Improvement of Fatigue Strength of Maraging Steel by Shot Peening

被引：32

作者：

Kawagoishi, N. ^{[1
]}

Nagano, T. ^{[2
]}

Moriyama, M. ^{[3
]}

Kondo, E. ^{[1
]}

机构：

[1] Kagoshima Univ, Dept Mech Engn, Kagoshima 8900065, Japan

[2] Miyakonojo Natl Coll Technol, Dept Mech Engn, Yoshio, Miyakonojo, Japan

[3] Dai Ichi Univ, Dept Mech Engn, Coll Technol, Kokubuchuo, Kirishima, Japan

来源：

MATERIALS AND MANUFACTURING PROCESSES | 2009年 / 24卷 / 12期

关键词：

Fatigue; Fracture mechanism; Maraging steel; Reversion austenite; Shot peening;

D O I：

10.1080/10426910903386055

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Rotating bending fatigue tests up to 108cycles were carried out to investigate the effects of shot peening on the fatigue strength and the fracture mechanism in wide range of fatigue life of an 18% Ni maraging steel by using shot particles of various sizes or hardness. Fatigue strength was increased markedly by shot peening in the wide region of fatigue life. The S-N curves showed duplex S-N properties because of the transition of fracture origin from the specimen surface in the short life region to the subsurface in the long life one. Double shot peening by using superhard fine particles was effective to improve the fatigue strength for surface fracture, though the fatigue strength for an internal fracture was only slightly influenced. Fatigue strength for the internal fracture was increased by formation of reversion austenite, suppressing intergranular cracking.

引用

页码：1431 / 1435

页数：5

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