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Chin J Mater Res  2008, Vol. 22 Issue (6): 629-633    DOI:
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High cycle fatigue behavior of medium–carbon trip steel at different tensile strength levels
BAN Lili1;2; HUI Weijun1;2†; YONG Qilong1;2; WENG Yuqing2;3; DONG Han2
1.Faculty of Materials and Metallurgical Engineering; Kunming University of Science and Technology; Kunming 650093
2.Institute for Structural Materials; Central Iron & Steel Research Institute; Beijing 100081
3.The Chinese Society for Metals; Beijing 100711
Cite this article: 

BAN Lili; HUI Weijun; YONG Qilong; WENG Yuqing; DONG Han. High cycle fatigue behavior of medium–carbon trip steel at different tensile strength levels. Chin J Mater Res, 2008, 22(6): 629-633.

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Abstract  

Bending rotating fatigue properties and fatigue crack growth (FCG) characteristic of a medium–carbon TRIP steel at different tensile strength (Rm) levels were investigated. The results show that the fatigue  limits σ−1 of austempering (AT) specimens are higher than those of quenching and tempering (QT)  specimens at the strength levels of 1100 MPa and 1300 MPa. The ratios of σ−1 to Rm−1/Rm) of AT  specimens can reach 0.56, which are higher than those of QT specimens (0.51 ~ 0.52), and the FCG  results show that the stage–Ⅱ fatigue crack growth rates da/dN of AT specimens are lower than those  of QT specimens at the same tensile strength level. Moreover, the differences in fatigue limit and da/dN  between AT and QT conditions decreased with the increase of tensile strength from 1100 MPa to 1300  MPa.

Key words:  metallic materials      TRIP steel      tensile strength      austempering      fatigue property     
Received:  27 March 2008     
ZTFLH: 

TG142

 
  TG111

 

URL: 

https://www.cjmr.org/EN/     OR     https://www.cjmr.org/EN/Y2008/V22/I6/629

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