Effect of microstructure and stress ratio on fatigue crack propagation behavior of A7N01 aluminum alloy fiber laser-VPTIG hybrid butt welded

Optics & Laser Technology（2023）

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摘要

•The fatigue crack propagation rate in weld zone is the fastest compared with other areas of welded joint.•With the increase of stress ratio, the fatigue crack propagation rate increases.•Compared with grain boundary strengthening, precipitation strengthening is more important for fatigue crack propagation.

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关键词

A7N01 aluminum,Laser-VPTIG hybrid welding,Fatigue crack,Stress ratio,Microstructure

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