Structural coarsening during annealing of an aluminum plate heavily deformed using ECAE

Oleg V. Mishin; Yubin Zhang; A. Godfrey

doi:10.1088/1757-899X/89/1/012035

Structural coarsening during annealing of an aluminum plate heavily deformed using ECAE

Tsinghua University

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Abstract

The microstructure and softening behaviour have been investigated in an aluminum plate heavily deformed by equal channel angular extrusion and subsequently annealed at 170 °C. It is found that at this temperature the microstructure evolves by coarsening with no apparent signs of recrystallization even after 2 h of annealing. Both coarsening and softening are rapid within first 10 minutes of annealing followed by a slower evolution with increasing annealing duration. Evidence of triple junction (TJ) motion during coarsening is obtained by inspecting the microstructure in one region using the electron backscatter diffraction technique both before and after annealing for 10 minutes. The fraction of fast-migrating TJs is found to strongly depend of the type of boundaries composing a junction. The greatest fraction of fast-migrating TJs is in the group, where all boundaries forming a junction are high angle boundaries. The fraction of fast-migrating TJs is significantly lower for junctions containing at least one low angle boundary.

Original language	English
Article number	012035
Journal	I O P Conference Series: Materials Science and Engineering
Volume	89
Number of pages	6
ISSN	1757-8981
DOIs	https://doi.org/10.1088/1757-899X/89/1/012035
Publication status	Published - 2015
Event	36th Risø International Symposium on Materials Science - DTU Risø Campus, Roskilde, Denmark Duration: 7 Sept 2015 → 11 Sept 2015 Conference number: 36

Conference

Conference	36th Risø International Symposium on Materials Science
Number	36
Location	DTU Risø Campus
Country/Territory	Denmark
City	Roskilde
Period	07/09/2015 → 11/09/2015

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Content from this work may be used under the terms of the Creative Commons Attribution 3.0 licence. Any further distribution of this work must maintain attribution to the author(s) and the title of the work, journal citation and DOI. Published under licence by IOP Publishing Ltd

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@inproceedings{18bd74a0e4ff4d43b3220c4395e0f2ac,

title = "Structural coarsening during annealing of an aluminum plate heavily deformed using ECAE",

abstract = "The microstructure and softening behaviour have been investigated in an aluminum plate heavily deformed by equal channel angular extrusion and subsequently annealed at 170 °C. It is found that at this temperature the microstructure evolves by coarsening with no apparent signs of recrystallization even after 2 h of annealing. Both coarsening and softening are rapid within first 10 minutes of annealing followed by a slower evolution with increasing annealing duration. Evidence of triple junction (TJ) motion during coarsening is obtained by inspecting the microstructure in one region using the electron backscatter diffraction technique both before and after annealing for 10 minutes. The fraction of fast-migrating TJs is found to strongly depend of the type of boundaries composing a junction. The greatest fraction of fast-migrating TJs is in the group, where all boundaries forming a junction are high angle boundaries. The fraction of fast-migrating TJs is significantly lower for junctions containing at least one low angle boundary.",

author = "Mishin, \{Oleg V.\} and Yubin Zhang and A. Godfrey",

note = "Content from this work may be used under the terms of the Creative Commons Attribution 3.0 licence. Any further distribution of this work must maintain attribution to the author(s) and the title of the work, journal citation and DOI. Published under licence by IOP Publishing Ltd; 36th Ris{\o} International Symposium on Materials Science ; Conference date: 07-09-2015 Through 11-09-2015",

year = "2015",

doi = "10.1088/1757-899X/89/1/012035",

language = "English",

volume = "89",

journal = "I O P Conference Series: Materials Science and Engineering",

issn = "1757-8981",

publisher = "IOP Publishing",

}

TY - GEN

T1 - Structural coarsening during annealing of an aluminum plate heavily deformed using ECAE

AU - Mishin, Oleg V.

AU - Zhang, Yubin

AU - Godfrey, A.

N1 - Conference code: 36

PY - 2015

Y1 - 2015

N2 - The microstructure and softening behaviour have been investigated in an aluminum plate heavily deformed by equal channel angular extrusion and subsequently annealed at 170 °C. It is found that at this temperature the microstructure evolves by coarsening with no apparent signs of recrystallization even after 2 h of annealing. Both coarsening and softening are rapid within first 10 minutes of annealing followed by a slower evolution with increasing annealing duration. Evidence of triple junction (TJ) motion during coarsening is obtained by inspecting the microstructure in one region using the electron backscatter diffraction technique both before and after annealing for 10 minutes. The fraction of fast-migrating TJs is found to strongly depend of the type of boundaries composing a junction. The greatest fraction of fast-migrating TJs is in the group, where all boundaries forming a junction are high angle boundaries. The fraction of fast-migrating TJs is significantly lower for junctions containing at least one low angle boundary.

AB - The microstructure and softening behaviour have been investigated in an aluminum plate heavily deformed by equal channel angular extrusion and subsequently annealed at 170 °C. It is found that at this temperature the microstructure evolves by coarsening with no apparent signs of recrystallization even after 2 h of annealing. Both coarsening and softening are rapid within first 10 minutes of annealing followed by a slower evolution with increasing annealing duration. Evidence of triple junction (TJ) motion during coarsening is obtained by inspecting the microstructure in one region using the electron backscatter diffraction technique both before and after annealing for 10 minutes. The fraction of fast-migrating TJs is found to strongly depend of the type of boundaries composing a junction. The greatest fraction of fast-migrating TJs is in the group, where all boundaries forming a junction are high angle boundaries. The fraction of fast-migrating TJs is significantly lower for junctions containing at least one low angle boundary.

U2 - 10.1088/1757-899X/89/1/012035

DO - 10.1088/1757-899X/89/1/012035

M3 - Conference article

SN - 1757-8981

VL - 89

JO - I O P Conference Series: Materials Science and Engineering

JF - I O P Conference Series: Materials Science and Engineering

M1 - 012035

T2 - 36th Risø International Symposium on Materials Science

Y2 - 7 September 2015 through 11 September 2015

ER -

Structural coarsening during annealing of an aluminum plate heavily deformed using ECAE

Abstract

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