Effect of carbon content and helium gas environment on creep crack growth properties of Ni-26 pct Cr-17 pct W-0.5 pct Mo alloy at 1273 K

1995 ◽  
Vol 26 (2) ◽  
pp. 383-389 ◽  
Author(s):  
Masaaki Tabuchi ◽  
Yuji Nakasone ◽  
Toshio Ohba ◽  
Koichi Yagi ◽  
Tatsuhiko Tanabe
Keyword(s):  
Carbon Content ◽  
Crack Growth ◽  
Creep Crack Growth ◽  
Creep Crack ◽  
Helium Gas ◽  
Growth Properties ◽  
Gas Environment

scholarly journals Creep Crack Growth Behavior in Ni-Base Superalloys in 1,273 K Helium Gas Environment

1992 ◽  
Vol 29 (5) ◽  
pp. 422-426 ◽  
Author(s):  
Yuji NAKASONE ◽  
Keijiro HIRAGA ◽  
Tatsuhiko TANABE
Keyword(s):  
Crack Growth ◽  
Creep Crack Growth ◽  
Growth Behavior ◽  
Crack Growth Behavior ◽  
Creep Crack ◽  
Helium Gas ◽  
Gas Environment

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.

Experimental and numerical study on the relationship between creep crack growth properties and fracture mechanisms

2004 ◽  
Vol 35 (6) ◽  
Author(s):  
Masaaki Tabuchi ◽  
Jechang Ha ◽  
Hiromichi Hongo ◽  
Takashi Watanabe ◽  
Toshimitsu Yokobori
Keyword(s):  
Crack Growth ◽  
Numerical Study ◽  
Creep Crack Growth ◽  
Fracture Mechanisms ◽  
Creep Crack ◽  
Growth Properties ◽  
The Relationship

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

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

2005 ◽  
pp. 397-402
Author(s):  
Je Chang Ha ◽  
Joon Hyun Lee ◽  
Tabuchi Masaaki ◽  
A.Toshimitsu Yokobori
Keyword(s):  
Crack Growth ◽  
Creep Crack Growth ◽  
Rotor Steel ◽  
Creep Crack ◽  
Round Bar ◽  
Growth Properties

Creep crack growth properties for 12CrWCoB rotor steel using circular notched specimens

2004 ◽  
Vol 81 (5) ◽  
pp. 401-407 ◽  
Author(s):  
Jechang Ha ◽  
Masaaki Tabuchi ◽  
Hiromichi Hongo ◽  
A. Toshimitsu Yokobori ◽  
Akio Fuji
Keyword(s):  
Crack Growth ◽  
Creep Crack Growth ◽  
Rotor Steel ◽  
Creep Crack ◽  
Notched Specimens ◽  
Growth Properties

Comparison Between Crack Growth in Fracture Mechanics Specimens and Feature Component Tests Carried Out in a Low-Alloy Steel

1999 ◽  
Vol 122 (1) ◽  
pp. 40-44 ◽  
Author(s):  
Kamran Nikbin
Keyword(s):  
Fracture Mechanics ◽  
Crack Growth ◽  
Creep Crack Growth ◽  
Compact Tension ◽  
Growth Data ◽  
Good Correspondence ◽  
Creep Crack ◽  
Growth Properties ◽  
Circumferential Defects ◽  
Testing Condition

In both power generation plants and the chemical industries, there is a need to assess the significance of defects which may exist in high-temperature equipment operating in the creep range. This paper examines the methods of analysis used in laboratory creep crack growth data and their relevance to crack growth data derived from feature component tests which best simulate actual components under controlled testing condition. The material examined was a 214 Cr 1 Mo steel in the new condition at 550 and 600°C. The creep crack growth properties were determined on compact tension specimens. The data were compared with representative crack growth data from feature test components. These consisted of cracked rings, thick-walled cylinders, and thin-walled tubes containing axial or circumferential defects under combinations of axial and internal pressure loading. Little influence of size or temperature on the measured crack propagation rates was observed when the results were plotted against the creep fracture mechanics parameter C*. This is shown to be because the relevant condition had little effect on the appropriate crack tip creep ductilities of the material. Good correspondence was observed between the compact tension and the feature component tests, suggesting the feasibility of the C* method for predicting short-term laboratory tests using different geometries. [S0094-9930(00)01001-5]

Creep crack growth properties of P91 and P22 welded joints

2017 ◽  
Vol 40 (8) ◽  
pp. 1267-1275 ◽  
Author(s):  
A. Sedmak ◽  
M. Swei ◽  
B. Petrovski
Keyword(s):  
Crack Growth ◽  
Welded Joints ◽  
Creep Crack Growth ◽  
Creep Crack ◽  
Growth Properties
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