scholarly journals The formation mechanism of characteristic region at crack initiation for very-high-cycle fatigue of high-strength steels

2016 ◽  
Vol 89 ◽  
pp. 108-118 ◽  
Author(s):  
Youshi Hong ◽  
Xiaolong Liu ◽  
Zhengqiang Lei ◽  
Chengqi Sun
Keyword(s):  
Crack Initiation ◽  
Formation Mechanism ◽  
High Cycle Fatigue ◽  
High Strength Steels ◽  
High Strength ◽  
Cycle Fatigue ◽  
Characteristic Region ◽  
Very High Cycle Fatigue ◽  
Very High

Study on Very High Cycle Fatigue Fracture of High Strength Steel with CFB/M Complex Microstructure

2010 ◽  
Vol 638-642 ◽  
pp. 3839-3845 ◽  
Author(s):  
Y. Yu ◽  
B.Z. Bai ◽  
Jia Lin Gu
Keyword(s):  
Crack Initiation ◽  
High Purity ◽  
High Cycle Fatigue ◽  
High Strength Steels ◽  
High Strength ◽  
Inclusion Size ◽  
Cycle Fatigue ◽  
Very High Cycle Fatigue ◽  
Very High ◽  
Production Conditions

The influence of production conditions and Nb microalloy on the very high cycle fatigue (VHCF) behaviors of different Carbide-free bainite/martensite (CFB/M) steels was studied, which include steels produced in laboratory and steelworks. Results show the Nb-microalloy can strengthen the microstructure including the soft bainite plate and improve the VHCF property evidently. In addition, the high purity of steels can avoid inclusion induced crack initiation, but can not improve the VHCF property unless the microstructure possesses favorable uniformity. The critical inclusion size is suggested to be 10-15μm and the CFB/M complex microstructure may be less sensitive to inclusions than other high strength steels.

On effect of hydrogen on very high cycle fatigue behaviours of high strength steels

2013 ◽  
Vol 29 (11) ◽  
pp. 1290-1296 ◽  
Author(s):  
J-B Shi ◽  
Y D Li ◽  
W M Guo ◽  
N Xu ◽  
X F Wu ◽  
...  
Keyword(s):  
High Cycle Fatigue ◽  
High Strength Steels ◽  
High Strength ◽  
Cycle Fatigue ◽  
Very High Cycle Fatigue ◽  
Very High
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