吉林大学学报(工学版) ›› 2014, Vol. 44 ›› Issue (5): 1371-1374.doi: 10.7964/jdxbgxb201405024

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High cycle fatigue performance of TRIP automobile steel

YU Yan,ZHANG Xiao-meng,LIU Yun-xu   

  1. Department of Materials, Changchun University of Technology,Changchun 130012, China
  • Received:2013-03-12 Online:2014-09-01 Published:2014-09-01

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Abstract: The high cycle fatigue performance of TRIP automobile steel is investigated. First, a series of high cycle fatigue experiments of TRIP steel were conducted. Then, the fatigue limit and fatigue life factor at 800 MPa tensile strength level were studied, and compared with that of DP steel plate at the same strength level. Finally, the microstructure of the fatigue fracture and influence of TRIP effect on the fatigue property of TRIP steel were analyzed. Results show that the TRIP effect improves the fatigue resistance of the steel to some extent. Under the 107 times cycle base condition, the fatigue limit of TRIP steel is obviously higher than that of DP steel, and its fatigue resistance performance is better. The crack source and fatigue area of TRIP steel show obvious ductile fracture characteristics.

Key words: metallic material, TRIP steel, DP steel, fracture scanning, fatigue performance

CLC Number: 

  • TG113
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