X-ray diffraction study on microstructures of shot/laser-peened AISI316 stainless steel
X-ray diffraction study on microstructures of shot/laser-peened AISI316 stainless steel
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DOI：
10.1016/j.jnucmat.2013.07.010
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发表时间：
2013-11
影响因子：
3.1
通讯作者：
M. Kumagai;K. Akita;Y. Itano;M. Imafuku;S. Ohya
中科院分区：
文献类型：
--
作者：
M. Kumagai;K. Akita;Y. Itano;M. Imafuku;S. Ohya
采用X射线衍射线轮廓分析方法研究了AISI 316不锈钢经喷丸和激光喷丸处理后的显微组织特征。两个样本表现出相似的压缩残余应力分布。虽然位错的数量增加，晶粒细化与这两个过程中，在SP标本的位错密度显着大于在LP标本。SP试样中的微晶尺寸是LP试样中的微晶尺寸的三分之一。SP过程诱发马氏体相变。在微观结构特征的变化不同的样品进行两个过程。SP过程导致样品中的微观结构特征的更大变化，其中引起的残余应力类似于由LP过程引起的残余应力。因此，显微组织特征的变化取决于变形过程而不同。
Microstructural features of AISI316 stainless steels processed by shot peening (SP) and laser peening (LP) were studied using X-ray diffraction line profile analyses. Both specimens exhibited similar compressive residual stress profiles. Although the number of dislocations was increased and the crystallites were refined with both processes, the dislocation density in the SP specimen was significantly greater than that in the LP specimen. The crystallite size in the SP specimen was one-third that in the LP specimen. The SP process induced martensite transformation. The variations in the microstructural features differed between samples subjected to the two processes. The SP process resulted in a greater variation in the microstructural features in a sample in which residual stresses similar to that induced by the LP process were induced. Thus, the variations in the microstructural features differed depending on the deformation process.