Modelling microstructure evolution toward ultrafine crystallinity produced by severe plastic deformation
نویسندگان
چکیده
منابع مشابه
MICROSTRUCTURE AND MECHANICAL PROPERTIES OF THE ULTRAFINE-GRAINED COPPER TUBE PRODUCED BY SEVERE PLASTIC DEFORMATION
In this paper, cyclic flaring and sinking (CFS) as a new severe plastic deformation (SPD) method was employed to produce the ultrafine grain (UFG) copper tubes. The extra friction has eliminated in the CFS method that provided the possibility for production of longer UFG tubes compared to the other SPD methods. This process was done periodically to apply more strain and consequently finer grain...
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In the present work, nano/ultrafine structured Al/Brass composite was produced by accumulative roll bonding (ARB) up to eight cycles. The evolution of grain refinement and deformation texture and their effect on the mechanical properties were investigated. It was observed that by increasing the ARB cycles, due to the difference in flow properties of the metal constituents, brass layers necked, ...
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In this paper, several versions of extrusion processes were used to provide severe plastic deformation for grain refinement (with a modified ECAE extrusion) and for grain/fiber alignment (with straight extrusion). The process was performed at elevated temperatures to reduce extrusion pressure, and in order to increase strength and avoid grain growth secondary phases were added or insitu formed....
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The microstructures of copper chips created by plane strain machining at ambient temperature have been analyzed using transmission electron microscopy (TEM) and orientation imaging microscopy (OIM). The strain imposed in the chips was varied by changing the tool rake angle. Characterization of orthogonal faces of the chips showed the microstructure to be essentially uniform through the chip vol...
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High-pressure torsion (HPT) is a metal processing method in which the sample is subjected to a very high plastic shear deformation. This process can produce exceptional levels of grain refinement, and provides a corresponding improvement in mechanical properties. To investigate the stress and strain distribution due to HPT process finite element simulation were conducted to investigate effectiv...
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ژورنال
عنوان ژورنال: Journal of Materials Science
سال: 2007
ISSN: 0022-2461,1573-4803
DOI: 10.1007/s10853-007-2269-3