Microstructural evolution and deformation behavior of Al-Cu alloys: A Transmission X-ray Microscopy (TXM) and micropillar compression study

C. Shashank Kaira; Christopher Kantzos; Jason J. Williams; Vincent De Andrade; Francesco De Carlo; Nikhilesh Chawla

doi:10.1016/j.actamat.2017.11.009

Microstructural evolution and deformation behavior of Al-Cu alloys: A Transmission X-ray Microscopy (TXM) and micropillar compression study

C. Shashank Kaira, Christopher Kantzos, Jason J. Williams, Vincent De Andrade, Francesco De Carlo, Nikhilesh Chawla

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

40 Scopus citations

Abstract

A unique approach to correlating an evolving 3D microstructure in an Al-Cu alloy and its micro-scale mechanical properties has been introduced. Using these nanoscale three-dimensional microstructures derived from Transmission X-ray Microscopy (TXM), individual contributions from different strengthening mechanisms were quantified. The spatial distribution and morphology of the individual θ′ and θ phases were seen to play an important role in influencing dislocation storage. Uniaxial micro-compression experiments were used to quantify the stress-strain response of the alloy at different aging times. Transmission electron microscopy (TEM) aided in discerning dislocation activity at these precipitates. A model is proposed to accurately predict the variation in yield stress by using appropriate morphological parameters from the 3D microstructure and its validity has been corroborated using experimental measurements. Distributions of 2D and 3D inter-precipitate spacing were seen to provide crucial insights on influencing deformation in such precipitation-strengthened alloys. Finally, the transition in deformation behavior and origin of numerous strain bursts were investigated using in situ micropillar compression testing.

Original language	English (US)
Pages (from-to)	419-431
Number of pages	13
Journal	Acta Materialia
Volume	144
DOIs	https://doi.org/10.1016/j.actamat.2017.11.009
State	Published - Feb 1 2018

Keywords

Aluminum alloys
FIB
Nanoindentation
TEM
Transmission X-ray Microscopy (TXM)

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Ceramics and Composites
Polymers and Plastics
Metals and Alloys

Access to Document

10.1016/j.actamat.2017.11.009

Cite this

@article{8f99c81a198942bcaaaaadfc24824c78,

title = "Microstructural evolution and deformation behavior of Al-Cu alloys: A Transmission X-ray Microscopy (TXM) and micropillar compression study",

abstract = "A unique approach to correlating an evolving 3D microstructure in an Al-Cu alloy and its micro-scale mechanical properties has been introduced. Using these nanoscale three-dimensional microstructures derived from Transmission X-ray Microscopy (TXM), individual contributions from different strengthening mechanisms were quantified. The spatial distribution and morphology of the individual θ′ and θ phases were seen to play an important role in influencing dislocation storage. Uniaxial micro-compression experiments were used to quantify the stress-strain response of the alloy at different aging times. Transmission electron microscopy (TEM) aided in discerning dislocation activity at these precipitates. A model is proposed to accurately predict the variation in yield stress by using appropriate morphological parameters from the 3D microstructure and its validity has been corroborated using experimental measurements. Distributions of 2D and 3D inter-precipitate spacing were seen to provide crucial insights on influencing deformation in such precipitation-strengthened alloys. Finally, the transition in deformation behavior and origin of numerous strain bursts were investigated using in situ micropillar compression testing.",

keywords = "Aluminum alloys, FIB, Nanoindentation, TEM, Transmission X-ray Microscopy (TXM)",

author = "Kaira, {C. Shashank} and Christopher Kantzos and Williams, {Jason J.} and {De Andrade}, Vincent and {De Carlo}, Francesco and Nikhilesh Chawla",

note = "Funding Information: The authors are thankful for financial support from the Army Research Office (ARO) under Contract No. W911NF1410550 (Dr. Michael Bakas and Dr. David Stepp, Program Managers). We acknowledge the use of resources at Beamline 32-ID-C of the Advanced Photon Source, a U.S. Department of Energy (DOE) Office of Science User Facility operated for the DOE Office of Science by Argonne National Laboratory under Contract No. DE-AC02-06CH11357 . We also acknowledge the use of facilities within the Center for 4DMS and the Leroy Eyring Center for Solid State Science at Arizona State University. We are also thankful to Dr. Warren Oliver and Jennifer Hay (Nanomechanics, Inc.) for aiding in conducting the in situ experiments. Publisher Copyright: {\textcopyright} 2017 Acta Materialia Inc.",

year = "2018",

month = feb,

day = "1",

doi = "10.1016/j.actamat.2017.11.009",

language = "English (US)",

volume = "144",

pages = "419--431",

journal = "Acta Materialia",

issn = "1359-6454",

publisher = "Elsevier Limited",

}

TY - JOUR

T1 - Microstructural evolution and deformation behavior of Al-Cu alloys

T2 - A Transmission X-ray Microscopy (TXM) and micropillar compression study

AU - Kaira, C. Shashank

AU - Kantzos, Christopher

AU - Williams, Jason J.

AU - De Andrade, Vincent

AU - De Carlo, Francesco

AU - Chawla, Nikhilesh

N1 - Funding Information: The authors are thankful for financial support from the Army Research Office (ARO) under Contract No. W911NF1410550 (Dr. Michael Bakas and Dr. David Stepp, Program Managers). We acknowledge the use of resources at Beamline 32-ID-C of the Advanced Photon Source, a U.S. Department of Energy (DOE) Office of Science User Facility operated for the DOE Office of Science by Argonne National Laboratory under Contract No. DE-AC02-06CH11357 . We also acknowledge the use of facilities within the Center for 4DMS and the Leroy Eyring Center for Solid State Science at Arizona State University. We are also thankful to Dr. Warren Oliver and Jennifer Hay (Nanomechanics, Inc.) for aiding in conducting the in situ experiments. Publisher Copyright: © 2017 Acta Materialia Inc.

PY - 2018/2/1

Y1 - 2018/2/1

N2 - A unique approach to correlating an evolving 3D microstructure in an Al-Cu alloy and its micro-scale mechanical properties has been introduced. Using these nanoscale three-dimensional microstructures derived from Transmission X-ray Microscopy (TXM), individual contributions from different strengthening mechanisms were quantified. The spatial distribution and morphology of the individual θ′ and θ phases were seen to play an important role in influencing dislocation storage. Uniaxial micro-compression experiments were used to quantify the stress-strain response of the alloy at different aging times. Transmission electron microscopy (TEM) aided in discerning dislocation activity at these precipitates. A model is proposed to accurately predict the variation in yield stress by using appropriate morphological parameters from the 3D microstructure and its validity has been corroborated using experimental measurements. Distributions of 2D and 3D inter-precipitate spacing were seen to provide crucial insights on influencing deformation in such precipitation-strengthened alloys. Finally, the transition in deformation behavior and origin of numerous strain bursts were investigated using in situ micropillar compression testing.

AB - A unique approach to correlating an evolving 3D microstructure in an Al-Cu alloy and its micro-scale mechanical properties has been introduced. Using these nanoscale three-dimensional microstructures derived from Transmission X-ray Microscopy (TXM), individual contributions from different strengthening mechanisms were quantified. The spatial distribution and morphology of the individual θ′ and θ phases were seen to play an important role in influencing dislocation storage. Uniaxial micro-compression experiments were used to quantify the stress-strain response of the alloy at different aging times. Transmission electron microscopy (TEM) aided in discerning dislocation activity at these precipitates. A model is proposed to accurately predict the variation in yield stress by using appropriate morphological parameters from the 3D microstructure and its validity has been corroborated using experimental measurements. Distributions of 2D and 3D inter-precipitate spacing were seen to provide crucial insights on influencing deformation in such precipitation-strengthened alloys. Finally, the transition in deformation behavior and origin of numerous strain bursts were investigated using in situ micropillar compression testing.

KW - Aluminum alloys

KW - FIB

KW - Nanoindentation

KW - TEM

KW - Transmission X-ray Microscopy (TXM)

UR - http://www.scopus.com/inward/record.url?scp=85033492098&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85033492098&partnerID=8YFLogxK

U2 - 10.1016/j.actamat.2017.11.009

DO - 10.1016/j.actamat.2017.11.009

M3 - Article

AN - SCOPUS:85033492098

SN - 1359-6454

VL - 144

SP - 419

EP - 431

JO - Acta Materialia

JF - Acta Materialia

ER -

Microstructural evolution and deformation behavior of Al-Cu alloys: A Transmission X-ray Microscopy (TXM) and micropillar compression study

Abstract

Keywords

ASJC Scopus subject areas

Access to Document

Other files and links

Fingerprint

Cite this