Bestimmung von Kriechrißeinleitung und Kriechrißwachstum an einem 1 wt.% CrMoV-Stahl mit Hilfe des Potentialsonden-Verfahrens / Determination of creep crack initiation and growth of an 1 wt. % CrMovV steel with aid of the potential drop method / Détermination d’initiation et de croissance de fissuration au fluage dans une acier 1 wt.% CrMoV au moyen de méthode potential

1983 ◽  
Vol 25 (12) ◽  
pp. 429-433
Author(s):  
H. Kockelmann ◽  
Li Zili ◽  
K. Maile
Keyword(s):  
Crack Initiation ◽  
Potential Drop ◽  
Drop Method ◽  
Creep Crack

Determination of J-R Curves for A285 Carbon Steel Using Normalization Method

2006 ◽  
Author(s):  
X. K. Zhu ◽  
Y. J. Chao ◽  
P. S. Lam
Keyword(s):  
Carbon Steel ◽  
Crack Length ◽  
Electric Potential ◽  
Potential Drop ◽  
Normalization Method ◽  
Resistance Curve ◽  
Drop Method ◽  
Basic Procedure ◽  
Crack Tip Constraint

The normalization method is adopted and extended in this paper to develop J-R curves for standard and nonstandard specimens directly from load versus load-line displacement test data without the need for online crack length measurement. A set of single edge notched bend (SENB) specimens with different crack lengths for an A285 carbon steel are tested according to the guideline of ASTM standard E1820, and the ability of normalization method is then demonstrated in determination of crack-tip constraint-dependent J-R curves for the SENB specimens. The results show that the normalization method can be used to determine J-R curves for the standard as well as nonstandard specimens. The resistance curve procedure and the basic procedure specified in ASTM E1820 are evaluated, and a modified basic procedure is also presented for determining the J-integral. Comparisons of the resulting J-R curves indicate that the modified basic procedure can be equivalent to the resistance curve procedure. To validate the normalization method, the conventional electric potential drop method is used to monitor crack growth and to determine the J-R curves for the A285 steel. Two equations used in the potential drop method, i.e. linear and nonlinear relationships between the crack length and the electric potential, are employed to determine the crack length during the fracture testing. It shows that the J-R curves determined with the normalization method are in good agreement with those based on the potential drop methods for all specimens considered.

scholarly journals Improvements in the measurement of creep crack initiation and growth using potential drop

2018 ◽  
Vol 134 ◽  
pp. 229-248 ◽  
Author(s):  
K.M. Tarnowski ◽  
K.M. Nikbin ◽  
D.W. Dean ◽  
C.M. Davies
Keyword(s):  
Crack Initiation ◽  
Potential Drop ◽  
Creep Crack

scholarly journals Study of Hot Salt Stress Corrosion Crack Initiation of Alloy IMI 834 by using DC Potential Drop Method

2016 ◽  
Vol 15 (5) ◽  
pp. 203-208
Author(s):  
Mangesh D. Pustode ◽  
Bhupendra Dewangan ◽  
V.S. Raja ◽  
Neeta Paulose ◽  
Narendra Babu
Keyword(s):  
Salt Stress ◽  
Crack Initiation ◽  
Stress Corrosion ◽  
Stress Corrosion Crack ◽  
Potential Drop ◽  
Drop Method ◽  
Dc Potential ◽  
Imi 834

Determination of the creep crack initiation properties using pre-cracked small punch tests

2016 ◽  
Vol 86 ◽  
pp. 39-44 ◽  
Author(s):  
J.M. Alegre ◽  
I.I. Cuesta ◽  
C. Rodriguez ◽  
F.J. Belzunce
Keyword(s):  
Crack Initiation ◽  
Small Punch ◽  
Creep Crack

Analysis of 316H Creep Crack Initiation Data at 550℃ using A Crack Tip Constraint Parameter

2021 ◽  
pp. 107746
Author(s):  
Seung-Ho Lee ◽  
Hyun-Woo Jung ◽  
Yun-Jae Kim ◽  
Kamran Nikbin ◽  
Robert A. Ainsworth
Keyword(s):  
Crack Initiation ◽  
Crack Tip ◽  
Creep Crack ◽  
Crack Tip Constraint
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