Mechanical properties of intermetallic inclusions in Al 7075 alloys by micropillar compression

Sudhanshu S. Singh; Enyu Guo; Huxiao Xie; Nikhilesh Chawla

doi:10.1016/j.intermet.2015.03.008

Mechanical properties of intermetallic inclusions in Al 7075 alloys by micropillar compression

Sudhanshu S. Singh, Enyu Guo, Huxiao Xie, Nikhilesh Chawla

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

47 Scopus citations

Abstract

The constituent particles (also called inclusions) play an important role in the deformation behavior of Al 7075 alloys. The majority of inclusions in Al 7075 alloys can be classified as Fe-bearing and Si-bearing inclusions. Among them Al₇Cu₂Fe and Mg₂Si are predominant. In this study, the mechanical properties of these inclusions and Al 7075 matrix were studied using micropillar compression testing. Micropillars were fabricated by focused ion beam (FIB) milling and were tested using a nanoindenter equipped with a flat tip. For the first time, the stress-strain behavior of these intermetallic particles was obtained experimentally, resulting in the measurement of the compressive failure and yield strength. The stress-strain behavior obtained from pillar compression show that both inclusions possess higher strength than the Al 7075 matrix.

Original language	English (US)
Pages (from-to)	69-75
Number of pages	7
Journal	Intermetallics
Volume	62
DOIs	https://doi.org/10.1016/j.intermet.2015.03.008
State	Published - Jul 1 2015

Keywords

A. Intermetallics
B. Mechanical properties
F. Characterization

ASJC Scopus subject areas

Chemistry(all)
Mechanics of Materials
Mechanical Engineering
Metals and Alloys
Materials Chemistry

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10.1016/j.intermet.2015.03.008

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title = "Mechanical properties of intermetallic inclusions in Al 7075 alloys by micropillar compression",

abstract = "The constituent particles (also called inclusions) play an important role in the deformation behavior of Al 7075 alloys. The majority of inclusions in Al 7075 alloys can be classified as Fe-bearing and Si-bearing inclusions. Among them Al7Cu2Fe and Mg2Si are predominant. In this study, the mechanical properties of these inclusions and Al 7075 matrix were studied using micropillar compression testing. Micropillars were fabricated by focused ion beam (FIB) milling and were tested using a nanoindenter equipped with a flat tip. For the first time, the stress-strain behavior of these intermetallic particles was obtained experimentally, resulting in the measurement of the compressive failure and yield strength. The stress-strain behavior obtained from pillar compression show that both inclusions possess higher strength than the Al 7075 matrix.",

keywords = "A. Intermetallics, B. Mechanical properties, F. Characterization",

author = "Singh, {Sudhanshu S.} and Enyu Guo and Huxiao Xie and Nikhilesh Chawla",

note = "Funding Information: The authors are grateful for financial support from the Office of Naval Research (ONR) under Contract No. N00014-10-1-0350 (Dr. A. K. Vasudevan, Program Manager). The authors acknowledge the use of FIB-SEM facilities within the Leroy Eyring Center for Solid State Science at Arizona State University. Authors are thankful to Carl Mayer, Antony Kirubanandham, and C. Shashank Kaira at Arizona State University for helpful suggestions and discussions. Publisher Copyright: {\textcopyright} 2015 Elsevier Ltd. All rights reserved.",

year = "2015",

month = jul,

day = "1",

doi = "10.1016/j.intermet.2015.03.008",

language = "English (US)",

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AU - Singh, Sudhanshu S.

AU - Guo, Enyu

AU - Xie, Huxiao

AU - Chawla, Nikhilesh

N1 - Funding Information: The authors are grateful for financial support from the Office of Naval Research (ONR) under Contract No. N00014-10-1-0350 (Dr. A. K. Vasudevan, Program Manager). The authors acknowledge the use of FIB-SEM facilities within the Leroy Eyring Center for Solid State Science at Arizona State University. Authors are thankful to Carl Mayer, Antony Kirubanandham, and C. Shashank Kaira at Arizona State University for helpful suggestions and discussions. Publisher Copyright: © 2015 Elsevier Ltd. All rights reserved.

PY - 2015/7/1

Y1 - 2015/7/1

N2 - The constituent particles (also called inclusions) play an important role in the deformation behavior of Al 7075 alloys. The majority of inclusions in Al 7075 alloys can be classified as Fe-bearing and Si-bearing inclusions. Among them Al7Cu2Fe and Mg2Si are predominant. In this study, the mechanical properties of these inclusions and Al 7075 matrix were studied using micropillar compression testing. Micropillars were fabricated by focused ion beam (FIB) milling and were tested using a nanoindenter equipped with a flat tip. For the first time, the stress-strain behavior of these intermetallic particles was obtained experimentally, resulting in the measurement of the compressive failure and yield strength. The stress-strain behavior obtained from pillar compression show that both inclusions possess higher strength than the Al 7075 matrix.

AB - The constituent particles (also called inclusions) play an important role in the deformation behavior of Al 7075 alloys. The majority of inclusions in Al 7075 alloys can be classified as Fe-bearing and Si-bearing inclusions. Among them Al7Cu2Fe and Mg2Si are predominant. In this study, the mechanical properties of these inclusions and Al 7075 matrix were studied using micropillar compression testing. Micropillars were fabricated by focused ion beam (FIB) milling and were tested using a nanoindenter equipped with a flat tip. For the first time, the stress-strain behavior of these intermetallic particles was obtained experimentally, resulting in the measurement of the compressive failure and yield strength. The stress-strain behavior obtained from pillar compression show that both inclusions possess higher strength than the Al 7075 matrix.

KW - A. Intermetallics

KW - B. Mechanical properties

KW - F. Characterization

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EP - 75

JO - Intermetallics

JF - Intermetallics

ER -

Mechanical properties of intermetallic inclusions in Al 7075 alloys by micropillar compression

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