Significance of strain rate in severe plastic deformation on steady-state microstructure and strength

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Significance of strain rate in severe plastic deformation on steady-state microstructure and strength. / Edalati, Kaveh; Wang, Qing; Enikeev, Nariman A.; Peters, Laura Jean; Zehetbauer, Michael J.; Schafler, Erhard.

In: Materials Science and Engineering A, Vol. 859, 144231, 01.11.2022.

Research output: Contribution to journal › Article › peer-review

Author

Edalati, Kaveh ; Wang, Qing ; Enikeev, Nariman A. ; Peters, Laura Jean ; Zehetbauer, Michael J. ; Schafler, Erhard. / Significance of strain rate in severe plastic deformation on steady-state microstructure and strength. In: Materials Science and Engineering A. 2022 ; Vol. 859.

BibTeX

@article{0fbe286e4c764e5c90e909398cdadf6e,

title = "Significance of strain rate in severe plastic deformation on steady-state microstructure and strength",

abstract = "The microstructure and mechanical properties of materials saturate to steady states after severe plastic deformation (SPD). Despite the well-known effect of temperature on the steady-state microstructure, there is no general agreement on the significance of strain rate and the applicability of the Zener-Hollomon parameter in this regard. In this study, several pure metals (aluminum, copper, titanium, and iron) and a Cu–30Zn (wt%) brass alloy have been processed by a high-speed high-pressure torsion (HPT) equipment with controllable rotation speeds in the range of 0.06–60 rpm. It is found that crystallite/grain size, dislocation density, microhardness and shear stress at the steady state are reasonably rate-independent for the von Mises strain rates in the range of 0.004–20 s−1. Because both rates of grain refinement and of dynamic recrystallization are proportional to the strain rate, it is suggested that their balance, which determines the steady state, is rate-independent.",

keywords = "High-pressure torsion (HPT), Nanostructured materials, Strain-rate hardening, Ultrafine-grained (UFG) materials, Zener-Hollomon parameter",

author = "Kaveh Edalati and Qing Wang and Enikeev, {Nariman A.} and Peters, {Laura Jean} and Zehetbauer, {Michael J.} and Erhard Schafler",

note = "Publisher Copyright: {\textcopyright} 2022 Elsevier B.V.",

year = "2022",

month = nov,

day = "1",

doi = "10.1016/j.msea.2022.144231",

language = "English",

volume = "859",

journal = "Materials Science and Engineering: A",

issn = "0921-5093",

publisher = "Elsevier",

}

RIS

TY - JOUR

T1 - Significance of strain rate in severe plastic deformation on steady-state microstructure and strength

AU - Edalati, Kaveh

AU - Wang, Qing

AU - Enikeev, Nariman A.

AU - Peters, Laura Jean

AU - Zehetbauer, Michael J.

AU - Schafler, Erhard

PY - 2022/11/1

Y1 - 2022/11/1

N2 - The microstructure and mechanical properties of materials saturate to steady states after severe plastic deformation (SPD). Despite the well-known effect of temperature on the steady-state microstructure, there is no general agreement on the significance of strain rate and the applicability of the Zener-Hollomon parameter in this regard. In this study, several pure metals (aluminum, copper, titanium, and iron) and a Cu–30Zn (wt%) brass alloy have been processed by a high-speed high-pressure torsion (HPT) equipment with controllable rotation speeds in the range of 0.06–60 rpm. It is found that crystallite/grain size, dislocation density, microhardness and shear stress at the steady state are reasonably rate-independent for the von Mises strain rates in the range of 0.004–20 s−1. Because both rates of grain refinement and of dynamic recrystallization are proportional to the strain rate, it is suggested that their balance, which determines the steady state, is rate-independent.

AB - The microstructure and mechanical properties of materials saturate to steady states after severe plastic deformation (SPD). Despite the well-known effect of temperature on the steady-state microstructure, there is no general agreement on the significance of strain rate and the applicability of the Zener-Hollomon parameter in this regard. In this study, several pure metals (aluminum, copper, titanium, and iron) and a Cu–30Zn (wt%) brass alloy have been processed by a high-speed high-pressure torsion (HPT) equipment with controllable rotation speeds in the range of 0.06–60 rpm. It is found that crystallite/grain size, dislocation density, microhardness and shear stress at the steady state are reasonably rate-independent for the von Mises strain rates in the range of 0.004–20 s−1. Because both rates of grain refinement and of dynamic recrystallization are proportional to the strain rate, it is suggested that their balance, which determines the steady state, is rate-independent.

KW - High-pressure torsion (HPT)

KW - Nanostructured materials

KW - Strain-rate hardening

KW - Ultrafine-grained (UFG) materials

KW - Zener-Hollomon parameter

UR - http://www.scopus.com/inward/record.url?scp=85140922610&partnerID=8YFLogxK

UR - https://www.mendeley.com/catalogue/f710dabb-fbe2-3a09-9183-3fda0ad7d84a/

U2 - 10.1016/j.msea.2022.144231

DO - 10.1016/j.msea.2022.144231

M3 - Article

AN - SCOPUS:85140922610

VL - 859

JO - Materials Science and Engineering: A

JF - Materials Science and Engineering: A

SN - 0921-5093

M1 - 144231

ER -

ID: 99959121