A study on fracture surface of aged turbine rotor steel by fractal dimension

2001 ◽  
Vol 15 (10) ◽  
pp. 1417-1422 ◽  
Author(s):  
Amkee Kim ◽  
Seung Hoon Nahm
Keyword(s):  
Fractal Dimension ◽  
Fracture Surface ◽  
Turbine Rotor ◽  
Rotor Steel

Fractal dimension of the fracture surface of porous ZrO2 – MgO composite

2020 ◽  
pp. 74-82
Author(s):  
A. S. Buyakov ◽  
◽  
Yu. A. Zenkina ◽  
S. P. Buyakova ◽  
S. N. Kulkov ◽  
...  
Keyword(s):  
Fractal Dimension ◽  
Fracture Surface

Fractal Dimension of the Fracture Surface of Porous ZrO2–MgO Composite

2020 ◽  
Vol 11 (5) ◽  
pp. 1253-1259
Author(s):  
A. S. Buyakov ◽  
Yu. A. Zenkina ◽  
S. P. Buyakova ◽  
S. N. Kulkov
Keyword(s):  
Fractal Dimension ◽  
Fracture Surface

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.

Microstructures and Properties of Ultra-Narrow-Gap Multi-Pass Welded Joint of 50 mm Turbine Rotor Steel by Laser Welding with Filler Wire

2015 ◽  
Vol 42 (2) ◽  
pp. 0203007
Author(s):  
赵勇 Zhao Yong ◽  
王清曌 Wang Qingzhao ◽  
黄坚 Huang Jian ◽  
吴毅雄 Wu Yixiong
Keyword(s):  
Laser Welding ◽  
Welded Joint ◽  
Turbine Rotor ◽  
Rotor Steel ◽  
Filler Wire ◽  
Narrow Gap

scholarly journals Creep Fracture Mechanism Map and Creep Damage of Cr–Mo–V Turbine Rotor Steel

2006 ◽  
Vol 46 (10) ◽  
pp. 1516-1522 ◽  
Author(s):  
Norio Shinya ◽  
Junro Kyono ◽  
Hideaki Kushima
Keyword(s):  
Fracture Mechanism ◽  
Creep Damage ◽  
Turbine Rotor ◽  
Rotor Steel ◽  
Creep Fracture

Fractal dimension of fracture surface and superplasticity of 7475 Al alloy

1993 ◽  
Vol 12 (20) ◽  
pp. 1616-1618 ◽  
Author(s):  
J. Xinggang ◽  
C. Jianzhong ◽  
M. Longxiang
Keyword(s):  
Fractal Dimension ◽  
Fracture Surface ◽  
Al Alloy

scholarly journals Low cycle fatigue modelling of a steam turbine rotor steel

2019 ◽  
Vol 23 ◽  
pp. 149-154
Author(s):  
Ahmed Azeez ◽  
Robert Eriksson ◽  
Mattias Calmunger ◽  
Stefan B. Lindström ◽  
Kjell Simonsson
Keyword(s):  
Steam Turbine ◽  
Low Cycle Fatigue ◽  
Turbine Rotor ◽  
Rotor Steel ◽  
Cycle Fatigue ◽  
Steam Turbine Rotor
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