A Cyclic Forward-Backward Extrusion Process as a Novel Severe Plastic Deformation for Production of Ultrafine Grains Materials

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 47 µm to about 1 µm. Also a substantial increase in the hardness, from 25 Hv to 47-52 Hv, was recorded by microhardness tests after one cycle of CFBE.

Department(s)

Materials Science and Engineering

Research Center/Lab(s)

Peaslee Steel Manufacturing Research Center

Keywords and Phrases

Bulk alloys; Extrusion process; Geometrical changes; Microhardness tests; Severe plastic deformations; Ultra fine grain; Ultra-high; Ultrafine grains materials, Aluminum; Extrusion; Grain refinement; Microhardness; Plastic deformation; Transmission electron microscopy, Aluminum alloys; Cyclic extrusion; TEM; Ultrafine grain

International Standard Serial Number (ISSN)

0167-577X

Document Type

Article - Journal

Document Version

Citation

File Type

text

Language(s)

English

Rights

© 2012 Elsevier, All rights reserved.

Publication Date

01 Feb 2012

Link to Full Text

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