Investigation of material flow behaviour and microstructure during differential velocity sideway extrusion
File(s)
OA Location
Author(s)
Lu, Xiaochen
Yu, junquan
Lin, jianguo
Shi, Zhusheng
Type
Conference Paper
Abstract
Differential velocity sideway extrusion (DVSE) process is a cutting-edge technology to manufacture curved profiles with solid or hollow cross-sections. Extrusion welding is inevitable to form hollow cross-section profiles during DVSE. In the present work, two billets (AA1070) were welded into a bar in the chamber of an extrusion die through DVSE. The material flow behaviour, grain structure and its development in the extruded bar were studied. Based on material flow behaviour, the flow plane of material in the chamber of extrusion die can be divided into metal dead zone (MDZ), shearing intensive zone (SIZ), and metal flow zone (MFZ, including the welding zone). A sound weld without any bonding interface can be obtained by DVSE welding at 500 ℃ and 0.1 mm/s. Before material arrives at the exit of extrusion die, banded structures form along the metal flow direction with the increase of deformation and the mean grain size continually decreases due to dynamic recrystallisation (DRX). Grains significantly grow after exiting from the extrusion die.
Date Issued
2020-09-04
Date Acceptance
2020-07-12
Citation
Procedia Manufacturing, 2020, 50, pp.226-230
ISSN
2351-9789
Publisher
Elsevier
Start Page
226
End Page
230
Journal / Book Title
Procedia Manufacturing
Volume
50
Copyright Statement
© 2020 The Author(s). Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/)
Sponsor
Beijing Institute of Aeronautical Materials (BIAM)
Grant Number
N/A
Source
18th International Conference on Metal Forming 2020 (Virtual)
Subjects
0910 Manufacturing Engineering
1007 Nanotechnology
Publication Status
Published
Start Date
2020-09-13
Finish Date
2020-09-16
Coverage Spatial
Kraków, Poland
Date Publish Online
2020-09-04