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Long-time stability of metals after severe plastic deformation : Softening and hardening by self-annealing versus thermal stability. / Edalati, Kaveh; Hashiguchi, Yuki; Iwaoka, Hideaki; Matsunaga, Hirotaka; Valiev, Ruslan Z.; Horita, Zenji.

в: Materials Science and Engineering A, Том 729, 27.06.2018, стр. 340-348.

Результаты исследований: Научные публикации в периодических изданияхстатьяРецензирование

Harvard

Edalati, K, Hashiguchi, Y, Iwaoka, H, Matsunaga, H, Valiev, RZ & Horita, Z 2018, 'Long-time stability of metals after severe plastic deformation: Softening and hardening by self-annealing versus thermal stability', Materials Science and Engineering A, Том. 729, стр. 340-348. https://doi.org/10.1016/j.msea.2018.05.079

APA

Edalati, K., Hashiguchi, Y., Iwaoka, H., Matsunaga, H., Valiev, R. Z., & Horita, Z. (2018). Long-time stability of metals after severe plastic deformation: Softening and hardening by self-annealing versus thermal stability. Materials Science and Engineering A, 729, 340-348. https://doi.org/10.1016/j.msea.2018.05.079

Vancouver

Edalati K, Hashiguchi Y, Iwaoka H, Matsunaga H, Valiev RZ, Horita Z. Long-time stability of metals after severe plastic deformation: Softening and hardening by self-annealing versus thermal stability. Materials Science and Engineering A. 2018 Июнь 27;729:340-348. https://doi.org/10.1016/j.msea.2018.05.079

Author

Edalati, Kaveh ; Hashiguchi, Yuki ; Iwaoka, Hideaki ; Matsunaga, Hirotaka ; Valiev, Ruslan Z. ; Horita, Zenji. / Long-time stability of metals after severe plastic deformation : Softening and hardening by self-annealing versus thermal stability. в: Materials Science and Engineering A. 2018 ; Том 729. стр. 340-348.

BibTeX

@article{62226a36fad84a388ca60b1cf4e6b4db,
title = "Long-time stability of metals after severe plastic deformation: Softening and hardening by self-annealing versus thermal stability",
abstract = "Despite superior properties of ultrafine-grained (UFG) materials processed by severe plastic deformation (SPD), their thermal stability is a concern because of the supersaturated fractions of lattice defects. In this study, the microstructural stability of various UFG materials (2 alloys and 15 pure metals) after SPD processing through the high-pressure torsion (HPT) were investigated at room temperature for up to 10 years. While most of the metals with high melting temperatures remained stable, a softening by self-annealing occurred in pure silver, gold and copper (with moderate melting temperatures), and an unusual hardening occurred in pure magnesium, Al-Zn alloy and Mg-Li alloy (with low melting temperatures). These softening/hardening behaviors by grain coarsening were attributed to the contribution of grain boundaries to dislocation activity or grain-boundary sliding, respectively. It was shown that the self-annealing was accelerated by increasing the processing pressure and strain and by decreasing the processing temperature and stacking fault energy, due to the enhancement of stored energy and/or atomic mobility.",
keywords = "Aluminum-zinc alloys, High-pressure torsion (HPT), Magnesium-lithium alloys, Severe plastic deformation (SPD), stacking fault energy, Ultrafine-grained (UFG) metals",
author = "Kaveh Edalati and Yuki Hashiguchi and Hideaki Iwaoka and Hirotaka Matsunaga and Valiev, {Ruslan Z.} and Zenji Horita",
year = "2018",
month = jun,
day = "27",
doi = "10.1016/j.msea.2018.05.079",
language = "English",
volume = "729",
pages = "340--348",
journal = "Materials Science and Engineering: A",
issn = "0921-5093",
publisher = "Elsevier",

}

RIS

TY - JOUR

T1 - Long-time stability of metals after severe plastic deformation

T2 - Softening and hardening by self-annealing versus thermal stability

AU - Edalati, Kaveh

AU - Hashiguchi, Yuki

AU - Iwaoka, Hideaki

AU - Matsunaga, Hirotaka

AU - Valiev, Ruslan Z.

AU - Horita, Zenji

PY - 2018/6/27

Y1 - 2018/6/27

N2 - Despite superior properties of ultrafine-grained (UFG) materials processed by severe plastic deformation (SPD), their thermal stability is a concern because of the supersaturated fractions of lattice defects. In this study, the microstructural stability of various UFG materials (2 alloys and 15 pure metals) after SPD processing through the high-pressure torsion (HPT) were investigated at room temperature for up to 10 years. While most of the metals with high melting temperatures remained stable, a softening by self-annealing occurred in pure silver, gold and copper (with moderate melting temperatures), and an unusual hardening occurred in pure magnesium, Al-Zn alloy and Mg-Li alloy (with low melting temperatures). These softening/hardening behaviors by grain coarsening were attributed to the contribution of grain boundaries to dislocation activity or grain-boundary sliding, respectively. It was shown that the self-annealing was accelerated by increasing the processing pressure and strain and by decreasing the processing temperature and stacking fault energy, due to the enhancement of stored energy and/or atomic mobility.

AB - Despite superior properties of ultrafine-grained (UFG) materials processed by severe plastic deformation (SPD), their thermal stability is a concern because of the supersaturated fractions of lattice defects. In this study, the microstructural stability of various UFG materials (2 alloys and 15 pure metals) after SPD processing through the high-pressure torsion (HPT) were investigated at room temperature for up to 10 years. While most of the metals with high melting temperatures remained stable, a softening by self-annealing occurred in pure silver, gold and copper (with moderate melting temperatures), and an unusual hardening occurred in pure magnesium, Al-Zn alloy and Mg-Li alloy (with low melting temperatures). These softening/hardening behaviors by grain coarsening were attributed to the contribution of grain boundaries to dislocation activity or grain-boundary sliding, respectively. It was shown that the self-annealing was accelerated by increasing the processing pressure and strain and by decreasing the processing temperature and stacking fault energy, due to the enhancement of stored energy and/or atomic mobility.

KW - Aluminum-zinc alloys

KW - High-pressure torsion (HPT)

KW - Magnesium-lithium alloys

KW - Severe plastic deformation (SPD)

KW - stacking fault energy

KW - Ultrafine-grained (UFG) metals

UR - http://www.scopus.com/inward/record.url?scp=85047600867&partnerID=8YFLogxK

U2 - 10.1016/j.msea.2018.05.079

DO - 10.1016/j.msea.2018.05.079

M3 - Article

AN - SCOPUS:85047600867

VL - 729

SP - 340

EP - 348

JO - Materials Science and Engineering: A

JF - Materials Science and Engineering: A

SN - 0921-5093

ER -

ID: 35153802