scholarly journals Effect of Torsional Oscillations and Aging Time on the Steady State creep Characteristics of Cu-2 wt% Be-0.3 wt% Co alloy

2014 ◽  
Vol 37 (1) ◽  
pp. 59-72
Keyword(s):  
Steady State ◽  
Aging Time ◽  
Steady State Creep ◽  
Torsional Oscillations ◽  
Creep Characteristics

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.

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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