Role of microstructure and residual stresses on fatigue crack initiation of carbonitrided steels

1989 ◽  
Vol 60 (8) ◽  
pp. 370-374
Author(s):  
Jacky Lesage ◽  
Didier Chicot ◽  
Mohamed Al Karaishi
Keyword(s):  
Fatigue Crack ◽  
Crack Initiation ◽  
Residual Stresses ◽  
Fatigue Crack Initiation

scholarly journals Influence of local residual stresses on fatigue crack initiation

2021 ◽  
Vol 31 ◽  
pp. 3-7
Author(s):  
M. Mlikota ◽  
S. Schmauder ◽  
K. Dogahe ◽  
Ž. Božić
Keyword(s):  
Fatigue Crack ◽  
Crack Initiation ◽  
Residual Stresses ◽  
Fatigue Crack Initiation

scholarly journals The role of oxidation damage in fatigue crack initiation of an advanced Ni-based superalloy

2015 ◽  
Vol 81 ◽  
pp. 265-274 ◽  
Author(s):  
S. Cruchley ◽  
H.Y. Li ◽  
H.E. Evans ◽  
P. Bowen ◽  
D.J. Child ◽  
...  
Keyword(s):  
Fatigue Crack ◽  
Crack Initiation ◽  
Fatigue Crack Initiation ◽  
Oxidation Damage

The role of extrusions and intrusions in fatigue crack initiation

2017 ◽  
Vol 185 ◽  
pp. 46-60 ◽  
Author(s):  
J. Polák ◽  
V. Mazánová ◽  
M. Heczko ◽  
R. Petráš ◽  
I. Kuběna ◽  
...  
Keyword(s):  
Fatigue Crack ◽  
Crack Initiation ◽  
Fatigue Crack Initiation

Fatigue crack initiation in Hastelloy X - the role of boundaries

2013 ◽  
Vol 36 (8) ◽  
pp. 809-826 ◽  
Author(s):  
W. Abuzaid ◽  
A. Oral ◽  
H. Sehitoglu ◽  
J. Lambros ◽  
H. J. Maier
Keyword(s):  
Fatigue Crack ◽  
Crack Initiation ◽  
Fatigue Crack Initiation ◽  
Hastelloy X

Welding Residual Stresses in Tubular Joints

2013 ◽  
Vol 768-769 ◽  
pp. 605-612 ◽  
Author(s):  
Majid Farajian ◽  
Thomas Nitschke-Pagel ◽  
Klaus Dilger
Keyword(s):  
Residual Stress ◽  
Fatigue Crack ◽  
Crack Initiation ◽  
Residual Stresses ◽  
Structural Integrity ◽  
Fatigue Crack Initiation ◽  
Welding Residual Stress ◽  
Structural Safety ◽  
Welding Parameters

In spite of an increased awareness of welding residual stress threat to structural integrity, the extent of its influence on fatigue especially under multiaxial loading is still unclear and is a matter of debate. One important reason for this lack of clarities is that the determination of the initial welding residual stress field in welded structures even at the fatigue crack initiation sites is difficult and requires complementary instruments. Since the fatigue crack initiation in sound welds almost always occurs on the surface, the determination of surface residual stresses could increase the awareness of the extent of their threat to the structural safety. In this paper the development of residual stresses in different TIG-welded tubular specimens out of S355J2H and S690QL steel is studied and compared. The mechanisms of the development of residual stresses based on heat input and cooling rate are discussed. The welding parameters and thus heat inputs are varied and the mechanisms leading to different residual stress states are investigated. X-ray method was used for residual stress state characterization.

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