scholarly journals Effect of WC Grain Size Distribution on Steady State Creep Rate of WC-Co Based Cemented Carbide and Its Consideration

2008 ◽  
Vol 55 (8) ◽  
pp. 599-606
Author(s):  
Kenji Metoki ◽  
Hiroki Koike ◽  
Toshiyuki Takahashi ◽  
Koji Hayashi
Keyword(s):  
Grain Size ◽  
Steady State ◽  
Creep Rate ◽  
Size Distribution ◽  
Grain Size Distribution ◽  
Steady State Creep ◽  
Cemented Carbide ◽  
Steady State Creep Rate

Effect of grain size on the steady state creep rate of Inconel 718

1988 ◽  
Vol 22 (2) ◽  
pp. 255-260 ◽  
Author(s):  
Yafang Han ◽  
M.C. Chaturvedi ◽  
J.R. Cahoon
Keyword(s):  
Grain Size ◽  
Steady State ◽  
Creep Rate ◽  
Inconel 718 ◽  
Steady State Creep ◽  
Steady State Creep Rate

Compressive creep of YBa2Cu3Ox

1990 ◽  
Vol 5 (12) ◽  
pp. 2766-2770 ◽  
Author(s):  
K. C. Goretta ◽  
J. L. Routbort ◽  
A. C. Biondo ◽  
Y. Gao ◽  
A. R. de Arellano-López ◽  
...  
Keyword(s):  
Activation Energy ◽  
Grain Size ◽  
Steady State ◽  
Creep Rate ◽  
Steady State Creep ◽  
Steady State Creep Rate ◽  
Partial Pressures ◽  
Average Grain Size ◽  
Diffusional Flow ◽  
State Stress

YBa2Cu3Ox was deformed from 850 to 980 °C in oxygen partial pressures of 103 to 105 Pa. Steady-state creep rate, ̇, for P(O2) from 104 to 105 Pa could be expressed as ̇ = Aσ1.0 (GS)−2.8±0.6 exp −(970 ± 130 kJ/mole)/RT, where A is a constant, σ the steady-state stress, GS the average grain size, and R and T have their usual meanings, For P(O2) from 103 to 3 ⊠ 103 Pa, the activation energy decreased to about 650 kJ/mole and for a given temperature creep kinetics were much faster. The data and microscopic observations indicated that creep occurred by diffusional flow. Comparisons with diffusion data for YBa2Cu3Ox suggested that Y or Ba may be rate-controlling diffusing species.

On Statistical Properties of High Temperature Creep Rupture Data in STS304 Stainless Steels

2006 ◽  
Vol 326-328 ◽  
pp. 553-556
Author(s):  
Seon Jin Kim ◽  
Yu Sik Kong ◽  
Young Jin Roh ◽  
Won Taek Jung
Keyword(s):  
Steady State ◽  
Creep Rate ◽  
Stainless Steels ◽  
Probability Distributions ◽  
Creep Rupture ◽  
Steady State Creep ◽  
Rupture Time ◽  
Steady State Creep Rate ◽  
Rupture Data ◽  
Short Time

This paper deals with the statistical properties of short time creep rupture characteristic values (for example, creep rupture time, steady state creep rate, total creep rate, initial strain, etc.) in STS304 stainless steels. From short time creep rupture tests performed by constant stresses at three different elevated temperatures 600, 650 and 700, the scatter and probability distributions were investigated for rupture time, total creep rate, steady state creep rate, initial strain, and others. The effect of temperature on the statistical scatter of rupture time was the smallest at 700. The effect of stress on the statistical scatter of rupture time was smaller with increasing stresses. The probability distributions of short time creep rupture data were well followed 2-parameter Weibull.

On Creep Rupture Characteristics in STS304 Stainless Steels

2006 ◽  
Vol 326-328 ◽  
pp. 1309-1312
Author(s):  
Seon Jin Kim ◽  
Yu Sik Kong ◽  
Young Join Noh ◽  
Won Taek Jung ◽  
Sang Woo Kwon
Keyword(s):  
Steady State ◽  
Creep Rate ◽  
Stress Exponent ◽  
Stainless Steels ◽  
Elevated Temperatures ◽  
Creep Rupture ◽  
Steady State Creep ◽  
Rupture Time ◽  
Steady State Creep Rate ◽  
Creep Stress

In this study, the creep rupture tests of STS304 stainless steels were investigated at three different elevated temperatures of 600, 650 and 700 under the constant creep stresses. Creep rupture characteristics such as creep stress, creep rupture time, steady state creep rate and so on were evaluated. The behaviors of creep rate curve and initial strain are compared at three different elevated temperatures. The stress exponent (n) at 600, 650 and 700 based on steady state creep rate showed 22.5, 20.6 and 11.4 respectively. By increasing the temperature, the stress exponent is decreased. At the temperature of 700, the lowest stress exponents are shown and this behavior is also observed in the case of stress exponent based on rupture time. The creep life prediction by LMP method is presented and the equation of this result is as follows: T(logtr+20)=-0.005152-14.56+24126.

Coupled modeling of steady-state creep rate and creep rupture strength for metals

2008 ◽  
Vol 40 (4) ◽  
pp. 411-418
Author(s):  
N. A. Veklich ◽  
A. M. Lokoshchenko ◽  
P. N. Veklich
Keyword(s):  
Steady State ◽  
Creep Rate ◽  
Rupture Strength ◽  
Creep Rupture ◽  
Steady State Creep ◽  
Creep Rupture Strength ◽  
Steady State Creep Rate ◽  
Coupled Modeling

A Parametric Approach to Cyclic Creep

1976 ◽  
Vol 43 (1) ◽  
pp. 28-32
Author(s):  
V. M. Radhakrishnan
Keyword(s):  
Steady State ◽  
Creep Rate ◽  
Maximum Stress ◽  
Pure Aluminum ◽  
Cyclic Creep ◽  
Steady State Creep ◽  
Strain Accumulation ◽  
Parametric Approach ◽  
Steady State Creep Rate ◽  
Reference Stress

Investigations have been carried out to study the effect of oscillating stress on the strain accumulation in pure aluminum at elevated temperature. The creep rate under the oscillating stress has been found to increase with increasing value of the alternating component of the stress and is somewhat higher than the steady-state creep rate corresponding to the maximum stress, in the range of temperature used. The rupture time is inversely proportional to the cyclic creep rate. A model for obtaining the reference stress has been proposed and based on the data obtained, a parametric approach is presented.

On the effective stress dependence of the steady-state creep rate in SnPb eutectic

1974 ◽  
Vol 21 (2) ◽  
pp. K89-K91 ◽  
Author(s):  
R. Horiuchi ◽  
A. B. El-Sebai ◽  
M. Otsuka
Keyword(s):  
Steady State ◽  
Creep Rate ◽  
Effective Stress ◽  
Steady State Creep ◽  
Stress Dependence ◽  
Steady State Creep Rate
Sign in / Sign up

Export Citation Format

Share Document