Analysis of fatigue resistance improvements via surface severe plastic deformation

被引：107

作者：

Dai, K. ^{[1
]}

Shaw, L. ^{[2
]}

机构：

[1] Qual Engn & Software Technol, E Hartford, CT 06108 USA

[2] Univ Connecticut, Dept Chem Mat & Biomol Engn, Storrs, CT 06269 USA

来源：

INTERNATIONAL JOURNAL OF FATIGUE | 2008年 / 30卷 / 08期

基金：

美国国家科学基金会;

关键词：

fatigue limit; surface severe plastic deformation; nanomaterials; residual stresses; work hardening;

D O I：

10.1016/j.ijfatigue.2007.10.010

中图分类号：

TH [机械、仪表工业];

学科分类号：

0802 ;

摘要：

Numerical simulations have been performed to analyze the individual contributions of the nanocrystalline surface layer, residual compressive stresses, and a work-hardened surface region to the improved fatigue limit of a nickel alloy subjected to the surface nanocrystallization and hardening (SNH) treatment. The contributions of the nanocrystalline surface layer and work-hardened surface region have been separated from that of residual compressive stresses. The study suggests that the nanocrystalline surface layer and work-hardened surface region play a significant role in enhancing the fatigue limit of the SNH-processed nickel alloy. In contrast, less contribution is provided by residual compressive stresses. (C) 2007 Elsevier Ltd. All rights reserved.

引用

页码：1398 / 1408

页数：11

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