Developing grain refinement and superplasticity in a magnesium alloy processed by high-pressure torsion

Masaaki Kai, Zenji Horita, Terence G. Langdon

Research output: Contribution to journalArticle

154 Citations (Scopus)

Abstract

Experiments were conducted on a Mg-9% Al alloy to evaluate the microstructural characteristics and the tensile properties at elevated temperatures after processing by high-pressure torsion (HPT) at room temperature and at 423 K. Ultrafine grain sizes were achieved by processing samples in both an extruded and a cast condition. The results demonstrate the viability of using HPT as a processing technique for achieving significant grain refinement in magnesium alloys which are not processed easily by equal-channel angular pressing (ECAP). Superplastic ductilities were achieved in tensile testing at a temperature of 473 K with a maximum measured elongation of 810%. In general, higher superplastic elongations were achieved after processing by HPT at 423 K because of the development of some limited internal cracking when processing at room temperature.

Original languageEnglish
Pages (from-to)117-124
Number of pages8
JournalMaterials Science and Engineering A
Volume488
Issue number1-2
DOIs
Publication statusPublished - Aug 15 2008

Fingerprint

superplasticity
Superplasticity
Grain refinement
magnesium alloys
Magnesium alloys
Torsional stress
torsion
Processing
elongation
Elongation
Equal channel angular pressing
Temperature
tensile properties
Tensile testing
room temperature
pressing
ductility
Tensile properties
viability
Ductility

All Science Journal Classification (ASJC) codes

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

Cite this

Developing grain refinement and superplasticity in a magnesium alloy processed by high-pressure torsion. / Kai, Masaaki; Horita, Zenji; Langdon, Terence G.

In: Materials Science and Engineering A, Vol. 488, No. 1-2, 15.08.2008, p. 117-124.

Research output: Contribution to journalArticle

Kai, Masaaki ; Horita, Zenji ; Langdon, Terence G. / Developing grain refinement and superplasticity in a magnesium alloy processed by high-pressure torsion. In: Materials Science and Engineering A. 2008 ; Vol. 488, No. 1-2. pp. 117-124.
@article{8f694dd2f2c148acb582b8d90de7acb1,
title = "Developing grain refinement and superplasticity in a magnesium alloy processed by high-pressure torsion",
abstract = "Experiments were conducted on a Mg-9{\%} Al alloy to evaluate the microstructural characteristics and the tensile properties at elevated temperatures after processing by high-pressure torsion (HPT) at room temperature and at 423 K. Ultrafine grain sizes were achieved by processing samples in both an extruded and a cast condition. The results demonstrate the viability of using HPT as a processing technique for achieving significant grain refinement in magnesium alloys which are not processed easily by equal-channel angular pressing (ECAP). Superplastic ductilities were achieved in tensile testing at a temperature of 473 K with a maximum measured elongation of 810{\%}. In general, higher superplastic elongations were achieved after processing by HPT at 423 K because of the development of some limited internal cracking when processing at room temperature.",
author = "Masaaki Kai and Zenji Horita and Langdon, {Terence G.}",
year = "2008",
month = "8",
day = "15",
doi = "10.1016/j.msea.2007.12.046",
language = "English",
volume = "488",
pages = "117--124",
journal = "Materials Science & Engineering A: Structural Materials: Properties, Microstructure and Processing",
issn = "0921-5093",
publisher = "Elsevier BV",
number = "1-2",

}

TY - JOUR

T1 - Developing grain refinement and superplasticity in a magnesium alloy processed by high-pressure torsion

AU - Kai, Masaaki

AU - Horita, Zenji

AU - Langdon, Terence G.

PY - 2008/8/15

Y1 - 2008/8/15

N2 - Experiments were conducted on a Mg-9% Al alloy to evaluate the microstructural characteristics and the tensile properties at elevated temperatures after processing by high-pressure torsion (HPT) at room temperature and at 423 K. Ultrafine grain sizes were achieved by processing samples in both an extruded and a cast condition. The results demonstrate the viability of using HPT as a processing technique for achieving significant grain refinement in magnesium alloys which are not processed easily by equal-channel angular pressing (ECAP). Superplastic ductilities were achieved in tensile testing at a temperature of 473 K with a maximum measured elongation of 810%. In general, higher superplastic elongations were achieved after processing by HPT at 423 K because of the development of some limited internal cracking when processing at room temperature.

AB - Experiments were conducted on a Mg-9% Al alloy to evaluate the microstructural characteristics and the tensile properties at elevated temperatures after processing by high-pressure torsion (HPT) at room temperature and at 423 K. Ultrafine grain sizes were achieved by processing samples in both an extruded and a cast condition. The results demonstrate the viability of using HPT as a processing technique for achieving significant grain refinement in magnesium alloys which are not processed easily by equal-channel angular pressing (ECAP). Superplastic ductilities were achieved in tensile testing at a temperature of 473 K with a maximum measured elongation of 810%. In general, higher superplastic elongations were achieved after processing by HPT at 423 K because of the development of some limited internal cracking when processing at room temperature.

UR - http://www.scopus.com/inward/record.url?scp=44149095808&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=44149095808&partnerID=8YFLogxK

U2 - 10.1016/j.msea.2007.12.046

DO - 10.1016/j.msea.2007.12.046

M3 - Article

AN - SCOPUS:44149095808

VL - 488

SP - 117

EP - 124

JO - Materials Science & Engineering A: Structural Materials: Properties, Microstructure and Processing

JF - Materials Science & Engineering A: Structural Materials: Properties, Microstructure and Processing

SN - 0921-5093

IS - 1-2

ER -