Experimental research on surface crack propagation laws for low alloy steel

1982 ◽  
Vol 16 (1) ◽  
pp. 105-113 ◽  
Author(s):  
Kang-Sian Lee ◽  
Len-Ji Yu ◽  
Zi-Hong Jin ◽  
Kai-Zuo Liang
Keyword(s):  
Crack Propagation ◽  
Alloy Steel ◽  
Experimental Research ◽  
Surface Crack ◽  
Low Alloy Steel

Hydrogen enhanced crack propagation of SCM440H low-alloy steel under long-term varying load

2010 ◽  
Vol 77 (11) ◽  
pp. 1963-1974 ◽  
Author(s):  
Yoshiyuki Kondo ◽  
Masanobu Kubota ◽  
Katsuya Shimada
Keyword(s):  
Crack Propagation ◽  
Alloy Steel ◽  
Low Alloy Steel

Effects of Crystallographic Orientation Relatiotionships on the Propagation of Brittle Crack in Mn-Mo-Ni Low Alloy Steel

2000 ◽  
Vol 6 (S2) ◽  
pp. 952-953
Author(s):  
Yong-Jun Oh ◽  
Min-Chul Kim ◽  
Jun-Hwa Hong
Keyword(s):  
Crack Propagation ◽  
Alloy Steel ◽  
Crystallographic Orientation ◽  
Deformation Mode ◽  
Bending Test ◽  
Low Alloy Steel ◽  
Brittle Crack ◽  
Compatibility Factor ◽  
Boundary Properties ◽  
Geometric Compatibility

Boundary properties between two adjacent grains with different crystallographic orientation relation are important factors in deciding the mechanical properties of materials. The concept of the geometric compatibility factor has been introduced in order to explain the relationship between transfer of deformation mode and crystal orientation. In the same manner, when the brittle crack propagates, grain boundary also obstructs crack propagation. Therefore it is also possible to introduce the concept of geometric compatibility considering the crystallographic orientation in analyzing the crack propagation.In this study, the characteristics of the brittle crack propagation in bainitic low alloy steel with compositions shown in table 1 have been investigated using EBSD analysis. A 3-point bending test was performed at -100°C and the secondary crack below fracture surface was analyzed in relation to the crystallographic orientation. In order to explain the behavior of crack propagation, modified geometric compatibility factor, M was introduced considering loading axis and crystallographic orientation relationship.

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