Strategy for severe friction stir processing to obtain acute grain refinement of an Al-Zn-Mg-Cu alloy in three initial precipitation states

A. Orozco-Caballero; P. Hidalgo-Manrique; C. M. Cepeda-Jiménez; P. Rey; D. Verdera; O. A. Ruano; F. Carreño

doi:10.1016/j.matchar.2015.12.014

Strategy for severe friction stir processing to obtain acute grain refinement of an Al-Zn-Mg-Cu alloy in three initial precipitation states

A. Orozco-Caballero^*, P. Hidalgo-Manrique, C. M. Cepeda-Jiménez, P. Rey, D. Verdera, O. A. Ruano, F. Carreño

^*Corresponding author for this work

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

Abstract

An Al-Zn-Mg-Cu, Al 7075, alloy was subjected to friction stir processing (FSP) using several processing conditions, two different backing anvils and three initial precipitation states in order to reach the maximum feasible processing severity to produce ultrafine grain sizes. Microstructures formed by fine, equiaxed and highly misoriented grains were obtained. Grain sizes were situated in the range of 200-1000 nm, making FSP competitive with other severe plastic deformation techniques. No influence of the initial precipitation state in the processed grain size was perceived. In fact, the processing conditions and the cooling rate determine the observed grain size. It was found that the selection of the appropriate processing conditions delivered an ultrafine grain size, thus allowing suitable microstructural control.

Original language	English
Pages (from-to)	197-205
Number of pages	9
Journal	Materials Characterization
Volume	112
Early online date	17 Dec 2015
DOIs	https://doi.org/10.1016/j.matchar.2015.12.014
Publication status	Published - 1 Feb 2016

Keywords

Active cooling
Aluminium alloys
Friction stir processing
Grain refinement
Processing severity

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10.1016/j.matchar.2015.12.014

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title = "Strategy for severe friction stir processing to obtain acute grain refinement of an Al-Zn-Mg-Cu alloy in three initial precipitation states",

abstract = "An Al-Zn-Mg-Cu, Al 7075, alloy was subjected to friction stir processing (FSP) using several processing conditions, two different backing anvils and three initial precipitation states in order to reach the maximum feasible processing severity to produce ultrafine grain sizes. Microstructures formed by fine, equiaxed and highly misoriented grains were obtained. Grain sizes were situated in the range of 200-1000 nm, making FSP competitive with other severe plastic deformation techniques. No influence of the initial precipitation state in the processed grain size was perceived. In fact, the processing conditions and the cooling rate determine the observed grain size. It was found that the selection of the appropriate processing conditions delivered an ultrafine grain size, thus allowing suitable microstructural control.",

keywords = "Active cooling, Aluminium alloys, Friction stir processing, Grain refinement, Processing severity",

author = "A. Orozco-Caballero and P. Hidalgo-Manrique and Cepeda-Jim{\'e}nez, {C. M.} and P. Rey and D. Verdera and Ruano, {O. A.} and F. Carre{\~n}o",

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doi = "10.1016/j.matchar.2015.12.014",

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journal = "Materials Characterization",

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T1 - Strategy for severe friction stir processing to obtain acute grain refinement of an Al-Zn-Mg-Cu alloy in three initial precipitation states

AU - Orozco-Caballero, A.

AU - Hidalgo-Manrique, P.

AU - Cepeda-Jiménez, C. M.

AU - Rey, P.

AU - Verdera, D.

AU - Ruano, O. A.

AU - Carreño, F.

PY - 2016/2/1

Y1 - 2016/2/1

N2 - An Al-Zn-Mg-Cu, Al 7075, alloy was subjected to friction stir processing (FSP) using several processing conditions, two different backing anvils and three initial precipitation states in order to reach the maximum feasible processing severity to produce ultrafine grain sizes. Microstructures formed by fine, equiaxed and highly misoriented grains were obtained. Grain sizes were situated in the range of 200-1000 nm, making FSP competitive with other severe plastic deformation techniques. No influence of the initial precipitation state in the processed grain size was perceived. In fact, the processing conditions and the cooling rate determine the observed grain size. It was found that the selection of the appropriate processing conditions delivered an ultrafine grain size, thus allowing suitable microstructural control.

AB - An Al-Zn-Mg-Cu, Al 7075, alloy was subjected to friction stir processing (FSP) using several processing conditions, two different backing anvils and three initial precipitation states in order to reach the maximum feasible processing severity to produce ultrafine grain sizes. Microstructures formed by fine, equiaxed and highly misoriented grains were obtained. Grain sizes were situated in the range of 200-1000 nm, making FSP competitive with other severe plastic deformation techniques. No influence of the initial precipitation state in the processed grain size was perceived. In fact, the processing conditions and the cooling rate determine the observed grain size. It was found that the selection of the appropriate processing conditions delivered an ultrafine grain size, thus allowing suitable microstructural control.

KW - Active cooling

KW - Aluminium alloys

KW - Friction stir processing

KW - Grain refinement

KW - Processing severity

UR - http://www.scopus.com/inward/record.url?scp=84951938224&partnerID=8YFLogxK

U2 - 10.1016/j.matchar.2015.12.014

DO - 10.1016/j.matchar.2015.12.014

M3 - Article

AN - SCOPUS:84951938224

SN - 1044-5803

VL - 112

SP - 197

EP - 205

JO - Materials Characterization

JF - Materials Characterization

ER -

Strategy for severe friction stir processing to obtain acute grain refinement of an Al-Zn-Mg-Cu alloy in three initial precipitation states

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Keywords

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