scholarly journals Steady state creep characteristics of Fe--3.5 at% Mo alloy at high temperatures

1973 ◽  
Author(s):  
H. Oikawa ◽  
S. Karashima ◽  
M. Maeda
Keyword(s):  
Steady State ◽  
High Temperatures ◽  
Steady State Creep ◽  
Creep Characteristics

scholarly journals Steady-State Creep of Fe-4.1 at%Mo Alloy at High Temperatures

1980 ◽  
Vol 21 (5) ◽  
pp. 309-318 ◽  
Author(s):  
Hiroshi Oikawa ◽  
Makoto Saeki ◽  
Seiichi Karashima
Keyword(s):  
Steady State ◽  
High Temperatures ◽  
Steady State Creep

scholarly journals Transversely Isotropic Creep Characteristics and Damage Mechanism of Layered Phyllite Under Uniaxial Compression Creep Test

2021 ◽  
Author(s):  
Jiabing Zhang ◽  
Xiaohu Zhang ◽  
Zhen Huang ◽  
Helin Fu
Keyword(s):  
Steady State ◽  
Uniaxial Compression ◽  
Creep Deformation ◽  
Transversely Isotropic ◽  
Damage Mechanism ◽  
Steady State Creep ◽  
Creep Stage ◽  
Compression Creep ◽  
Bedding Angle ◽  
Creep Characteristics

Abstract The layered surrounding rocks of deep tunnels undergo large creep deformation due to the presence of planes of weakness and the presence of prolonged high in-situ stress, thereby the deformation severely endangers the safety of tunnels. This study conducts uniaxial compression creep tests to experimentally investigate the transversely isotropic creep characteristics and the damage mechanism of layered phyllite samples having bedding angles of 0°, 22.5°, 45°, 67.5°, and 90°. The results indicate that the creep deformation of the specimens takes place in four stages: the instantaneous elastic deformation stage, the deceleration creep stage, the steady-state creep stage, and the accelerated creep stage. The cumulative creep deformation and the creep time during the steady-state creep stage of the specimens initially decrease and then increase as the bedding angle changes from 0° to 90°, thereby, corresponding to the initial increase and subsequent decrease in creep rate during the deceleration creep stage. Based on the existing viscoelastic-plastic damage creep model, the creep parameters E1, E2, η2, and η3 are observed to initially decrease and then increase with the increase in bedding angle, hence demonstrating that the creep characteristics and damage mechanism of the layered rock mass are controlled by the effect of the natural weakness planes and show significant transversely isotropic characteristics.

Steady-State Creep Analysis of the Weight Loadings of Furnace Tubes on Multiple Supports

1959 ◽  
Vol 81 (2) ◽  
pp. 115-125
Author(s):  
J. L. Jacobowitz ◽  
C. K. Mader
Keyword(s):  
Steady State ◽  
Internal Pressure ◽  
High Temperatures ◽  
Tube Wall ◽  
Steady State Creep ◽  
Design Consideration ◽  
Secondary Effects ◽  
Creep Stress ◽  
Creep Analysis ◽  
Very High

Analysis of creep stress-strain relationships is made for horizontally supported furnace tubes including the effect of tube weight and internal pressure. Steady-state creep effects through the tube wall due to axially symmetrical heal input are also analyzed for these conditions. The original Bailey approach to the pressure problem only is extended to the larger scope undertaken. Maximum permissible tube spans are derived based on accepted criteria for creep stress and deflections. The results of this work indicate that maximum allowable tube spans may often be theoretically increased beyond present usual design limits except for a few specific materials and instances where short spans are required at very high temperatures. In actual tube design, consideration should be given to experience in operation of any particular type of furnace so that secondary effects may be minimized. Increased economies in costs and flexibility in furnace layout as well as rational span determination are expected from use of these results.

Effect of Zn addition on steady state creep characteristics of Sn–3·3Ag solder alloy

2008 ◽  
Vol 24 (4) ◽  
pp. 488-494 ◽  
Author(s):  
A. Fawzy ◽  
N. Habib ◽  
M. Sobhy ◽  
E. Nassr ◽  
G. Saad
Keyword(s):  
Steady State ◽  
Solder Alloy ◽  
Steady State Creep ◽  
Zn Addition ◽  
Creep Characteristics

Microstructure changes and steady state creep characteristics in Pb-Sn alloys during transformation

1991 ◽  
Vol 41 (8) ◽  
pp. 785-792 ◽  
Author(s):  
M. S. Sakr ◽  
A. Z. Mohamed ◽  
M. M. A. Shehab ◽  
A. H. Bassyouni
Keyword(s):  
Steady State ◽  
Steady State Creep ◽  
Microstructure Changes ◽  
Creep Characteristics
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