首页|Effect of high frequency impacting and rolling on fatigue crack growth of 2A12 aluminum alloy welded joint
Effect of high frequency impacting and rolling on fatigue crack growth of 2A12 aluminum alloy welded joint
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NETL
NSTL
Elsevier
The influence of high frequency impacting and rolling (HFIR) on fatigue crack growth (FCG) of welded joint were researched. Results showed that grain sizes of the top surface of BM and WS were refined; Both the nano-microhardness, elastic modulus and maximum compressive residual stress (CRS) were increased. The introduction of near-surface CRS leads to obvious changes of the surface actual stress situation, increases the crack closure and decreases the stress intensity factor of crack tip. FCG life of BM and WS increased by 1.594～1.744 times and 2.902～3.231 times. BM and WS exhibited a different fracture characterized before and after HFIR.
2A12 Aluminum alloyWelded jointHigh frequency impacting and rollingFatigue crack growthStatistical analysisFatigue fracture mechanism
Huijing Zhang、Xiaohui Zhao、Yu Liu
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Key Laboratory of Automobile Materials, School of Materials Science and Engineering, Jilin University, Changchun 130025, China
School of Mechanical and Aerospace Engineering, Jilin University, Changchun 130025, China
NETL
NSTL
Elsevier
