25 Year Perspective Recent developments in analysis of high temperature creep and creep fracture behaviour

2010 ◽  
Vol 26 (11) ◽  
pp. 1332-1337 ◽  
Author(s):  
S. J. Williams ◽  
M. R. Bache ◽  
B. Wilshire
Keyword(s):  
High Temperature ◽  
Fracture Behaviour ◽  
High Temperature Creep ◽  
Creep Fracture ◽  
Temperature Creep ◽  
Recent Developments

Study on the High Temperature Creep Behavior of 30Cr25Ni20 Heat-Resistant Steel

2019 ◽  
Vol 814 ◽  
pp. 157-162
Author(s):  
You Yang ◽  
Xiao Dong Wang ◽  
Wei Feng Tang
Keyword(s):  
High Temperature ◽  
Internal Structure ◽  
Creep Strain ◽  
High Temperature Creep ◽  
Resistant Steel ◽  
Heat Resistant Steel ◽  
Creep Fracture ◽  
Heat Resistant ◽  
Temperature Creep ◽  
Before And After

The high temperature creep test of heat-resisting steel 30Cr25Ni20 for automobile exhaust manifolds was carried out, and the creep strain-time curves at 650°C and 700°C in the different loads were obtained. The effects of different creep temperature and stress on creep life of materials were studied. The microstructure of the fracture after creep was observed by scanning electron microscopy. Microstructures before and after creep at different temperatures were compared by optical microscopy. The results show that the creep fracture life of heat-resistant steel decreases with the increase of stress at the same temperature. The creep fracture life decreases with the increase of temperature at the same stress, too. The fracture of heat-resistant steel shows good high temperature plasticity and a ductile fracture after creep. The fracture dimples become deeper with the increase of stress. At 650°Cand 700°C, the stress exponent is 8.6 and 6, respectively. When the sample was subjected to high temperature creep at 700°C, the precipitates increase obviously and the reticular structure became very large. At this point, the internal structure of the material is destroyed, and the matrix structure becomes unevenly distributed. The failure of the internal structure leads to the dramatic increase of the creep strain, and the failure of the internal structure will be more serious with the deformation of the sample.

A characterization of high temperature creep fracture life for ceramics

1996 ◽  
Vol 15 (22) ◽  
pp. 2002-2007 ◽  
Author(s):  
A. Toshimitsu Yokobori ◽  
T. Yokobori ◽  
K. Yamazaki
Keyword(s):  
High Temperature ◽  
High Temperature Creep ◽  
Creep Fracture ◽  
Temperature Creep
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