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首页> 外文期刊>Key Engineering Materials >Effects of severe air blast shot peening on microstructure and residual stress state of Al alloys
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Effects of severe air blast shot peening on microstructure and residual stress state of Al alloys

机译：强力喷丸喷丸处理对铝合金组织和残余应力状态的影响

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Surface grain refinement is a relatively new process aimed to enhance mechanical material properties. In this study A17075-T6 bars have been shot peened with parameters much different from those of conventional shot peening. Microstructure gradient has been observed by means of transmission electron microscopy (TEM), X-ray diffraction (XRD) and nano indentation tester. A fine grained layer was found on top surface of the specimens. Measurements indicate of notable improvements in cases of hardness and elastic modulus in comparison with untreated material. XRD results also show significant depth affected both in terms of residual stress and FWHM.rnThe results imply that using optimized shot peening parameters, it would be possible to create a fine grained layer on surface of component and consequently increase fatigue life and any other property affected by grain size.
机译：表面晶粒细化是旨在提高机械材料性能的相对较新的工艺。在这项研究中，对A17075-T6棒进行了喷丸处理，其参数与传统的喷丸处理有很大不同。已经通过透射电子显微镜（TEM），X射线衍射（XRD）和纳米压痕测试仪观察到了微观结构梯度。在样品的顶面上发现了细颗粒层。测量表明，与未处理的材料相比，硬度和弹性模量显着改善。 XRD结果还显示出在残余应力和FWHM方面都对深度有显着影响.rn结果表明，使用优化的喷丸处理参数可以在零件表面上形成细晶粒层，从而延长疲劳寿命并影响其他性能根据晶粒大小。

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