Analysis of fatigue resistance improvements via surface severe plastic deformation

被引：104
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
收藏
页码：1398 / 1408
页数：11
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