Exceptional superplasticity in an AZ61 magnesium alloy processed by extrusion and ECAP

Yuichi Miyahara; Zenji Horita; Terence G. Langdon

doi:10.1016/j.msea.2006.01.043

Exceptional superplasticity in an AZ61 magnesium alloy processed by extrusion and ECAP

Yuichi Miyahara, Zenji Horita, Terence G. Langdon

Materials Processing

Research output: Contribution to journal › Article › peer-review

143 Citations (Scopus)

Abstract

Experiments were conducted on a commercial AZ61 alloy to evaluate the potential for achieving an ultrafine grain size and superplastic ductilities through the use of the EX-ECAP two-step processing procedure of extrusion plus equal-channel angular pressing. The results show that EX-ECAP gives excellent grain refinement with grain sizes of ∼0.6 and ∼1.3 μm after pressing at 473 and 523 K, respectively. The alloy processed by EX-ECAP exhibits exceptional superplastic properties including a maximum elongation of 1320% after pressing through four passes when testing at 473 K with an initial strain rate of 3.3 × 10^-4 s^-1. This result compares with an elongation of ∼70% achieved in the extruded condition without ECAP under similar testing conditions.

Original language	English
Pages (from-to)	240-244
Number of pages	5
Journal	Materials Science and Engineering A
Volume	420
Issue number	1-2
DOIs	https://doi.org/10.1016/j.msea.2006.01.043
Publication status	Published - Mar 25 2006

All Science Journal Classification (ASJC) codes

Materials Science(all)
Condensed Matter Physics
Mechanics of Materials
Mechanical Engineering

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abstract = "Experiments were conducted on a commercial AZ61 alloy to evaluate the potential for achieving an ultrafine grain size and superplastic ductilities through the use of the EX-ECAP two-step processing procedure of extrusion plus equal-channel angular pressing. The results show that EX-ECAP gives excellent grain refinement with grain sizes of ∼0.6 and ∼1.3 μm after pressing at 473 and 523 K, respectively. The alloy processed by EX-ECAP exhibits exceptional superplastic properties including a maximum elongation of 1320% after pressing through four passes when testing at 473 K with an initial strain rate of 3.3 × 10-4 s-1. This result compares with an elongation of ∼70% achieved in the extruded condition without ECAP under similar testing conditions.",

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AU - Horita, Zenji

AU - Langdon, Terence G.

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