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

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

163 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

General Materials Science
Condensed Matter Physics
Mechanics of Materials
Mechanical Engineering

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10.1016/j.msea.2006.01.043

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@article{39406cbc7b0f4f06ad72d8da6b0fe835,

title = "Exceptional superplasticity in an AZ61 magnesium alloy processed by extrusion and ECAP",

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 {\texttimes} 10-4 s-1. This result compares with an elongation of ∼70\% achieved in the extruded condition without ECAP under similar testing conditions.",

author = "Yuichi Miyahara and Zenji Horita and Langdon, \{Terence G.\}",

note = "Funding Information: We are grateful to Dr. Bodo Gerold of BIOTRONIK GmbH \& Co., Erlangen, Germany, for supplying the extruded AZ61 alloy. This work was supported in part by a Grant-in-Aid for Scientific Research from the Ministry of Education, Culture, Sports, Science and Technology of Japan, in part by the Light Metals Educational Foundation of Japan and in part by the National Science Foundation of the United States under Grant No. DMR-0243331.",

year = "2006",

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doi = "10.1016/j.msea.2006.01.043",

language = "English",

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journal = "Materials Science and Engineering: A",

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T1 - Exceptional superplasticity in an AZ61 magnesium alloy processed by extrusion and ECAP

AU - Miyahara, Yuichi

AU - Horita, Zenji

AU - Langdon, Terence G.

N1 - Funding Information: We are grateful to Dr. Bodo Gerold of BIOTRONIK GmbH & Co., Erlangen, Germany, for supplying the extruded AZ61 alloy. This work was supported in part by a Grant-in-Aid for Scientific Research from the Ministry of Education, Culture, Sports, Science and Technology of Japan, in part by the Light Metals Educational Foundation of Japan and in part by the National Science Foundation of the United States under Grant No. DMR-0243331.

PY - 2006/3/25

Y1 - 2006/3/25

N2 - 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.

AB - 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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DO - 10.1016/j.msea.2006.01.043

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AN - SCOPUS:33645542005

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JO - Materials Science and Engineering: A

JF - Materials Science and Engineering: A

IS - 1-2

ER -

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

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