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STUDY ON CRACK PROPAGATION OF 42CrMo.

Authors :
PEI, W. C.
DONG, J. W.
JI, H. C.
LONG, H. Y.
YANG, S. F.
Source :
Metalurgija. 2019, Vol. 58 Issue 3/4, p219-222. 4p.
Publication Year :
2019

Abstract

For the fatigue failure of 42CrMo, the tensile test was performed on the CT specimen at different load ratios using a fatigue tensile tester. Data on the fatigue crack growth rate of the material and the crack tip factor were obtained. Scanning electron microscopy (SEM) was used to observe the microstructure and crack initiation and propagation of fractures. The crack initiation and propagation path law during fatigue crack propagation were obtained. The fatigue crack life was calculated by Paris formula, and the fatigue crack growth test and microscopic observation were compared. The propagation law and fatigue crack life of different stages of crack propagation were analyzed. The results show that the stable propagation stage of fatigue crack propagation is the key stage to determine fatigue fracture, the rate of growth is related to the stress ratio. [ABSTRACT FROM AUTHOR]

Details

Language :
English
ISSN :
05435846
Volume :
58
Issue :
3/4
Database :
Academic Search Index
Journal :
Metalurgija
Publication Type :
Academic Journal
Accession number :
136670697