Fatigue Limit Prediction of the Matrix of 17-4PH Stainless Steel Based on Small Crack Mechanics

被引：16

作者：

Nie, Defu ^{[1
]}

Mutoh, Yoshiharu ^{[2
]}

机构：

[1] Natl Technol Res Ctr PVP Safety Engn, Hefei Gen Machinery Res Inst, Hefei 230031, Anhui, Peoples R China

[2] Nagaoka Univ Technol, Nagaoka, Niigata 9402188, Japan

来源：

JOURNAL OF PRESSURE VESSEL TECHNOLOGY-TRANSACTIONS OF THE ASME | 2013年 / 135卷 / 02期

关键词：

fatigue limit; 17-4PH stainless steel; small crack; HIGH-STRENGTH STEELS; INCLUSION SIZE; HIGH-PRESSURE; BEHAVIOR;

D O I：

10.1115/1.4023428

中图分类号：

TH [机械、仪表工业];

学科分类号：

0802 ;

摘要：

The experimentally obtained fatigue limit of high strength steel is generally a value reduced by inherent flaws, and such a value does not characterize the resistance of the matrix of high strength steel to cyclic loading. To investigate the fatigue limit of the matrix, fatigue tests of 17-4PH stainless steel were performed. 17-4PH stainless steel showed a distinct dual-stage S-N curve: one stage corresponding to high stress where crack initiated at the surface and another stage corresponding to low stress where crack initiated from the subsurface inclusion (Al2O3). Based on small crack mechanics, a model was proposed to predict the fatigue limit of the matrix of 17-4PH stainless steel and its validity has been discussed.

引用

页数：5

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