Paper Titles
Interaction of Circular Lining and Interior Linear Crack by Incident SH-Wave
p.521
A Unified Fatigue Life Calculation Model for Notched Components Based on Elastic-Plastic Fracture Mechanics
p.525
Local and Non-Local Approaches to Fatigue of Weldments: State of the Art and Possible Developments
p.529
Numerical Testing for Dynamic Fracture of Three Point Bending Cement Mortar Specimen with Off-Center Edge-Crack
p.533
Improvement of Fatigue Strength of Maraging Steel by Shot Peening
p.537
Fatigue Crack Growth Resistance in Ni-Base Super Alloy
p.541
Temper Embrittlement and Fracture Control Method Based on NGS Theory and Grain Refinement Technique
p.545
Effect of Isothermal Holding Temperature on NGS Kinetics of Phosphorus and Temper Embrittlement
p.549
Finite Element Analysis of a Composite Bulkhead Structure
p.553

Improvement of Fatigue Strength of Maraging Steel by Shot Peening

Article Preview

Abstract:

Rotating bending fatigue tests up to 108 cycles were carried out to investigate the effects of shot peening on the fatigue strength and the fracture mechanism in 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 super-hard fine particles was effective to improve the fatigue strength for surface fracture, though the fatigue strength for an internal fracture was hardly influenced. These results were discussed from the points of view of effects of surface roughness, residual stress and work hardening on the fatigue strength.

You might also be interested in these eBooks
Advances in Fracture and Damage Mechanics VI View Preview

Info:

Periodical:

Key Engineering Materials (Volumes 348-349)

Pages:

537-540

DOI:

https://doi.org/10.4028/www.scientific.net/KEM.348-349.537

Citation:

Cite this paper

Online since:

September 2007

Authors:

Norio Kawagoishi, Takanori Nagano, M. Moriyama, Eiji Kondo

Keywords:

Fatigue, Fracture Mechanic, Maraging Steel, Rotating Bending, Shot Peening

Export:

RIS, BibTeX

Price:

Permissions CCC:

Request Permissions

Permissions PLS:

Request Permissions

Сopyright:

© 2007 Trans Tech Publications Ltd. All Rights Reserved

Share:

Citation:

References

[1] Y. Murakami and M. Shimizu: Trans. Jpn. Soc. Mech. Eng. A. Vol. 54(1983, ) p.413.

Google Scholar

[2] K. Endo, K. Komai, T. Fujimoto and Y. Matsuda: Trans. Jpn. Soc. Mech. Eng. A., Vol. 45(1979), p.1152.

Google Scholar

[3] V. F. Zackey, E. R. Parker and W. E. Wood: Proc. of the 3rd Inter. Conference on the strength of metals and alloys, 25(1973), p.175.

Google Scholar

[4] A. Tange, T. Akutsu and N. Takamura: Bane Ronbunshu, Vol. 36(1991), p.47.

Google Scholar

[5] Y. Murakami, S. Kodama and S. Konuma, Quantitative evaluation of effects of nonmetallic inclusions on fatigue strength of high strength steel, Trans. Jpn. Soc. Mech. Eng. A. 1988, 54, 688-695.

Google Scholar

[6] Y. Murakami, M. Abe and T. Kiyota: Trans. Jpn. Soc. Mech. Eng. A. Vol. 53(1987), p.688.

Google Scholar

[7] N. Kawagoishi, K. Morino, Y. Tajiri, Q. Chen, Q.Y. Wang and K. Fukada: Trans. Jpn. Soc. Mech. Eng. A., Vol. 71(2005), p.1362.

Google Scholar