Paper Title:
Research on Ultra-High Cycle Fatigue Property of 45 Steel
  Abstract

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)
Chapter
Chapter 5: Joining Processes and Equipment
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, C. Y. Deng, D. P. Wang, R. Y. Tian, "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
$32.00
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