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首页> 外文期刊>Journal of Materials Engineering and Performance >Effect of Heat Treatments on Residual Stress and Properties of AISI 316L Steel Processed by Directed Energy Deposition
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Effect of Heat Treatments on Residual Stress and Properties of AISI 316L Steel Processed by Directed Energy Deposition

机译：热处理对通过定向能量沉积加工的AISI 316L钢残余应力和性能的影响

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摘要

AISI 316L stainless steel samples were produced by means of laser powder-directed energy deposition using optimized building conditions with two different deposition strategies. The samples, in the as-built state, were at first characterized in terms of microstructure, hardness and residual stresses by the incremental hole-drilling strain-gauge method. The results highlighted that the deposition strategy mainly affects the residual stress values, while the material hardness value is not strongly varied. The distribution of the residual stresses along the sample height was also evaluated by measuring the stress at different distances from the building platform. Furthermore, some samples underwent a homogenizing heat treatment for 2 h at 600 and 800 degrees C and were characterized and compared with the as-built ones. The results showed that the suggested heat treatments allow not only a reduction in residual stresses but also the homogenization of the microstructure confirmed by comparing the variations of the Vickers hardness values along the building direction. Tensile tests were also performed on the as-built and heat-treated samples in order to investigate the effect of the heat treatment on the tensile properties of the material.
机译：AISI 316L不锈钢样品采用激光粉末导向的能量沉积，使用具有两种不同的沉积策略的优化建筑条件。在由置于显微结构，硬度和残余应力的基础上首先通过增量空穴钻孔应变测量法来表征样品。结果强调，沉积策略主要影响残余应力值，而材料硬度值不会变化。还通过测量来自建筑平台的不同距离的应力来评估沿着样品高度沿着样品高度的分布。此外，一些样品在600和800℃下进行2小时的均质化热处理，并与原制的表征和比较。结果表明，建议的热处理不仅允许降低残余应力，而且还允许通过比较维氏硬度值沿建筑方向的变化来证实微观结构的均质化。还在嵌造和热处理样品上进行拉伸试验，以研究热处理对材料的拉伸性能的影响。

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