Surface nanocrystallization of 316L stainless steel induced by ultrasonic shot peening
Surface nanocrystallization of 316L stainless steel induced by ultrasonic shot peening
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DOI：
10.1016/s0921-5093(00)00686-9
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发表时间：
2000-06-30
期刊：
影响因子：
6.4
通讯作者：
Lu, K
中科院分区：
文献类型：
--
作者：
Liu, G;Lu, J;Lu, K
引入了一种新技术，以通过超声射击式处理处理在316L不锈钢上实现表面纳米结晶（即产生纳米结构的表面层）。通过使用X射线衍射，扫描电子显微镜和透射电子显微镜来表征316L不锈钢的显微结构演化。超声射击式处理后，观察到明显的谷物细化，并发现纳米晶表面层。纳米晶表面层的厚度从几个到约30 mu不等，具体取决于治疗持续时间，晶粒尺寸从顶部表面层的约10 nm增加，逐渐在大约30 mu的深度到100 nm以上M根据处理样品的微观结构演化的变形行为和TEM观察，分析了纳米结晶机制。 （c）2000 Elsevier Science S.A.保留所有权利。
A new technique was introduced to realize surface nanocrystallization (i.e. generation of a surface layer of nanostructures) on a 316L stainless steel by means of ultrasonic shot peening treatment. The microstructural evolution of the 316L stainless steel was characterized by using X-ray diffraction, scanning electron microscopy and transmission electron microscopy. After the ultrasonic shot peening treatment, obvious grain refinement was observed and a nanocrystalline surface layer was found. The thickness of the nanocrystalline surface layer varies from a few to about 30 mu m depending upon the treatment duration and the grain size increases from about 10 nm at the top surface layer, gradually to more than 100 nm at a depth of approximate to 30 mu m The nanocrystallization mechanism was analyzed in terms of the deformation behavior and TEM observations of the microstructural evolution of the treated samples. (C) 2000 Elsevier Science S.A. All rights reserved.