Superior strength in ultrafine-grained materials produced by SPD processing.

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33 Citations (Scopus)

Abstract

Recent studies demonstrated that the processing of metallic alloys by severe plastic deformation (SPD) can result in not only strong grain refinement but also leads to the formation of grain boundaries (GBs) with different structures, including GB segregations and precipitations. These nanostructural features of SPD-processed alloys produce considerable influence on their mechanical properties. The paper presents experimental data demonstrating a superstrength and positive slope of the HallPetch relation when passing from micro- to nanostructured state in a number of metallic materials subjected to severe plastic deformation. The nature of the superior strength is associated with new strengthening mechanisms and the difficulty of generation of dislocations from grain boundaries with segregations. This new approach is used for achieving the enhanced strength in several commercial Al and Ti alloys as well as steels subjected to SPD processing. © 2013 The Japan Institute of Metals and Materials.
Original languageEnglish
Pages (from-to)13-18
JournalMaterials Transactions
Volume55
Issue number1
DOIs
Publication statusPublished - 2014

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plastic deformation
Plastic deformation
Grain boundaries
grain boundaries
Processing
Grain refinement
Alloy steel
Dislocations (crystals)
Japan
Metals
steels
mechanical properties
slopes
Mechanical properties
Ultrafine
metals

Cite this

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title = "Superior strength in ultrafine-grained materials produced by SPD processing.",
abstract = "Recent studies demonstrated that the processing of metallic alloys by severe plastic deformation (SPD) can result in not only strong grain refinement but also leads to the formation of grain boundaries (GBs) with different structures, including GB segregations and precipitations. These nanostructural features of SPD-processed alloys produce considerable influence on their mechanical properties. The paper presents experimental data demonstrating a superstrength and positive slope of the HallPetch relation when passing from micro- to nanostructured state in a number of metallic materials subjected to severe plastic deformation. The nature of the superior strength is associated with new strengthening mechanisms and the difficulty of generation of dislocations from grain boundaries with segregations. This new approach is used for achieving the enhanced strength in several commercial Al and Ti alloys as well as steels subjected to SPD processing. {\circledC} 2013 The Japan Institute of Metals and Materials.",
author = "R.Z. Valiev",
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doi = "10.2320/matertrans.MA201325",
language = "English",
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publisher = "Japan Institute of Metals (JIM)",
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TY - JOUR

T1 - Superior strength in ultrafine-grained materials produced by SPD processing.

AU - Valiev, R.Z.

PY - 2014

Y1 - 2014

N2 - Recent studies demonstrated that the processing of metallic alloys by severe plastic deformation (SPD) can result in not only strong grain refinement but also leads to the formation of grain boundaries (GBs) with different structures, including GB segregations and precipitations. These nanostructural features of SPD-processed alloys produce considerable influence on their mechanical properties. The paper presents experimental data demonstrating a superstrength and positive slope of the HallPetch relation when passing from micro- to nanostructured state in a number of metallic materials subjected to severe plastic deformation. The nature of the superior strength is associated with new strengthening mechanisms and the difficulty of generation of dislocations from grain boundaries with segregations. This new approach is used for achieving the enhanced strength in several commercial Al and Ti alloys as well as steels subjected to SPD processing. © 2013 The Japan Institute of Metals and Materials.

AB - Recent studies demonstrated that the processing of metallic alloys by severe plastic deformation (SPD) can result in not only strong grain refinement but also leads to the formation of grain boundaries (GBs) with different structures, including GB segregations and precipitations. These nanostructural features of SPD-processed alloys produce considerable influence on their mechanical properties. The paper presents experimental data demonstrating a superstrength and positive slope of the HallPetch relation when passing from micro- to nanostructured state in a number of metallic materials subjected to severe plastic deformation. The nature of the superior strength is associated with new strengthening mechanisms and the difficulty of generation of dislocations from grain boundaries with segregations. This new approach is used for achieving the enhanced strength in several commercial Al and Ti alloys as well as steels subjected to SPD processing. © 2013 The Japan Institute of Metals and Materials.

U2 - 10.2320/matertrans.MA201325

DO - 10.2320/matertrans.MA201325

M3 - Literature review

VL - 55

SP - 13

EP - 18

JO - Materials Transactions

JF - Materials Transactions

SN - 0916-1821

IS - 1

ER -