Results 271 to 280 of about 99,604 (299)

The transitional behaviour of the minimum creep rate of β-cobalt

Philosophical Magazine, 1964
Abstract Published data (Feltham and Myers 1963) on the second stage, minimum creep rate of β-cobalt have been analysed for stress and temperature dependence. Three distinct stress functions and activation energies connected by regions of transition were found which behaved as parallel or additive processes over the temperature range of 450 to 750°C ...
J. E. Flinn, E. R. Gilbert
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A Datum Temperature Calibration Approach for Long-Term Minimum-Creep-Strain-Rate and Stress-Rupture Prediction Using Sine-Hyperbolic Creep-Damage Model

Volume 4A: Materials and Fabrication, 2022
Abstract This study introduces a datum temperature (DT) calibration approach for improved extrapolation of minimum-creep-strain-rate (MCSR) and stress-rupture (SR) data. The ASME B&PV code III outlines stringent requirements for the approval of materials where each heat is to be tested to 10,000+ hours to be qualified for service ...
Md Abir Hossain, Mohammad Shafinul Haque, Calvin M. Stewart   +2 more
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Relationship between minimum creep rate and time to fracture for 2:%Cr-1%Mosteel

Metal Science, 1978
Abstract Plain carbon and low alloy ferritic steels are used extensively in modern electrical power generation plant for components which operate at elevated temperatures, ∼ 0.5T M, and low stresses where creep is the major deformation mode.
D. Lonsdale, P. E. J. Flewitt
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Strain Relaxation and Recovery Test (SRRT) on Waspaloy for Measuring Irreversible Strain Rate Equivalent to Minimum Creep Rate

Canadian Aeronautics and Space Journal, 2003
is shown that the stress dependence of the irreversible, average viscous strain rate during decelerating (primary) creep measured by the Strain Relaxation and Recovery Test (SRRT), from 725 to 315 MPa, corresponds well with that of the minimum creep rate in the stress range 650450 MPa for forged nickel-based Waspaloy at 732 °C (0.62Tm).
N K Sinha, T. Terada, P. Au
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Comparison of Cu and Ti–52Al in creep at the same homologous temperature and minimum creep rate

Intermetallics, 2001
Abstract The present work discusses conditions of comparable creep behaviour of a metal (copper) and an intermetallic compound (Ti–52Al). It compares three “similar” creep curves obtained at the same homologous temperature and showing the same minimum creep rate.
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Minimum Creep Rate From Primary Creep Using SRRT

2009
unclassified
Sinha, Nirmal K., Terada, Tak, Au, P.
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Stress Exponent of Minimum Creep Rate of Single Crystal Nickel-Based Superalloy, CMSX-4, AT 1273K

Materials Science Forum, 2007
The stress exponent of the minimum creep rate, the n value, of a single crystal nickel-based superalloy, CMSX-4, was investigated by conducting the creep tests in a wide stress range at 1273K. At stresses more than 250MPa, the n value was defined as about 7. However, the n value decreased with decreasing stress and reached to 3 in the stress range from
Y. Kondo, N. Miura, Takashi Matsuo
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Extrapolation of Imaginal Minimum Creep Rate in Compression by a Concept of SATO-Index

Key Engineering Materials, 2017
Creep characteristics of alloys and compounds have been evaluated mainly by the minimum creep rate or the steady-state creep rate, and by its stress and temperature dependences. In some cases, however, direct comparison of the minimum creep rate or the steady-state creep rate are not practically easy due to difficulties of experiment, i.e., a long ...
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Minimum strain rate and primary transient creep analysis of a fine structure orthorhombic titanium aluminide

Scripta Materialia, 1996
The purpose of the present paper is to present a preliminary analysis of the primary transient creep behavior of an orthorhombic titanium aluminide having a very fine microstructure. In order to analyze and understand the creep behavior within the primary transient regime it is necessary to understand the mechanisms controlling deformation within the ...
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On the nature of the minimum creep rate – time correlation for soil, ice, and frozen soil

Canadian Geotechnical Journal, 1983
This technical note examines the nature and consequences of the linear correlation observed between the logarithm of the minimum creep rate, [Formula: see text] and the logarithm of the time to reach this minimum creep rate, tm, in soil, ice, and frozen soil.
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