Structure and property evolutions of  ECAPed 7075 Al alloy during annealing

Y. H. Zhao; X. Z. Liao; Z. Jin; R. Z. Valiev; Y. T. Zhu

Structure and property evolutions of ECAPed 7075 Al alloy during annealing

Y. H. Zhao, X. Z. Liao, Z. Jin, R. Z. Valiev, Y. T. Zhu

Research output: Chapters, Conference Papers, Creative and Literary Works › RGC 32 - Refereed conference paper (with host publication) › peer-review

7 Citations (Scopus)

Abstract

Structure and microhardness evolutions of equal-channel angular pressing (BCAP) processed and coarse-grained (CG) 7075 Al alloys during differential scanning calorimeter (DSC) were investigated by x-ray diffraction (XRD), transmission electron microscopy (TEM) and microhardness measurements. After one-month aging at room temperature, the microhardness of the ECAP processed sample is about 50% larger than that of the CG sample. During DSC annealing, the microhardness of the ECAP processed sample decreased gradually, while a hardening peak appeared for the CG sample. XRD and TEM show that the hardening peak of the CG sample was mainly caused by the precipitation hardening of the Guinier-Preston (GP) zone. For the ECAP processed sample, upon annealing the microstrain (dislocation density) decreased and the crystallites grew, which decreased the hardness and overcompensated the GP zone precipitation hardening. DSC analysis indicates ECAP process only promoted the phase precipitation, but did not change the sequence of phase precipitation.

Original language	English
Title of host publication	Ultrafine Grained Materials III
Editors	Yuntian T. Zhu, Terence G. Langdon, Ruslan Z. Valiev, S. Lee Semiatin, Dong H. Shin, Terry C. Lowe
Publisher	Minerals, Metals & Materials Society
Pages	511-516
ISBN (Print)	0873395719, 9780873395717
Publication status	Published - Mar 2004
Externally published	Yes
Event	2004 TMS Annual Meeting: Ultrafine Grained Materials III - Charlotte, NC., United States Duration: 14 Mar 2004 → 18 Mar 2004 Conference number: 133rd https://www.tms.org/meetings/annual-04/annmtg04home.html https://www.tms.org/Meetings/Annual-04/TechProg/Annual04-techprog-full.pdf https://www.tib.eu/en/search/id/TIBKAT%3A385812965/Ultrafine-grained-materials-III-proceedings-of/

Conference

Conference	2004 TMS Annual Meeting
Place	United States
City	Charlotte, NC.
Period	14/03/04 → 18/03/04
Internet address	https://www.tms.org/meetings/annual-04/annmtg04home.html https://www.tms.org/Meetings/Annual-04/TechProg/Annual04-techprog-full.pdf https://www.tib.eu/en/search/id/TIBKAT%3A385812965/Ultrafine-grained-materials-III-proceedings-of/

Research Keywords

Aging hardening
Al alloy
Dislocation density
Grain size
Lattice parameter
Microhardness
Microstrain
Severe plastic deformation

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@inproceedings{cc57b3fd7d764be9b05ee7b85aa3a199,

title = "Structure and property evolutions of ECAPed 7075 Al alloy during annealing",

abstract = "Structure and microhardness evolutions of equal-channel angular pressing (BCAP) processed and coarse-grained (CG) 7075 Al alloys during differential scanning calorimeter (DSC) were investigated by x-ray diffraction (XRD), transmission electron microscopy (TEM) and microhardness measurements. After one-month aging at room temperature, the microhardness of the ECAP processed sample is about 50% larger than that of the CG sample. During DSC annealing, the microhardness of the ECAP processed sample decreased gradually, while a hardening peak appeared for the CG sample. XRD and TEM show that the hardening peak of the CG sample was mainly caused by the precipitation hardening of the Guinier-Preston (GP) zone. For the ECAP processed sample, upon annealing the microstrain (dislocation density) decreased and the crystallites grew, which decreased the hardness and overcompensated the GP zone precipitation hardening. DSC analysis indicates ECAP process only promoted the phase precipitation, but did not change the sequence of phase precipitation.",

keywords = "Aging hardening, Al alloy, Dislocation density, Grain size, Lattice parameter, Microhardness, Microstrain, Severe plastic deformation, Aging hardening, Al alloy, Dislocation density, Grain size, Lattice parameter, Microhardness, Microstrain, Severe plastic deformation, Aging hardening, Al alloy, Dislocation density, Grain size, Lattice parameter, Microhardness, Microstrain, Severe plastic deformation",

author = "Zhao, {Y. H.} and Liao, {X. Z.} and Z. Jin and Valiev, {R. Z.} and Zhu, {Y. T.}",

year = "2004",

month = mar,

language = "English",

isbn = "0873395719",

pages = "511--516",

editor = "Zhu, {Yuntian T. } and Langdon, {Terence G.} and Valiev, {Ruslan Z.} and Semiatin, {S. Lee} and Shin, {Dong H. } and Lowe, {Terry C. }",

booktitle = "Ultrafine Grained Materials III",

publisher = "Minerals, Metals & Materials Society",

address = "United States",

note = "2004 TMS Annual Meeting : Ultrafine Grained Materials III ; Conference date: 14-03-2004 Through 18-03-2004",

url = "https://www.tms.org/meetings/annual-04/annmtg04home.html, https://www.tms.org/Meetings/Annual-04/TechProg/Annual04-techprog-full.pdf, https://www.tib.eu/en/search/id/TIBKAT%3A385812965/Ultrafine-grained-materials-III-proceedings-of/",

}

Structure and property evolutions of ECAPed 7075 Al alloy during annealing. / Zhao, Y. H.; Liao, X. Z.; Jin, Z. et al.
Ultrafine Grained Materials III. ed. / Yuntian T. Zhu; Terence G. Langdon; Ruslan Z. Valiev; S. Lee Semiatin; Dong H. Shin; Terry C. Lowe. Minerals, Metals & Materials Society, 2004. p. 511-516.

Research output: Chapters, Conference Papers, Creative and Literary Works › RGC 32 - Refereed conference paper (with host publication) › peer-review

TY - GEN

T1 - Structure and property evolutions of ECAPed 7075 Al alloy during annealing

AU - Zhao, Y. H.

AU - Liao, X. Z.

AU - Jin, Z.

AU - Valiev, R. Z.

AU - Zhu, Y. T.

N1 - Conference code: 133rd

PY - 2004/3

Y1 - 2004/3

N2 - Structure and microhardness evolutions of equal-channel angular pressing (BCAP) processed and coarse-grained (CG) 7075 Al alloys during differential scanning calorimeter (DSC) were investigated by x-ray diffraction (XRD), transmission electron microscopy (TEM) and microhardness measurements. After one-month aging at room temperature, the microhardness of the ECAP processed sample is about 50% larger than that of the CG sample. During DSC annealing, the microhardness of the ECAP processed sample decreased gradually, while a hardening peak appeared for the CG sample. XRD and TEM show that the hardening peak of the CG sample was mainly caused by the precipitation hardening of the Guinier-Preston (GP) zone. For the ECAP processed sample, upon annealing the microstrain (dislocation density) decreased and the crystallites grew, which decreased the hardness and overcompensated the GP zone precipitation hardening. DSC analysis indicates ECAP process only promoted the phase precipitation, but did not change the sequence of phase precipitation.

AB - Structure and microhardness evolutions of equal-channel angular pressing (BCAP) processed and coarse-grained (CG) 7075 Al alloys during differential scanning calorimeter (DSC) were investigated by x-ray diffraction (XRD), transmission electron microscopy (TEM) and microhardness measurements. After one-month aging at room temperature, the microhardness of the ECAP processed sample is about 50% larger than that of the CG sample. During DSC annealing, the microhardness of the ECAP processed sample decreased gradually, while a hardening peak appeared for the CG sample. XRD and TEM show that the hardening peak of the CG sample was mainly caused by the precipitation hardening of the Guinier-Preston (GP) zone. For the ECAP processed sample, upon annealing the microstrain (dislocation density) decreased and the crystallites grew, which decreased the hardness and overcompensated the GP zone precipitation hardening. DSC analysis indicates ECAP process only promoted the phase precipitation, but did not change the sequence of phase precipitation.

KW - Aging hardening

KW - Al alloy

KW - Dislocation density

KW - Grain size

KW - Lattice parameter

KW - Microhardness

KW - Microstrain

KW - Severe plastic deformation

KW - Aging hardening

KW - Al alloy

KW - Dislocation density

KW - Grain size

KW - Lattice parameter

KW - Microhardness

KW - Microstrain

KW - Severe plastic deformation

KW - Aging hardening

KW - Al alloy

KW - Dislocation density

KW - Grain size

KW - Lattice parameter

KW - Microhardness

KW - Microstrain

KW - Severe plastic deformation

UR - http://www.scopus.com/inward/record.url?scp=3042825344&partnerID=8YFLogxK

UR - https://www.scopus.com/record/pubmetrics.uri?eid=2-s2.0-3042825344&origin=recordpage

M3 - RGC 32 - Refereed conference paper (with host publication)

SN - 0873395719

SN - 9780873395717

SP - 511

EP - 516

BT - Ultrafine Grained Materials III

A2 - Zhu, Yuntian T.

A2 - Langdon, Terence G.

A2 - Valiev, Ruslan Z.

A2 - Semiatin, S. Lee

A2 - Shin, Dong H.

A2 - Lowe, Terry C.

PB - Minerals, Metals & Materials Society

T2 - 2004 TMS Annual Meeting

Y2 - 14 March 2004 through 18 March 2004

ER -

Structure and property evolutions of ECAPed 7075 Al alloy during annealing

Abstract

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Research Keywords

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