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Dynamic strain aging studied at the atomic scale
Acta Materialia, 2015Abstract Dynamic strain aging arises from the interaction between solute atoms and matrix dislocations in strained metallic alloy. It initiates jerky dislocation motion and abrupt softening, causing negative strain rate sensitivity. This effect leads to instable flow phenomena at the macroscopic scale, appearing as a serrated stress–strain response ...
Hishām Aboulfadl +2 more
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Dynamic strain aging in DP1000: Effect of temperature and strain rate
Materials Science & Engineering A: Structural Materials: Properties, Microstructure and Processing, 2022Sarath Chandran +2 more
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The strain dependence of static and dynamic strain-aging
Acta Metallurgica, 1982Abstract A model is proposed that combines possible aging effects on the friction stress and on forest hardening. The dependence of both static and dynamic strain-aging on strain is predicted and compared with available experimental information.
A. Van Den Beukel, U.F. Kocks
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Dynamic strain ageing in titanium
Journal of the Less Common Metals, 1968Abstract Tensile and fatigue tests have been carried out on commercial purity titanium at temperatures in the range from room temperature to 450 °C. The tensile stress-strain curves obtained at two strain rates showed the gradual development of discontinuous yielding as the temperature of the test increased.
N.G. Turner, W.T. Roberts
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Dynamic strain ageing in CuNiSn alloys
Czechoslovak Journal of Physics, 1988Dynamic strain ageing in CuNiSn alloys is measured by strain rate sensitivity of quieted flow stress. Strain dependence of dynamic ageing is ascribed to friction part of the flow stress.
J. Balík, M. Janeček, J. Mencl
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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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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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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 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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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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