Enhancing torsion fatigue behaviour of a martensitic stainless steel by generating gradient nanograined layer via surface mechanical grinding treatment

被引：84
作者：
Huang, H. W. [1 ]
Wang, Z. B. [1 ]
Yong, X. P. [2 ]
Lu, K. [1 ]
机构：
[1] Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, Shenyang 110016, Peoples R China
[2] Shenyang Blower Works Grp Co Ltd, Shenyang 110869, Peoples R China
来源：
MATERIALS SCIENCE AND TECHNOLOGY | 2013年 / 29卷 / 10期
基金：
中国国家自然科学基金;
关键词：
Nanostructured materials; Gradient nanograined; Surface mechanical grinding treatment; Martensitic stainless steel; Torsion fatigue; SEVERE PLASTIC-DEFORMATION; ULTRAFINE-GRAINED METALS; ATTRITION TREATMENT; NANOCRYSTALLINE METALS; RESISTANCE; ALLOYS; TITANIUM; MICROSTRUCTURE; COPPER;
D O I：
10.1179/1743284712Y.0000000192
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
A gradient nanograined (GNG) surface layer was formed on a martensitic stainless steel bar sample by means of the surface mechanical grinding treatment (SMGT). The average grain size is similar to 25 nm on the topmost surface layer and increases gradually with increasing depth. The torsion fatigue strength is elevated by 38% with the GNG surface layer compared with the original material. An additional 8% increment in fatigue strength is achieved after a post-annealing treatment of the SMGT sample. By analysing the microstructure, hardness, surface roughness and residual stress distribution in the SMGT samples, we believe that the enhanced fatigue resistances originate from the GNG structure with a hard surface layer and a high structural homogeneity.
引用
收藏
页码：1200 / 1205
页数：6
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