Grain Refinement in a Commercial Al-Mg-Sc-Zr Alloy during Hot ECAP

Olga Sukhopar; Oleg Sitdikov; Günter Gottstein; Rustam Kaibyshev

doi:10.4028/www.scientific.net/MSF.584-586.722

Paper Titles

Investigations on Deformation Behavior and Microstructure of Ultrafine Grained Two Phase Al-Mn Alloy Fabricated by Confined Channel Die Pressing
p.697

Deformation Behaviour of an Ultra-Fine Grained Al6082 Alloy
p.703

Precipitation Studies of Undeformed and ECAP-Deformed Al-4%Cu Alloys: Effects on Microstructure and Tensile Properties
p.708

Grain Boundary Structures of ARB Processed Aluminum
p.716

Grain Refinement in a Commercial Al-Mg-Sc-Zr Alloy during Hot ECAP
p.722

Microstructure and Aging Behavior of Al-0.2wt%Zr Alloy Heavily Deformed by ARB Process
p.728

A Comparative Study on Mechanical Properties of Al 7075 Alloy Processed by Rolling at Cryogenic Temperature and Room Temperature
p.734

Strain Rate Sensitivity of Ultrafine Grained Aluminium Alloy AA6061
p.741

Development of Extrusion and Rolling Textures during ECAP of Mg-Alloys
p.748

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Grain Refinement in a Commercial Al-Mg-Sc-Zr Alloy during Hot ECAP

Abstract:

The microstructure evolution of an as-cast commercial Al-Mg-Sc-Zr alloy during Equal- Channel Angular Pressing (ECAP) at 325°C was investigated. In the early stages of deformation strain induced boundaries were created within the initial coarse grains and constitute the deformation bands. Repeated ECAP led to an increase of the number and misorientation of deformation bands. Further straining up to e~8 resulted in the formation of a new fine-grained structure with an average crystallite size of 1.2 /m. It is concluded that the progressive increase of the misorientation of deformation induced boundaries is the main mechanism of structure formation under high temperature ECAP.