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Title: Probing Novel Microstructural Evolution Mechanisms in Aluminum Alloys Using 4D Nanoscale Characterization

Abstract

Dispersions of nanoscale precipitates in metallic alloys have been known to play a key role in strengthening, by increasing their strain hardenability and providing resistance to deformation. Although these phenomena have been extensively investigated in the last century, the traditional approaches employed in the past have not rendered an authoritative microstructural understanding in such materials. The effect of the precipitates’ inherent complex morphology and their 3D spatial distribution on evolution and deformation behavior have often been precluded. This study reports, for the first time, implementation of synchrotron-based hard X-ray nanotomography in Al–Cu alloys to measure kinetics of different nanoscale phases in 3D, and reveals insights behind some of the observed novel phase transformation reactions. The experimental results of the present study reconcile with coarsening models from the Lifshitz–Slyozov–Wagner theory to an unprecedented extent, thereby establishing a new paradigm for thermodynamic analysis of precipitate assemblies. Lastly, this study sheds light on the possibilities for establishing new theories for dislocation–particle interactions, based on the limitations of using the Orowan equation in estimating precipitation strengthening.

Authors:
 [1];  [2];  [3];  [1];  [1];  [2];  [1]
  1. Arizona State Univ., Tempe, AZ (United States)
  2. Argonne National Lab. (ANL), Argonne, IL (United States)
  3. Arizona State Univ., Tempe, AZ (United States); Indian Institute of Technology Kanpur, Uttar Pradesh (India)
Publication Date:
Research Org.:
Argonne National Lab. (ANL), Argonne, IL (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22); US Army Research Office (ARO)
OSTI Identifier:
1416537
Alternate Identifier(s):
OSTI ID: 1390350; OSTI ID: 1426224
Grant/Contract Number:  
AC02-06CH11357
Resource Type:
Accepted Manuscript
Journal Name:
Advanced Materials
Additional Journal Information:
Journal Volume: 29; Journal Issue: 41; Journal ID: ISSN 0935-9648
Publisher:
Wiley
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; aluminum alloys; coarsening; microstructural evolution; synchrotron tomography; transmission X‐ray microscopy

Citation Formats

Kaira, C. Shashank, De Andrade, V., Singh, Sudhanshu S., Kantzos, C., Kirubanandham, Antony, De Carlo, F., and Chawla, Nikhilesh. Probing Novel Microstructural Evolution Mechanisms in Aluminum Alloys Using 4D Nanoscale Characterization. United States: N. p., 2017. Web. doi:10.1002/adma.201703482.
Kaira, C. Shashank, De Andrade, V., Singh, Sudhanshu S., Kantzos, C., Kirubanandham, Antony, De Carlo, F., & Chawla, Nikhilesh. Probing Novel Microstructural Evolution Mechanisms in Aluminum Alloys Using 4D Nanoscale Characterization. United States. doi:10.1002/adma.201703482.
Kaira, C. Shashank, De Andrade, V., Singh, Sudhanshu S., Kantzos, C., Kirubanandham, Antony, De Carlo, F., and Chawla, Nikhilesh. Thu . "Probing Novel Microstructural Evolution Mechanisms in Aluminum Alloys Using 4D Nanoscale Characterization". United States. doi:10.1002/adma.201703482. https://www.osti.gov/servlets/purl/1416537.
@article{osti_1416537,
title = {Probing Novel Microstructural Evolution Mechanisms in Aluminum Alloys Using 4D Nanoscale Characterization},
author = {Kaira, C. Shashank and De Andrade, V. and Singh, Sudhanshu S. and Kantzos, C. and Kirubanandham, Antony and De Carlo, F. and Chawla, Nikhilesh},
abstractNote = {Dispersions of nanoscale precipitates in metallic alloys have been known to play a key role in strengthening, by increasing their strain hardenability and providing resistance to deformation. Although these phenomena have been extensively investigated in the last century, the traditional approaches employed in the past have not rendered an authoritative microstructural understanding in such materials. The effect of the precipitates’ inherent complex morphology and their 3D spatial distribution on evolution and deformation behavior have often been precluded. This study reports, for the first time, implementation of synchrotron-based hard X-ray nanotomography in Al–Cu alloys to measure kinetics of different nanoscale phases in 3D, and reveals insights behind some of the observed novel phase transformation reactions. The experimental results of the present study reconcile with coarsening models from the Lifshitz–Slyozov–Wagner theory to an unprecedented extent, thereby establishing a new paradigm for thermodynamic analysis of precipitate assemblies. Lastly, this study sheds light on the possibilities for establishing new theories for dislocation–particle interactions, based on the limitations of using the Orowan equation in estimating precipitation strengthening.},
doi = {10.1002/adma.201703482},
journal = {Advanced Materials},
number = 41,
volume = 29,
place = {United States},
year = {2017},
month = {9}
}

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Cited by: 5 works
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