Results 251 to 260 of about 16,973 (297)
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Scripta Metallurgica, 1987
When dynamic recrystalllsatlon occurs during constant straln-rate tests, the stresswithin the sample tends to a steadyj or "saturation" value. This steady-state stress isassociated with a new, and constant mean grain size within the material. These effects arecaused by cycles of nucleatlon and recrystallisation which occur out-of-phase at numeroussites
Derby, B., Ashby, M. F.
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When dynamic recrystalllsatlon occurs during constant straln-rate tests, the stresswithin the sample tends to a steadyj or "saturation" value. This steady-state stress isassociated with a new, and constant mean grain size within the material. These effects arecaused by cycles of nucleatlon and recrystallisation which occur out-of-phase at numeroussites
Derby, B., Ashby, M. F.
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Dynamic recrystallization kinetics
Metal Science, 1979AbstractDynamic recrystallization in two austenitic stainless steels has been monitored by (i) observations of the high-temperature stress/strain behaviour, and (ii) metallographic measurements on rapidly quenched, partially reacted specimens. Particular effort has been put into assessing the influence of pre-existing grain size on the kinetics of ...
W. Roberts, H. Boden, B. Ahlblom
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Dynamic and Static Recrystallization
Advanced Engineering Materials, 2001Dynamic or static recrystallizations are certainly the main mechanisms responsible for the microstructure and texture changes occurring during or after deformation. New experimental devices to produce large strains (Equal Channel Angular Extrusion, ECAE) and to investigate the microstructures (orientation mapping by electron backscattering diffraction,
F. Montheillet +3 more
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Dynamic Recrystallization: The Dynamic Deformation Regime
Metallurgical and Materials Transactions A, 2007Severe plastic deformation (PD), especially involving high strain rates (>103 s–1), occurs through solid-state flow, which is accommodated by dynamic recrystallization (DRX), either in a continuous or discontinuous mode. This flow can be localized in shear instability zones (or adiabatic shear bands (ASBs)) with dimensions smaller than 5 μ, or can ...
L.E. Murr, C. Pizaña
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Dynamic Recrystallization of Torsion Deformed NiAl
Materials Science Forum, 2005Polycrystalline samples of NiAl have been deformed in torsion in the temperature range 800K – 1300K. Deformation is accompanied by dynamic recrystallization, which with increasing temperature changes from continuous to discontinuous mode. Emphasis was put on the occurrence of continuous dynamic recrystallization, which will be discussed with respect to
Klöden, B. +3 more
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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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Dynamic Recrystallization in Titanium Alloys
Key Engineering Materials, 2016The results of the investigations on five different titanium alloys were presented in this paper. Two two-phase α+β alloys (Ti-6Al-4V and Ti-6Al-2Sn-4Zr-6Mo) as well as two β alloys (Ti-10V-2Fe-3Al and Ti-3Al-8V-6Cr-4Mo-4Zr) were studied. Moreover, Ti-48Al-2Cr-2Nb intermetallic alloy (γ alloy) was also investigated.
Janusz Krawczyk +5 more
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Dynamic Recrystallization in Tial Alloys
MRS Proceedings, 1992TiAl alloys with Cr, V, and Nb additions show promise as high temperature materials due to their high temperature strength and modulus. Dynamic recrystallization has been shown to be important for the processing and superplastic forming of these materials.
D.S. Lee, D.M. Dimiduk, S. Krishnamurthy
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Dynamic recrystallization of zirconium carbide
Scripta Metallurgica, 1976Results of compression testing of ZrC are presented which show that in the range 1200 to 1800$sup 0$C these materials may undergo dynamic recrystallization. The predominant deformation mechanism near the yield stress is carbon diffusion-assisted motion of dislocations.
R. Darolia, T.F. Archbold
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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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