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Constitutive Model for Metals With Dynamic Strain Aging
Mechanics of Materials, 2019Abstract In this paper, a modified constitutive relation to model the dynamic strain aging phenomenon is proposed based on the previous model of Voyiadjis-Abed. The dynamic strain aging phenomenon is typically observed in metals for a certain range of strain rates and temperatures.
Yooseob Song +2 more
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Pathogen population dynamics: the age of the strain
Trends in Microbiology, 2001Abstract The Workshop on Evolutionary Epidemiology of Strain Structure in Pathogen Populations was held in the Dept of Biological Sciences and Mathematics Institute, University of Warwick, UK, 15–17 January 2001.
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Hydrogen and Dynamic Strain-Ageing in Ferrite
Metal Science, 1974AbstractUsing a high-temperature microhardness tester capable of operating under substantial hydrogen pressures, it has been established that the presence of the hydrogen causes a diminution of the normal dynamic strain-ageing peak hardness in ferritic materials.
K. B. Gove, J. A. Charles
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Dynamic strain ageing as a strengthening mechanism
Materials Science and Engineering, 1972Abstract Pre-strain in the dynamic strain ageing temperature region is compared with multiple-mechanical-thermal treatment (mmtt) as a strengthening mechanism. It is shown that the dynamic strain ageing treatment (dsat) gives equivalent or better strength than mmtt.
D.J Lloyd, K Tangri
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A TECHNIQUE TO PROBE DYNAMIC STRAIN AGEING
1993A technique based on the ramped oscillatory test was developed to probe dynamic strain ageing. Frequency responses of the flow stress and strain rate associated with ramped oscillatory tests were recorded in an Al-Mg-Si alloy. In the regime of dynamic strain ageing, the frequency responses were observed to undergo a fundamental change with increasing ...
C.P. Ling, P.G. McCormick, Y. Estrin
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Dynamic strain ageing in mild steel
Acta Metallurgica, 1966Abstract The grain size dependence of the yield and flow stresses for mild steel have been investigated over the temperature range 20°C2–400°C and dislocation densities of fine grained specimens have also been measured over the same temperature interval.
B.J Brindley, J.T Barnby
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Dynamic strain aging and the role of the Cottrell atmosphere
Physical Review Materials, 2022We have developed an atomistic kinetic Monte Carlo (kMC) model describing carbon diffusion, trapping and detrapping in the stress field generated by a 1/2[111] screw dislocation in bcc iron. By performing long time scale carbon diffusion simulations we study the formation of carbon Cottrell atmospheres around screw dislocations at different ...
I. H. Katzarov +5 more
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Dynamic Strain Aging of Various Steels
Metallurgical Transactions A, 1982The dynamic strain aging characteristics of two dual phase steels, a high strength low alloy (HSLA) steel, a 1008 steel and an interstitial free (IF) steel were determined from tensile properties at temperatures in the range 295 to 460 K (22 to 187 °C) and strain rates between 6 × 10-6 to 10-2s-1. All except the IF steel were found to be susceptible to
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Dislocation dynamics in strain aging alloys
Acta Metallurgica et Materialia, 1992Abstract The problem of dynamic strain aging is treated using a new approach to the aging kinetics. The moving dislocations are considered as an ensemble of double loops which overcome the forest dislocations by thermal activation. This implies an exponential distribution of waiting times in front of the obstacles during which additional pinning ...
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Dynamic strain aging in aluminum alloys
Materials Science and Engineering, 1974Abstract The athermal component of flow stress, as it is normally determined, is frequently in error for polycrystalline alloys of aluminum. The reason is that a transient occurs in the flow stress-deformation temperature curve for these alloys the character of which is a result of dynamic strain aging.
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