Journal ArticleDOI
Characteristics of superplasticity domain in the processing map for hot working of an Al alloy 2014---20vol.%Al2O3 metal matrix composite
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In this paper, a hot working of Al alloy 2014-20vol.% Al2O3 particulate-reinforced cast-plus-extruded composite material has been generated covering the temperature range 300-500 degrees C and the strain rate range 0.001-10 s−1.Abstract:
The processing map for hot working of Al alloy 2014-20vol.%Al2O3 particulate-reinforced cast-plus-extruded composite material has been generated covering the temperature range 300-500 degrees C and the strain rate range 0.001-10 s(-1) based on the dynamic materials model. The efficiency eta of power dissipation given by 2m/(m + 1), where m is the strain rate sensitivity, is plotted as a function of temperature and strain rate to obtain a processing map. A domain of superplasticity has been identified, with a peak efficiency of 62% occurring at 500 degrees C and 0.001 s(-1). The characteristics of this domain have been studied with the help of microstructural evaluation and hot-ductility measurements. Microstructural instability is predicted at higher strain rates above (ls(-1)) and lower temperatures (less than 350 degrees C).read more
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The Hot Workability of SiCp/2024 Al Composite by Stir Casting
TL;DR: In this paper, the authors explored the hot workability of SiCp/2024 Al composite by conducting hot compression simulation experiments on Gleeble-3500 under temperatures of 300-500 °C and strain rates of 10−3-1−s−1.
Hot deformation and processing maps of CNTs/Al composites fabricated by flake powder metallurgy
TL;DR: In this article, the deformation behavior of as-sintered CNTs/Al-4Cu composite was investigated by isothermal compression tests, which were performed among temperature range of 573-823 K and strain rate range of 0.001-10 s−1 with Gleeble-3500 thermal simulator system, and the height reduction was 60%.
Journal ArticleDOI
Hot deformation and processing maps of Al2O3/Al composites fabricated by flake powder metallurgy
TL;DR: In this article, the deformation behavior of Al 2 O 3 /Al composites was investigated by compressive tests conducted at temperature of 300-450 °C and strain rates of 0.001-1.0 s −1 with Gleeble-1500D thermal simulator system.
Journal ArticleDOI
Development of processing maps for 3 vol.% TiCp/AZ91D composites material
TL;DR: In this paper, the hot deformation behavior of TiCp/AZ91D magnesium matrix composites was investigated by means of hot compression test and processing map at the temperature ranging from 250 to 400°C with the strain rate varying from 0.001 to 10 s −1.
Journal ArticleDOI
Hot Deformation Behaviour of AA2014–10 wt% SiC Composite
Aruna Patel,S. Das,B. K. Prasad +2 more
TL;DR: In this article, the hot compression behavior of AA2014 alloy having 10% SiC particles was studied over a wide range of temperatures (ambient to 400°C) and strain rates (0.01-10/s).
References
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Journal ArticleDOI
Modeling of dynamic material behavior in hot deformation: Forging of Ti-6242
Y. V. R. K. Prasad,Y. V. R. K. Prasad,H. L. Gegel,S. M. Doraivelu,J. C. Malas,J. T. Morgan,K. A. Lark,D. R. Barker +7 more
TL;DR: In this article, a new method of modeling material behavior which accounts for the dynamic metallurgical processes occurring during hot deformation is presented, which considers the workpiece as a dissipator of power in the total processing system and evaluates the dissipated power co-contentJ = ∫o σ e ⋅dσ from the constitutive equation relating the strain rate (e) to the flow stress (σ).
Journal ArticleDOI
Development of a Processing Map for Use in Warm-Forming and Hot-Forming Processes
TL;DR: In this article, a fracture initiation map is developed which should be useful in fast forming operations at strain rates greater than about 10-3 s-1 at elevated temperatures, and two types of cavitation mechanisms, one pertaining to cavity formation at second phase particles, as in ductile fracture, and the other pertaining to wedge type microcracking at grain boundaries, are considered.
Journal ArticleDOI
Superplasticity at high strain rates in a SiC Whisker reinforced A1 alloy
TL;DR: Mise en evidence, dans un alliage commercial d'aluminium renforce par des whiskers de SiC (SiC/2124 Al) soumis a des traitements thermomecaniques adequats, d'un comportement de type superplastique lors d'une deformation isotherme a des taux de deformation relativement elevees as mentioned in this paper.
Journal ArticleDOI
Superplasticity in a silicon carbide whisker reinforced aluminum alloy
Mu Yeh Wu,Oleg D. Sherby +1 more
TL;DR: In this article, a silicon carbide whisker-reinforced aluminum alloy (20% SiC fibers in 2024 aluminum) is shown to exhibit tensile ductilities in the order of 300% when deformed under thermal cycling conditions (100 ⇇ 450° C ) and at low stresses ( σ ⋍ 20 MPa ).
Journal ArticleDOI
Superplasticity in a high strength powder aluminum
Murray W. Mahoney,Amit K. Ghosh +1 more
TL;DR: In this paper, the superplastic properties of a rapidly solidified, high strength P/M Al alloy and the same alloy reinforced with SiC particulates (SiCp) have been studied.