Brittle Fracture Characteristics of Multiple Notches in Parallel and Parallel-staggered Arrangement

Author(s):  
Hiroshi MAENAKA ◽  
Shigeru KITAMURA ◽  
Kin-ichi NAGAI ◽  
Kazuo IKEDA ◽  
Katsuya KAJIMOTO ◽  
...  
1993 ◽  
Vol 03 (C7) ◽  
pp. C7-93-C7-95
Author(s):  
N. S. WRIGLEY ◽  
G. JOLLEY ◽  
J. J. BUTLER

1995 ◽  
Vol 43 (6) ◽  
pp. 2275-2285 ◽  
Author(s):  
P.N.B. Anongba ◽  
S. Oberli ◽  
S.G. Steinemann

2012 ◽  
Vol 197 ◽  
pp. 798-801
Author(s):  
Yu Rong Jiang ◽  
Mei Bao Chen

It is impossible to keep pipelines free from defects in the manufacturing, installation and servicing processes. In this paper, pre-tension deformation of X60 pipeline steel was employed to experimentally simulate the influence of dents and the mechanism of fatigue crack initiation of X60 pipeline steel after per-tension deformation under cyclic loading were investigated. The results indicate that the mechanism of fatigue crack initiation is the typical cleavage fracture characteristics and the cracks mainly initiates from the non-metallic inclusions which was the local brittle fracture materials such as MnS inclusion. With the pre-tension deformation increase, the yield strength of the matrix was increased and the toughness decreased due to the work-hardening effect. With the effects of the non-metallic inclusions larger, the fatigue cracks initiated from the non-metallic inclusions easier.


Author(s):  
Qingren Xiong ◽  
Chunyong Huo ◽  
Shaotao Gong ◽  
Jinheng Luo ◽  
Jiming Zhang ◽  
...  

The fracture characteristics of several types of tensile specimens of 9%Ni steel at low temperature was studied, and the Notch (Crack) Sensitivity and Notch (Crack) Relative Strength decreased (increased) Ratio of notch (crack) specimen were studied, while the crack preparation method of the crack specimen was discussed. The results indicate that the Notch (Crack) Sensitivity and Notch (Crack) Relative decreased (increased) Ratio can be used to evaluate the low temperature low stress brittle fracture resistance of the material. 9%Ni steel has good brittle fracture resistance at low temperature. The crack preparation principle of the crack tensile specimen was put forward.


2017 ◽  
Vol 138 ◽  
pp. 139-144 ◽  
Author(s):  
Dipankar Ghosh ◽  
Mahesh Banda ◽  
Sashanka Akurati ◽  
Hyungsuk Kang ◽  
Vivian O. Fakharizadeh

2014 ◽  
Vol 20 (S3) ◽  
pp. 1862-1863
Author(s):  
D.F. Susan ◽  
N.R. Sorensen ◽  
J.R. Michael ◽  
A.C. Kilgo ◽  
G.L. Clark

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