表面机械研磨诱导AISI 304不锈钢表层纳米化 : Ⅰ. 组织与性能

SURFACE NANOCRYSTALLIZATION OF AISI 304 STAINLESS STEEL INDUCED BY SURFACE MECHANICAL ATTRITION TREATMENT : I. Structure and Property

Research output: Journal Publications and ReviewsRGC 21 - Publication in refereed journalpeer-review

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Author(s)

  • 张洪旺
  • 刘刚
  • 黑祖昆
  • 吕坚
  • 卢柯

Detail(s)

Original languageChinese (Simplified)
Pages (from-to)342-346
Journal / PublicationJinshu Xuebao/Acta Metallurgica Sinica
Volume39
Issue number4
Publication statusPublished - Apr 2003
Externally publishedYes

Abstract

采用表面机械研磨处理(SMAT)在AISI 304不锈钢上制备出纳米结构表层,研究纳米化行为及其对硬度的影响。结果表明:经过SMAT后,样品表面形成了厚度约为30μm的纳米晶层,显微组织由平均晶粒尺寸约为10nm的单一马氏体相演变为尺寸稍大的双相组织;在距表面30—300μm的范围内,显微组织由以亚微米级的奥氏体多系孪晶为主逐渐演变为单系孪晶,表面纳米化是晶粒碎化与纳米尺度新相形成共同作用的结果,与心部相比,表面硬度显著提高。
Nanostructured surface layer was synthesized on an AISI 304 stainless steel by using surface mechanical attrition treatment (SMAT), the grain refinement behavior and the hardness variation were examined. Experimental results show that a nanostructured surface layer of about 30 μm thick forms after the SMAT, in which the microstructure changes from the martensite phase of about 10 nm in size to a mixture of the martensite and the austenite phases with a little large size. In the region from 30 to 300 μm depth, the microstructure changes from multidirectional austenite twins (the dominating phase) to one-directional ones, and the size of twin increases from submicro-scale to micron-scale. The surface nanocrystallization can be attributed to the refinement of initial coarse grains and the formation of nanoscale new phase. The hardness of the nanostructured layer is enhanced significantly after the SMAT compared with that of the initial sample.

Research Area(s)

  • 表面机械研磨, AISI 304不锈钢, 表面纳米化, 硬度, surface mechanical attrition treatment, AISI 304 stainless steel, surface nanocrystallization, hardness

Citation Format(s)

表面机械研磨诱导AISI 304不锈钢表层纳米化: Ⅰ. 组织与性能. / 张洪旺; 刘刚; 黑祖昆 et al.
In: Jinshu Xuebao/Acta Metallurgica Sinica, Vol. 39, No. 4, 04.2003, p. 342-346.

Research output: Journal Publications and ReviewsRGC 21 - Publication in refereed journalpeer-review