A cyclic forward–backward extrusion process as a novel severe plastic deformation for production of ultrafine grains materials

H Alihosseini,M Asle Zaeem,K Dehghani

doi:10.1016/j.matlet.2011.10.037

A cyclic forward–backward extrusion process as a novel severe plastic deformation for production of ultrafine grains materials

H Alihosseini, M Asle Zaeem + Show 1 more

https://doi.org/10.1016/j.matlet.2011.10.037

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Journal: Materials letters	Publication Date: Oct 15, 2011
Citations: 36

Affiliation: Amirkabir University of Technology, Mississippi State University

#Ultrafine Grains #Severe Plastic Deformation + Show 8 more

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Abstract

A new severe plastic deformation (SPD) process based on a cyclic forward–backward extrusion (CFBE) is introduced for producing ultrafine grains in bulk alloys. CFBE was applied to AA1050 aluminum alloy and produced ultra-high plastic strains without any geometrical change. After only one cycle of CFBE, transmission electron microscopy (TEM) showed a significant grain refinement from 47μm to about 1μm. Also a substantial increase in the hardness, from 25 Hv to 47–52Hv, was recorded by microhardness tests after one cycle of CFBE.

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