Microstructure evolution of AZ91D magnesium alloy during extrusion-torsion simultaneous processing

Mitsuaki Furui, Shoyo Sakashita, Kazuya Shimojima, Tetsuo Aida, Kiyoshi Terayama, Yuusuke Ishisaka, Masayuki Yamamoto, Masayuki Ohta

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

4 Scopus citations

Abstract

Extrusion-torsion simultaneous processing is a very new and useful technique for fabricating a rod-shape material with random and fine structures. The obtained sample was especially strengthened and grain-refined on the surface. By the addition of torsion from 10 rpm to 25 rpm, the crystal orientation of AZ91D magnesium alloy was drastically changed from basal crystalline orientation to random orientation. Crystal grain which occurred through the dynamic recrystallization tended to coarsen with the increase of extrusion-torsion temperature. Grain refinement under 2 μm was achieved at the lowest extrusion-torsion temperature of 523 K. Torsion speed had a slight influence on the microstructure evolution and hardness distribution compared with extrusion-torsion temperature.

Original languageEnglish
Title of host publication8th Pacific Rim International Congress on Advanced Materials and Processing 2013, PRICM 8
PublisherJohn Wiley and Sons Inc.
Pages1323-1328
Number of pages6
ISBN (Print)9781632660008
DOIs
StatePublished - 2013
Event8th Pacific Rim International Congress on Advanced Materials and Processing 2013, PRICM 8 - Waikoloa, HI, United States
Duration: 2013/08/042013/08/09

Publication series

Name8th Pacific Rim International Congress on Advanced Materials and Processing 2013, PRICM 8
Volume2

Conference

Conference8th Pacific Rim International Congress on Advanced Materials and Processing 2013, PRICM 8
Country/TerritoryUnited States
CityWaikoloa, HI
Period2013/08/042013/08/09

Keywords

  • Extrusion-torsion simultaneous processing
  • Grain refinement
  • Microstructure evolution
  • Random texture

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials

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