Mapping subgrain sizes resulting from severe simple shear deformation

S. Abolghasem, Saurabh Basu, S. Shekhar, J. Cai, M. R. Shankar

Research output: Contribution to journalArticle

30 Citations (Scopus)

Abstract

Grain refinement under interactive effects of severe shear strains, strain rates and temperatures often follows complex trajectories. Encapsulating the process-structure linkages under these conditions is central to controlling product outcomes from processes involving severe plastic deformation. This paper uses in situ characterization of deformation in large-strain machining using high-speed digital image correlation and IR thermography to examine the microstructural consequences across a swathe of directly quantified thermomechanical conditions. Using electron microscopy, it is shown that the average subgrain sizes resulting from this deformation correlate with the strain and the theoretical limit of the subgrain-size that is achievable. From this, a suitably parameterized map-space is proposed for capturing average subgrain sizes resulting from severe shear deformation. The parameterization is characterized by the y axis as the strain and the x axis as a parameter R, which is a function of the strain-rate, temperature and material constants. Noting that the surfaces from machining processes are essentially derived from severe thermomechanical conditions akin to those explored here, the implications of subgrain size-maps for controlling surface microstructures on components manufactured by machining processes are discussed.

Original languageEnglish (US)
Pages (from-to)376-386
Number of pages11
JournalActa Materialia
Volume60
Issue number1
DOIs
StatePublished - Jan 1 2012

Fingerprint

Shear deformation
Machining
Strain rate
Grain refinement
Shear strain
Parameterization
Electron microscopy
Plastic deformation
Trajectories
Temperature
Microstructure

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Ceramics and Composites
  • Polymers and Plastics
  • Metals and Alloys

Cite this

Abolghasem, S. ; Basu, Saurabh ; Shekhar, S. ; Cai, J. ; Shankar, M. R. / Mapping subgrain sizes resulting from severe simple shear deformation. In: Acta Materialia. 2012 ; Vol. 60, No. 1. pp. 376-386.
@article{a651aff10c9a48f6876108e71003d82f,
title = "Mapping subgrain sizes resulting from severe simple shear deformation",
abstract = "Grain refinement under interactive effects of severe shear strains, strain rates and temperatures often follows complex trajectories. Encapsulating the process-structure linkages under these conditions is central to controlling product outcomes from processes involving severe plastic deformation. This paper uses in situ characterization of deformation in large-strain machining using high-speed digital image correlation and IR thermography to examine the microstructural consequences across a swathe of directly quantified thermomechanical conditions. Using electron microscopy, it is shown that the average subgrain sizes resulting from this deformation correlate with the strain and the theoretical limit of the subgrain-size that is achievable. From this, a suitably parameterized map-space is proposed for capturing average subgrain sizes resulting from severe shear deformation. The parameterization is characterized by the y axis as the strain and the x axis as a parameter R, which is a function of the strain-rate, temperature and material constants. Noting that the surfaces from machining processes are essentially derived from severe thermomechanical conditions akin to those explored here, the implications of subgrain size-maps for controlling surface microstructures on components manufactured by machining processes are discussed.",
author = "S. Abolghasem and Saurabh Basu and S. Shekhar and J. Cai and Shankar, {M. R.}",
year = "2012",
month = "1",
day = "1",
doi = "10.1016/j.actamat.2011.09.055",
language = "English (US)",
volume = "60",
pages = "376--386",
journal = "Acta Materialia",
issn = "1359-6454",
publisher = "Elsevier Limited",
number = "1",

}

Mapping subgrain sizes resulting from severe simple shear deformation. / Abolghasem, S.; Basu, Saurabh; Shekhar, S.; Cai, J.; Shankar, M. R.

In: Acta Materialia, Vol. 60, No. 1, 01.01.2012, p. 376-386.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Mapping subgrain sizes resulting from severe simple shear deformation

AU - Abolghasem, S.

AU - Basu, Saurabh

AU - Shekhar, S.

AU - Cai, J.

AU - Shankar, M. R.

PY - 2012/1/1

Y1 - 2012/1/1

N2 - Grain refinement under interactive effects of severe shear strains, strain rates and temperatures often follows complex trajectories. Encapsulating the process-structure linkages under these conditions is central to controlling product outcomes from processes involving severe plastic deformation. This paper uses in situ characterization of deformation in large-strain machining using high-speed digital image correlation and IR thermography to examine the microstructural consequences across a swathe of directly quantified thermomechanical conditions. Using electron microscopy, it is shown that the average subgrain sizes resulting from this deformation correlate with the strain and the theoretical limit of the subgrain-size that is achievable. From this, a suitably parameterized map-space is proposed for capturing average subgrain sizes resulting from severe shear deformation. The parameterization is characterized by the y axis as the strain and the x axis as a parameter R, which is a function of the strain-rate, temperature and material constants. Noting that the surfaces from machining processes are essentially derived from severe thermomechanical conditions akin to those explored here, the implications of subgrain size-maps for controlling surface microstructures on components manufactured by machining processes are discussed.

AB - Grain refinement under interactive effects of severe shear strains, strain rates and temperatures often follows complex trajectories. Encapsulating the process-structure linkages under these conditions is central to controlling product outcomes from processes involving severe plastic deformation. This paper uses in situ characterization of deformation in large-strain machining using high-speed digital image correlation and IR thermography to examine the microstructural consequences across a swathe of directly quantified thermomechanical conditions. Using electron microscopy, it is shown that the average subgrain sizes resulting from this deformation correlate with the strain and the theoretical limit of the subgrain-size that is achievable. From this, a suitably parameterized map-space is proposed for capturing average subgrain sizes resulting from severe shear deformation. The parameterization is characterized by the y axis as the strain and the x axis as a parameter R, which is a function of the strain-rate, temperature and material constants. Noting that the surfaces from machining processes are essentially derived from severe thermomechanical conditions akin to those explored here, the implications of subgrain size-maps for controlling surface microstructures on components manufactured by machining processes are discussed.

UR - http://www.scopus.com/inward/record.url?scp=80155193185&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=80155193185&partnerID=8YFLogxK

U2 - 10.1016/j.actamat.2011.09.055

DO - 10.1016/j.actamat.2011.09.055

M3 - Article

AN - SCOPUS:80155193185

VL - 60

SP - 376

EP - 386

JO - Acta Materialia

JF - Acta Materialia

SN - 1359-6454

IS - 1

ER -