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首页> 外文期刊>Materialpruefung: Werkstoffe und Bauteile, Forschung Prufung Anwendung >Time dependent hardness and residual stress reduction in a shot-peened aluminum alloy 2024-T351
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Time dependent hardness and residual stress reduction in a shot-peened aluminum alloy 2024-T351

机译：喷丸铝合金2024-T351中随时间变化的硬度和残余应力的降低

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In common engineering practice, the shot-peened aluminum alloy 2024-T351 is often subjected to loading. After time passes, the residual stress induced by shot peening might relax leading to respective metal cracking and failure. For this study, samples were stored for two years and a comparison of the hardness and microstructure before and after two years storage was carreid out. The primary aim of this study was to determine the effect of time on hardness and microstructure of shot-peened sample, thus to calculate the residual stress relaxation depending on time parameter. The results showed that the hardness and the residual stress of the material reduced after two years. The average reduction of the hardness is 20 % and the residual stress reduction ranged at 47 %
机译：在通常的工程实践中，喷丸铝合金2024-T351通常要承受载荷。经过一段时间后，喷丸硬化引起的残余应力可能会松弛，从而导致相应的金属破裂和破坏。在本研究中，样品被保存了两年，并且比较了保存两年之前和之后的硬度和微观结构。这项研究的主要目的是确定时间对喷丸处理后的样品硬度和微观结构的影响，从而根据时间参数计算残余应力松弛。结果表明，两年后材料的硬度和残余应力降低。硬度平均降低20％，残余应力降低47％

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