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Comparative analysis of plastic flow and grain refinement in pure aluminium subjected to simple shear-based severe plastic deformation processing

Orlov, Dmitry; Todaka, Yoshikazu; Umemoto, Minoru; Beygelzimer, Yan and Tsuji, Nobuhiro (2012) In Materials Transactions 53(1). p.17-25
Abstract

In the present work, effects of loading scheme and strain reversal on structure and hardness evolution have been studied by using high pressure torsion (HPT) and twist extrusion (TE) techniques. High purity aluminium (99.99%) was processed at room temperature up to a maximum total equivalent strain of εmax ≈ 8 by TE, and HPT in monotonic and reversal deformation modes with strain increment Δεmax = 1. Minimum subgrain sizes reached in this study were 1.6μm for TE and 1.1μm for HPT. It was revealed that microstructural change with straining was a common consequence of severe plastic deformation (SPD) processing and was not affected significantly by the loading scheme. Among the SPD methods used in this study, HPT in monotonic regime... (More)

In the present work, effects of loading scheme and strain reversal on structure and hardness evolution have been studied by using high pressure torsion (HPT) and twist extrusion (TE) techniques. High purity aluminium (99.99%) was processed at room temperature up to a maximum total equivalent strain of εmax ≈ 8 by TE, and HPT in monotonic and reversal deformation modes with strain increment Δεmax = 1. Minimum subgrain sizes reached in this study were 1.6μm for TE and 1.1μm for HPT. It was revealed that microstructural change with straining was a common consequence of severe plastic deformation (SPD) processing and was not affected significantly by the loading scheme. Among the SPD methods used in this study, HPT in monotonic regime produced the smallest grain size, while the most homogeneous microstructure was obtained by TE due to specific vortex-like flow field imposed by the tool geometry.

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author
publishing date
type
Contribution to journal
publication status
published
subject
keywords
Aluminium, Hardness, High pressure torsion, Microstructure, Twist extrusion
in
Materials Transactions
volume
53
issue
1
pages
9 pages
publisher
Japan Institute of Metals (JIM)
external identifiers
  • scopus:84858314386
ISSN
1345-9678
DOI
10.2320/matertrans.MD201113
language
English
LU publication?
no
id
7ac86c2c-84a1-4243-8a5d-03241cb2a50c
date added to LUP
2016-06-20 15:36:44
date last changed
2017-09-10 05:07:09
@article{7ac86c2c-84a1-4243-8a5d-03241cb2a50c,
  abstract     = {<p>In the present work, effects of loading scheme and strain reversal on structure and hardness evolution have been studied by using high pressure torsion (HPT) and twist extrusion (TE) techniques. High purity aluminium (99.99%) was processed at room temperature up to a maximum total equivalent strain of εmax ≈ 8 by TE, and HPT in monotonic and reversal deformation modes with strain increment Δεmax = 1. Minimum subgrain sizes reached in this study were 1.6μm for TE and 1.1μm for HPT. It was revealed that microstructural change with straining was a common consequence of severe plastic deformation (SPD) processing and was not affected significantly by the loading scheme. Among the SPD methods used in this study, HPT in monotonic regime produced the smallest grain size, while the most homogeneous microstructure was obtained by TE due to specific vortex-like flow field imposed by the tool geometry.</p>},
  author       = {Orlov, Dmitry and Todaka, Yoshikazu and Umemoto, Minoru and Beygelzimer, Yan and Tsuji, Nobuhiro},
  issn         = {1345-9678},
  keyword      = {Aluminium,Hardness,High pressure torsion,Microstructure,Twist extrusion},
  language     = {eng},
  number       = {1},
  pages        = {17--25},
  publisher    = {Japan Institute of Metals (JIM)},
  series       = {Materials Transactions},
  title        = {Comparative analysis of plastic flow and grain refinement in pure aluminium subjected to simple shear-based severe plastic deformation processing},
  url          = {http://dx.doi.org/10.2320/matertrans.MD201113},
  volume       = {53},
  year         = {2012},
}