Results 211 to 220 of about 18,616 (264)

Strain hardening rate in relation to microstructure in precipitation hardening materials

Le Journal de Physique IV, 2000
The influence of microstructure on strain hardening is studied through Kocks-Mecking plots in a number of systems showing precipitation hardening: Al-Zn-Mg, Al-Mg-Si-Cu, and Fe-Cu. The presence of a supersaturated solid solution is shown to result in an extremely high work hardening rate, due to dynamic precipitation during the straining.
A. Deschamps, S. Esmaeili, W. J. Poole, M. Militzer   +3 more
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The strain-rate sensitivitity of flow stress and strain-hardening rate in metallic materials

Materials Science and Engineering: A, 1994
Abstract The objectives of the present investigation are to characterize the high strain rate (≅ 10 4 s −1 ) plastic flow behaviour of a number of metals and alloys and also to compare the dynamic flow behaviour with that at static strain rates (≅ 10 −2 s −1 ).
Y. Tirupataiah, G. Sundararajan
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Tensile instability and necking in materials with strain hardening and strain-rate hardening

Acta Metallurgica, 1977
Abstract An in-depth examination of tensile instability and necking in materials with strain hardening and strain-rate hardening has been made to clear up some recent controversies on this subject. A simplified analytical model presented here reveals that a preexisting geometric imperfection can grow from the outset of deformation (i.e.
openaire   +1 more source

Strain and strain-rate hardening characteristics of a superplastic AlLiCuZr alloy

Scripta Metallurgica, 1988
A number of alloys based on the composition of Al-Li-Zr have been shown to be superplastic under at least one of two different microstructural conditions: 1. fully recrystallized to a fine, stable grain size, and 2. warm- or cold-worked and unrecrystallized prior to superplastic deformation. For the latter case, static recrystallization was impaired by
B.A. Ash, C.H. Hamilton
openaire   +1 more source

Strain Hardening and Strain-Rate Sensitivity of an Extruded Magnesium Alloy

Journal of Materials Engineering and Performance, 2008
The strain-hardening behavior and strain-rate sensitivity of an extruded AZ31B magnesium alloy were determined at different strain rates between 10−2 and 10−5 s−1 in relation to the thickness of specimens (2.5 and 4.5 mm). Both the common approach and Lindholm’s approach were used to evaluate the strain-rate sensitivity. The yield strength (YS) and the
X.Z. Lin, D.L. Chen
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Strain-rate hardening behavior of superalloy IN718

Journal of Materials Processing Technology, 1997
Abstract In order to produce superior feed stock for the forging of turbine disks and other components, it is necessary to better understand the effect of deformation parameters on the hot deformation behavior of IN718 during thermomechanical processing. Superalloy IN718 is a strain-rate sensitive material.
J.M. Zhang, Z.Y. Gao, J.Y. Zhuang, Z.Y. Zhong, P. Janschek   +4 more
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Strain Hardening of AA5182-O Considering Strain Rate and Temperature Effect

2021
Strain hardening properties of AA5182-O metal sheet are experimentally studied and analytically modeled at different temperature in this research using a dogbone specimen. The strain rate hardening and thermal softening behaviors are then modeled by popular analytical models to consider the strain rate and thermal effects.
Hongchun Shang, Pengfei Wu, Yanshan Lou
openaire   +1 more source

On the strain rate and temperature dependence of hardening of copper

AIP Conference Proceedings, 1996
The objective of this paper is to present recent modifications to the Bodner-Partom viscoplastic equations for improved prediction of strain rate and temperature effects on the plastic flow behavior of metals. The thermal softening and strain hardening characteristics widely differ from metal to metal. For example, experimental results using the Kolsky
S. R. Bodner, A. M. Rajendran
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Modeling of hardening at very high strain rates

Journal of Applied Physics, 1994
A modification of the Bodner–Partom elastic-viscoplastic constitutive model is proposed to account for strain rate dependence of the evolution of hardening. The suggested procedure is for the rate of hardening in the hardening evolution equation to be a direct function of total strain rate.
S. R. Bodner, M. B. Rubin
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Strain Hardening and ‘Strain-Rate Hardening’

1982
The limitations of power-law strain hardening and ‘strain-rate hardening’ descriptions are reviewed. It is found that significant advantages can be gained by using, instead, the Voce relation, especially in the proposed modification that accounts for the rate sensitivities of flow stress and of strain hardening.
openaire   +1 more source