With the 2024 aluminum alloy plate as the main object,microstructures,microhardness,residual stresses and tension-tension fatigue properties of as-machined aluminum samples,laser aided forming samples and shot peening samples were studied.The results show that microstructures of laser aided forming sample were not varied obvious,but microhardness and extensive residual stress decreased;and surface microstructures were varied and microhardness was raised in shot peening samples.Shot peening can greatly improve fatigue properties.Tension-tension fatigue lives of shot peening samples were not only higher than laser aided forming samples,but higher than as-machined aluminum samples. Key words
修改评论