Ultrahigh strength and plasticity in laser rapid solidified Al–Si nanoscale eutectics
Abstract
As-cast Al–20wt.% Si alloys were processed via laser rapid solidification (LRS) techniques to create eutectic microstructures with nanoscale interconnected, nanotwinned Si fibers. LRS morphologies exhibit higher flow stress, exceeding 800 MPa and uniform plastic deformation above 20% compared to as-cast alloy that fractures at strains below 8% at flow strength of approximately 200 MPa. The strengthening mechanisms of LRS morphologies are interpreted in terms of the interfacial constraints: increase in yield strength as well as strain hardening rate due to nanoscale confined slip in fibrous Al–Si eutectic, and load transfer and eventual plasticity in the nanoscale Si fibers.
- Authors:
-
[1];
[1];
[2];
[1]
- Univ. of Michigan, Ann Arbor, MI (United States)
- Univ. of Nebraska, Lincoln, NE (United States)
- Publication Date:
- Research Org.:
- Univ. of Michigan, Ann Arbor, MI (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC), Basic Energy Sciences (BES)
- OSTI Identifier:
- 1683629
- Grant/Contract Number:
- SC0016808
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Materials Research Letters
- Additional Journal Information:
- Journal Volume: 8; Journal Issue: 8; Journal ID: ISSN 2166-3831
- Publisher:
- Taylor and Francis
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 36 MATERIALS SCIENCE
Citation Formats
Lien, Huai-Hsun, Mazumder, Jyoti, Wang, Jian, and Misra, Amit. Ultrahigh strength and plasticity in laser rapid solidified Al–Si nanoscale eutectics. United States: N. p., 2020.
Web. doi:10.1080/21663831.2020.1755380.
Lien, Huai-Hsun, Mazumder, Jyoti, Wang, Jian, & Misra, Amit. Ultrahigh strength and plasticity in laser rapid solidified Al–Si nanoscale eutectics. United States. https://doi.org/10.1080/21663831.2020.1755380
Lien, Huai-Hsun, Mazumder, Jyoti, Wang, Jian, and Misra, Amit. Tue .
"Ultrahigh strength and plasticity in laser rapid solidified Al–Si nanoscale eutectics". United States. https://doi.org/10.1080/21663831.2020.1755380. https://www.osti.gov/servlets/purl/1683629.
@article{osti_1683629,
title = {Ultrahigh strength and plasticity in laser rapid solidified Al–Si nanoscale eutectics},
author = {Lien, Huai-Hsun and Mazumder, Jyoti and Wang, Jian and Misra, Amit},
abstractNote = {As-cast Al–20wt.% Si alloys were processed via laser rapid solidification (LRS) techniques to create eutectic microstructures with nanoscale interconnected, nanotwinned Si fibers. LRS morphologies exhibit higher flow stress, exceeding 800 MPa and uniform plastic deformation above 20% compared to as-cast alloy that fractures at strains below 8% at flow strength of approximately 200 MPa. The strengthening mechanisms of LRS morphologies are interpreted in terms of the interfacial constraints: increase in yield strength as well as strain hardening rate due to nanoscale confined slip in fibrous Al–Si eutectic, and load transfer and eventual plasticity in the nanoscale Si fibers.},
doi = {10.1080/21663831.2020.1755380},
journal = {Materials Research Letters},
number = 8,
volume = 8,
place = {United States},
year = {Tue Apr 28 00:00:00 EDT 2020},
month = {Tue Apr 28 00:00:00 EDT 2020}
}
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