Novel on-line twist extrusion process for bulk magnesium alloys

J. She; P. Peng; A.T. Tang; J.Y. Zhang; J.J. Mao; T.T. Liu; S.B. Zhou; Y. Wang; F.S. Pan

Materials & Design (Nov 2019)

Novel on-line twist extrusion process for bulk magnesium alloys

J. She,
P. Peng,
A.T. Tang,
J.Y. Zhang,
J.J. Mao,
T.T. Liu,
S.B. Zhou,
Y. Wang,
F.S. Pan

Affiliations

J. She: College of Materials Science and Engineering, Chongqing University, Chongqing 400044, China; National Engineering Research Center for Magnesium Alloys, Chongqing University, Chongqing 400044, China; Corresponding authors at: College of Materials Science and Engineering, Chongqing University, Chongqing 400044, China.
P. Peng: College of Materials Science and Engineering, Chongqing University, Chongqing 400044, China
A.T. Tang: College of Materials Science and Engineering, Chongqing University, Chongqing 400044, China; National Engineering Research Center for Magnesium Alloys, Chongqing University, Chongqing 400044, China
J.Y. Zhang: School of Engineering Technology, Purdue University, West Lafayette, IN 47906, USA
J.J. Mao: The First Sub-Institute, Nuclear Power Institute of China, Chengdu 610005, China
T.T. Liu: Faculty of Materials and Energy, Southwest University, Chongqing, China
S.B. Zhou: College of Materials Science and Engineering, Chongqing University, Chongqing 400044, China
Y. Wang: College of Materials Science and Engineering, Chongqing University, Chongqing 400044, China; National Engineering Research Center for Magnesium Alloys, Chongqing University, Chongqing 400044, China
F.S. Pan: College of Materials Science and Engineering, Chongqing University, Chongqing 400044, China; National Engineering Research Center for Magnesium Alloys, Chongqing University, Chongqing 400044, China; Corresponding authors at: College of Materials Science and Engineering, Chongqing University, Chongqing 400044, China.

Journal volume & issue: Vol. 182

Abstract

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This study presented a novel intense plastic straining process called on-line twist extrusion (OLTE). An on-line torsional strain was applied on magnesium extruded rod during extrusion. After OLTE, the grains are refined from the periphery to the center of the bar, and the refined extent can be promoted with increased torsion speed. A fully recrystallized ultrafine grained structures and spiral shaped basal texture with the average grain size of 1.2 μm are successfully achieved with increased torsion speed. The microstructure evolution and strengthening mechanism were also discussed. Keywords: Metals and alloys, Magnesium, Ultrafine grain, Mechanical property

Published in Materials & Design

ISSN: 0264-1275 (Print); 1873-4197 (Online)
Publisher: Elsevier
Country of publisher: United Kingdom
LCC subjects: Technology: Electrical engineering. Electronics. Nuclear engineering: Materials of engineering and construction. Mechanics of materials
Website: https://www.journals.elsevier.com/materials-and-design

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