Developing superplasticity in a magnesium alloy through a combination of extrusion and ECAP

K. Matsubara, Y. Miyahara, Z. Horita, T. G. Langdon

Research output: Contribution to journalArticle

323 Citations (Scopus)

Abstract

A new processing procedure was applied to a cast Mg-9% Al alloy. This procedure involves the sequential application of extrusion and equal-channel angular pressing and is designated EX-ECAP. Experiments show that the Mg-9% Al alloy has an initial grain size of ∼50 μm after casting but this is reduced to ∼12 μm after extrusion and it is further reduced to ∼0.7 μm when the extruded alloy is subjected to ECAP for 2 passes at 473 K. Although the cast alloy exhibits extremely limited ductility and the extruded alloy is only moderately ductile, it is demonstrated that processing by EX-ECAP produces excellent superplastic ductilities including the occurrence of both low temperature superplasticity and high strain rate superplasticity. The EX-ECAP process is less effective when the ECAP step is conducted at 573 K because, although the pressing is then very easy, there is significant grain growth at this higher temperature.

Original languageEnglish
Pages (from-to)3073-3084
Number of pages12
JournalActa Materialia
Volume51
Issue number11
DOIs
Publication statusPublished - Jun 27 2003

Fingerprint

Superplasticity
Magnesium alloys
Extrusion
Ductility
Equal channel angular pressing
Processing
Grain growth
Strain rate
Casting
Temperature
Experiments

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Ceramics and Composites
  • Polymers and Plastics
  • Metals and Alloys

Cite this

Developing superplasticity in a magnesium alloy through a combination of extrusion and ECAP. / Matsubara, K.; Miyahara, Y.; Horita, Z.; Langdon, T. G.

In: Acta Materialia, Vol. 51, No. 11, 27.06.2003, p. 3073-3084.

Research output: Contribution to journalArticle

Matsubara, K. ; Miyahara, Y. ; Horita, Z. ; Langdon, T. G. / Developing superplasticity in a magnesium alloy through a combination of extrusion and ECAP. In: Acta Materialia. 2003 ; Vol. 51, No. 11. pp. 3073-3084.
@article{283ac2d24b384055a35f7d9e5de6c479,
title = "Developing superplasticity in a magnesium alloy through a combination of extrusion and ECAP",
abstract = "A new processing procedure was applied to a cast Mg-9{\%} Al alloy. This procedure involves the sequential application of extrusion and equal-channel angular pressing and is designated EX-ECAP. Experiments show that the Mg-9{\%} Al alloy has an initial grain size of ∼50 μm after casting but this is reduced to ∼12 μm after extrusion and it is further reduced to ∼0.7 μm when the extruded alloy is subjected to ECAP for 2 passes at 473 K. Although the cast alloy exhibits extremely limited ductility and the extruded alloy is only moderately ductile, it is demonstrated that processing by EX-ECAP produces excellent superplastic ductilities including the occurrence of both low temperature superplasticity and high strain rate superplasticity. The EX-ECAP process is less effective when the ECAP step is conducted at 573 K because, although the pressing is then very easy, there is significant grain growth at this higher temperature.",
author = "K. Matsubara and Y. Miyahara and Z. Horita and Langdon, {T. G.}",
year = "2003",
month = "6",
day = "27",
doi = "10.1016/S1359-6454(03)00118-6",
language = "English",
volume = "51",
pages = "3073--3084",
journal = "Acta Materialia",
issn = "1359-6454",
publisher = "Elsevier Limited",
number = "11",

}

TY - JOUR

T1 - Developing superplasticity in a magnesium alloy through a combination of extrusion and ECAP

AU - Matsubara, K.

AU - Miyahara, Y.

AU - Horita, Z.

AU - Langdon, T. G.

PY - 2003/6/27

Y1 - 2003/6/27

N2 - A new processing procedure was applied to a cast Mg-9% Al alloy. This procedure involves the sequential application of extrusion and equal-channel angular pressing and is designated EX-ECAP. Experiments show that the Mg-9% Al alloy has an initial grain size of ∼50 μm after casting but this is reduced to ∼12 μm after extrusion and it is further reduced to ∼0.7 μm when the extruded alloy is subjected to ECAP for 2 passes at 473 K. Although the cast alloy exhibits extremely limited ductility and the extruded alloy is only moderately ductile, it is demonstrated that processing by EX-ECAP produces excellent superplastic ductilities including the occurrence of both low temperature superplasticity and high strain rate superplasticity. The EX-ECAP process is less effective when the ECAP step is conducted at 573 K because, although the pressing is then very easy, there is significant grain growth at this higher temperature.

AB - A new processing procedure was applied to a cast Mg-9% Al alloy. This procedure involves the sequential application of extrusion and equal-channel angular pressing and is designated EX-ECAP. Experiments show that the Mg-9% Al alloy has an initial grain size of ∼50 μm after casting but this is reduced to ∼12 μm after extrusion and it is further reduced to ∼0.7 μm when the extruded alloy is subjected to ECAP for 2 passes at 473 K. Although the cast alloy exhibits extremely limited ductility and the extruded alloy is only moderately ductile, it is demonstrated that processing by EX-ECAP produces excellent superplastic ductilities including the occurrence of both low temperature superplasticity and high strain rate superplasticity. The EX-ECAP process is less effective when the ECAP step is conducted at 573 K because, although the pressing is then very easy, there is significant grain growth at this higher temperature.

UR - http://www.scopus.com/inward/record.url?scp=0037505626&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0037505626&partnerID=8YFLogxK

U2 - 10.1016/S1359-6454(03)00118-6

DO - 10.1016/S1359-6454(03)00118-6

M3 - Article

AN - SCOPUS:0037505626

VL - 51

SP - 3073

EP - 3084

JO - Acta Materialia

JF - Acta Materialia

SN - 1359-6454

IS - 11

ER -