A novel methodology for determining creep crack initiation and growth properties using FEM with notched small punch specimens

2021 ◽  
Vol 116 ◽  
pp. 103112
Author(s):  
Yingzhi Li ◽  
Petr Dymacek ◽  
Roger Hurst ◽  
Paul Stevens
Keyword(s):  
Crack Initiation ◽  
Small Punch ◽  
Creep Crack ◽  
Growth Properties

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

Estimation of Creep Crack Growth Properties Using Circumferential Notched Round Bar Specimen for 12CrWCoB Rotor Steel

2005 ◽  
Vol 297-300 ◽  
pp. 397-402
Author(s):  
Je Chang Ha ◽  
Joon Hyun Lee ◽  
Masaaki Tabuchi ◽  
A.Toshimitsu Yokobori Jr.
Keyword(s):  
Crack Growth ◽  
Axial Stress ◽  
Creep Crack Growth ◽  
Turbine Rotor ◽  
Rotor Steel ◽  
Creep Ductility ◽  
Crack Growth Behaviour ◽  
Creep Crack ◽  
Round Bar ◽  
Growth Properties

Most heat resisting materials in structural components are used under multi-axial stress conditions and under such conditions ductile materials often exhibit brittle manner and low creep ductility at elevated temperature. Creep crack initiation and growth properties are also affected by multi-axial stress and it is important to evaluate these effects when laboratory data are applied to structural components. Creep crack growth tests using circumferential notched round bar specimens are a simple method to investigate multi-axial stress effects without using complicated test facilities. Creep crack growth tests have been performed using a 12CrWCoB turbine rotor steel. In order to investigate the effects of multi-axial stress on creep crack growth properties, the tests were conducted for various notch depths at 650°C. The circumferential notched round bar specimen showed brittle crack growth behaviour under multi-axial stress conditions. Creep crack growth rate was characterized in terms of the C* parameter. A 12CrWCoB turbine rotor steel has been tested using circumferential notched round bar specimens with different multi-axiality. Circumferential notched round bar specimens show increased brittle creep crack growth behaviour due to the multi-axial stress condition. Creep crack growth properties could be predicted by allowing for the decrease of creep ductility under multi-axial conditions.

scholarly journals Creep Crack Growth Test Method and Creep Crack Growth Properties for TiAl Intermetallic Compound.

2000 ◽  
Vol 49 (1) ◽  
pp. 80-85 ◽  
Author(s):  
Masaaki TABUCHI ◽  
Toshimitu YOKOBORI ◽  
Akio FUJI ◽  
Kiyoshi KUBO ◽  
Koichi YAGI ◽  
...  
Keyword(s):  
Intermetallic Compound ◽  
Crack Growth ◽  
Creep Crack Growth ◽  
Test Method ◽  
Creep Crack ◽  
Growth Test ◽  
Tial Intermetallic Compound ◽  
Growth Properties
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