Research on Ultra-High Cycle Fatigue Property of 45 Steel

Abstract:

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Fatigue property of 45 steel was studied in this paper with the method of ultrasonic fatigue testing, and SEM was used to analyze microscopic characteristics of the fatigue fracture. Fatigue test results show that: S-N curves descend continuously after 108 cycles, there is no fatigue limit as the traditional fatigue conception describes. Therefore, it is very dangerous to design welded structure working in the ultra-high cycle interval with the fatigue strength corresponding to 5×106 cycles. In the super-long life range, the fatigue property of welded joints is worse than the base metal. SEM analysis shows that: fatigue crack mainly initiates from the defects in the surface or sub-surface.

Info:

Periodical:

Advanced Materials Research (Volumes 295-297)

Edited by:

Pengcheng Wang, Liqun Ai, Yungang Li, Xiaoming Sang and Jinglong Bu

Pages:

1911-1914

DOI:

10.4028/www.scientific.net/AMR.295-297.1911

Citation:

L. L. Jin et al., "Research on Ultra-High Cycle Fatigue Property of 45 Steel", Advanced Materials Research, Vols. 295-297, pp. 1911-1914, 2011

Online since:

July 2011

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Price:

$35.00

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