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Development of dynamic recrystallization theory
Materials Science and Engineering: A, 2004Although hot working had been defined as deformation above the recrystallization temperature (determined after cold working), it was only about 1965 that dynamic recrystallization (DRX) was confirmed to be occurring during the deformation; two decades were required to clarify the similarities to, and the differences from, static recrystallization.
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Modeling the process of dynamic recrystallization
Metal Science and Heat Treatment, 1997A structural approach to modeling dynamic recrystallization is suggested. A model of nucleation and growth of recrystallized grains is considered with allowance for the special features of determination of the energy constants of the process of recrystallization. A relationship between the grain diameter, which is a very important structural parameter,
V. M. Leshchinskii, L. A. Ryabicheva
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Discontinuous dynamic recrystallization in α-Zr
Materials Science and Engineering: A, 2018Abstract This study attempts to identify the type of dynamic recrystallization (DRX) occurring in hot deformed zirconium. For this, samples of Zr were uniaxially compressed at 800 °C and 0.1 s−1 to varying strains. Microstructural characterization was done using electron back scatter diffraction (EBSD).
Rajeev Kapoor +2 more
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Dynamic Recrystallization Behavior of Pure Titanium
Advanced Materials Research, 2014The dynamic recrystallization of commercially pure titanium was investigated by compression tests on Gleeble-1500D thermal simulation test machine at temperature of 700950 °C and strain rate of 0. 015 s1. The total compression deformation is 0.7(true strain).
Juan Hua Su +3 more
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The Avrami kinetics of dynamic recrystallization
Acta Materialia, 2009Twenty-six flow curves determined under dynamic recrystallization (DRX) conditions on 11 different steels were analyzed. The double-differentiation method was used to define the critical strain ec for initiation of DRX. The “athermal” hardening parameter h and the dynamic recovery parameter r were evaluated from the work-hardening behavior prior to ec.
John J. Jonas +3 more
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Dynamic recrystallization in Al–7Mg alloy
Metal Science, 1983AbstractThe microstructural changes which occur during the extrusion of an Al–7Mg alloy have been investigated using optical and electron microscopy. Light microscopy has shown that recrystallized grains are present both at the original grain boundaries and within the grains, even at the breakthrough pressure. Electron microscopy has shown that a large
T. Sheppard, N. C. Parson, M. A. Zaidi
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Dynamic recrystallization in high purity aluminum
Scripta Materialia, 1997It is commonly believed, that Al doesn`t undergo dynamic recrystallization (DRX), although DRX has been proven to occur in all other investigated pure f.c.c. metals. The generally accepted explanation for the nonoccurrence of DRX in Al is that due to the high stacking fault energy in Al a stable dislocation arrangement is established by extensive ...
D. Ponge, M. Bredehöft, G. Gottstein
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Scripta Materialia, 2000
It is well-known that strain-induced grain growth is a characteristic feature of superplastic deformation (SPD) of various materials. Such grain growth has been observed over the whole investigated interval of strains in quasi-single phase superplastic aluminum alloys 7475, Neopral and 5083.
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It is well-known that strain-induced grain growth is a characteristic feature of superplastic deformation (SPD) of various materials. Such grain growth has been observed over the whole investigated interval of strains in quasi-single phase superplastic aluminum alloys 7475, Neopral and 5083.
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Dynamic recrystallization under changing loading conditions
Materials Science and Engineering, 1987Abstract The occurrence of dynamic recrystallization was investigated under changing deformation conditions, including changes of strain rate and strain path and the effect of annealing. It was found that dynamic recrystallization can be delayed by predeformation at a higher strain rate or facilitated by intermediate annealing, load cycling or strain
G. Gottstein, S. Deshpande
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New developments in geometric dynamic recrystallization
Materials Science and Engineering: A, 2005Abstract The concept of geometric dynamic recrystallization (GDX) originated in 1980s with work on elevated-temperature deformation aluminum to large strains. In this case, substantial grain refinement occurs through a process of grain elongation and thinning leading to a dramatic increase in grain boundary area.
M.E. Kassner, S.R. Barrabes
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