FEA
Funding
- National Natural Science Foundation of China [51375021]
- Beijing Municipal Education Commission Project [KM201110005015]
- Talents project of the Beijing Municipal Party Committee Organization Department
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Fatigue properties of friction stir welding (FSW) butt joints for Al-Cu alloy 2219-T6 were investigated by experimental analysis and numerical simulation. Microstructure characteristics of FSW butt joints for 2219 aluminium alloy were studied during different fatigue stages. Micro hardness values and grain sizes across the FSW joint at different cycles were measured to study the fatigue properties of the joint. Local mechanical performances of the FSW butt joints were investigated based on the micro tensile tests. Fatigue parameters of different regions in the FSW joints were obtained from the four-point-correlation method. The local stress and strain response of the FSW joints were obtained based on mechanical performances of the micro tension specimens. The comparison results between simulation and tests analysis show that the built finite element model is effective for estimating the weak areas for FSW joints.
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