Elevated temperature behavior of SePD materials: Superplasticity or enhanced ductility?

A. V. Sergueeva; N. A. Mara; R. Z. Valiev; A. K. Mukherjee

doi:10.1016/j.msea.2005.08.020

Elevated temperature behavior of SePD materials: Superplasticity or enhanced ductility?

A. V. Sergueeva, N. A. Mara, R. Z. Valiev, A. K. Mukherjee

Chemical Engineering and Materials Science

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

16 Scopus citations

Abstract

The generated results on superplastic flow (SPF) in materials produced by severe plastic deformation (SePD) have been analyzed. Formation of sliding surfaces with subsequent cooperative grain boundary sliding (CGBS) has been demonstrated to be a main deformation mechanism of superplasticity under conditions of microstructural stability. A substantial role of dislocation glide in accommodation processes is shown. When grain growth is observed during deformation, continuous grain boundary migration prevents formation of slide surfaces and CGBS is restrained. In this case, deformation of the material is more likely to occur by dislocation or diffusion creep than true SPF despite relatively large strains being reached.

Original language	English (US)
Pages (from-to)	413-416
Number of pages	4
Journal	Materials Science and Engineering: A
Volume	410-411
DOIs	https://doi.org/10.1016/j.msea.2005.08.020
State	Published - Nov 25 2005

Bibliographical note

Funding Information:
This material is based upon work supported by National Science Foundation under Grant No. NSF-DMR-0240144 and the National Center for Electron Microscopy (NCEM) at Lawrence Berkeley laboratory (proposal #257 for electron microscopy support).

Keywords

Plastic behavior
Severe plastic deformation
Superplasticity

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10.1016/j.msea.2005.08.020

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title = "Elevated temperature behavior of SePD materials: Superplasticity or enhanced ductility?",

abstract = "The generated results on superplastic flow (SPF) in materials produced by severe plastic deformation (SePD) have been analyzed. Formation of sliding surfaces with subsequent cooperative grain boundary sliding (CGBS) has been demonstrated to be a main deformation mechanism of superplasticity under conditions of microstructural stability. A substantial role of dislocation glide in accommodation processes is shown. When grain growth is observed during deformation, continuous grain boundary migration prevents formation of slide surfaces and CGBS is restrained. In this case, deformation of the material is more likely to occur by dislocation or diffusion creep than true SPF despite relatively large strains being reached.",

keywords = "Plastic behavior, Severe plastic deformation, Superplasticity",

author = "Sergueeva, {A. V.} and Mara, {N. A.} and Valiev, {R. Z.} and Mukherjee, {A. K.}",

note = "Funding Information: This material is based upon work supported by National Science Foundation under Grant No. NSF-DMR-0240144 and the National Center for Electron Microscopy (NCEM) at Lawrence Berkeley laboratory (proposal #257 for electron microscopy support).",

year = "2005",

month = nov,

day = "25",

doi = "10.1016/j.msea.2005.08.020",

language = "English (US)",

volume = "410-411",

pages = "413--416",

journal = "Materials Science and Engineering: A",

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T1 - Elevated temperature behavior of SePD materials

T2 - Superplasticity or enhanced ductility?

AU - Sergueeva, A. V.

AU - Mara, N. A.

AU - Valiev, R. Z.

AU - Mukherjee, A. K.

N1 - Funding Information: This material is based upon work supported by National Science Foundation under Grant No. NSF-DMR-0240144 and the National Center for Electron Microscopy (NCEM) at Lawrence Berkeley laboratory (proposal #257 for electron microscopy support).

PY - 2005/11/25

Y1 - 2005/11/25

N2 - The generated results on superplastic flow (SPF) in materials produced by severe plastic deformation (SePD) have been analyzed. Formation of sliding surfaces with subsequent cooperative grain boundary sliding (CGBS) has been demonstrated to be a main deformation mechanism of superplasticity under conditions of microstructural stability. A substantial role of dislocation glide in accommodation processes is shown. When grain growth is observed during deformation, continuous grain boundary migration prevents formation of slide surfaces and CGBS is restrained. In this case, deformation of the material is more likely to occur by dislocation or diffusion creep than true SPF despite relatively large strains being reached.

AB - The generated results on superplastic flow (SPF) in materials produced by severe plastic deformation (SePD) have been analyzed. Formation of sliding surfaces with subsequent cooperative grain boundary sliding (CGBS) has been demonstrated to be a main deformation mechanism of superplasticity under conditions of microstructural stability. A substantial role of dislocation glide in accommodation processes is shown. When grain growth is observed during deformation, continuous grain boundary migration prevents formation of slide surfaces and CGBS is restrained. In this case, deformation of the material is more likely to occur by dislocation or diffusion creep than true SPF despite relatively large strains being reached.

KW - Plastic behavior

KW - Severe plastic deformation

KW - Superplasticity

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DO - 10.1016/j.msea.2005.08.020

M3 - Article

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SN - 0921-5093

VL - 410-411

SP - 413

EP - 416

JO - Materials Science and Engineering: A

JF - Materials Science and Engineering: A

ER -

Elevated temperature behavior of SePD materials: Superplasticity or enhanced ductility?

Abstract

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