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Title: A Reactive Element Approach to Improve Fracture Healing in Metallic Systems

Abstract

Self-healing materials demonstrate the ability to close fractures and regain mechanical integrity after a catastrophic failure. However, self-healing in metals can be inhibited by the natural tendency for technologically-relevant metallic systems to oxidize on the crack surface. This study seeks to provide a thermodynamically-based mechanism to enhance healing capability at a solid/liquid interface through alloys designed with a reactive element alloying addition possessing a lower free energy of oxide formation than the parent element. In this study, model Sb-Cu and Sb-Zn systems enable comparisons between mechanistic behaviors based only on thermodynamic reactivity. Mechanical and microstructural investigation demonstrated that the more reactive alloying addition resulted in more effective bonding through increasing bond area and load-bearing capacity of the system. The improved bonding was attributed to improved wetting and reduction of the passivating surface oxide across an interface. The work has potential to advance self-healing capabilities in metallic systems through more appropriate alloy selection to enable improved healing.

Authors:
 [1];  [2]; ORCiD logo [3]; ORCiD logo [3];  [2]
  1. Naval Surface Warfare Center (NSWC), Washington Navy Yard, DC (United States)
  2. Univ. of Florida, Gainesville, FL (United States)
  3. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Publication Date:
Research Org.:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1607244
Grant/Contract Number:  
AC05-00OR22725
Resource Type:
Accepted Manuscript
Journal Name:
Frontiers in Materials
Additional Journal Information:
Journal Volume: 6; Journal Issue: n/a; Journal ID: ISSN 2296-8016
Publisher:
Frontiers Research Foundation
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; interfacial bonding; thermodynamic; chevron notch; liquid phase; self-healing

Citation Formats

Fisher, Charles Robert, Mecholsky, John J., Henderson, Hunter, Kesler, Michael, and Manuel, Michele V. A Reactive Element Approach to Improve Fracture Healing in Metallic Systems. United States: N. p., 2019. Web. https://doi.org/10.3389/fmats.2019.00210.
Fisher, Charles Robert, Mecholsky, John J., Henderson, Hunter, Kesler, Michael, & Manuel, Michele V. A Reactive Element Approach to Improve Fracture Healing in Metallic Systems. United States. https://doi.org/10.3389/fmats.2019.00210
Fisher, Charles Robert, Mecholsky, John J., Henderson, Hunter, Kesler, Michael, and Manuel, Michele V. Thu . "A Reactive Element Approach to Improve Fracture Healing in Metallic Systems". United States. https://doi.org/10.3389/fmats.2019.00210. https://www.osti.gov/servlets/purl/1607244.
@article{osti_1607244,
title = {A Reactive Element Approach to Improve Fracture Healing in Metallic Systems},
author = {Fisher, Charles Robert and Mecholsky, John J. and Henderson, Hunter and Kesler, Michael and Manuel, Michele V.},
abstractNote = {Self-healing materials demonstrate the ability to close fractures and regain mechanical integrity after a catastrophic failure. However, self-healing in metals can be inhibited by the natural tendency for technologically-relevant metallic systems to oxidize on the crack surface. This study seeks to provide a thermodynamically-based mechanism to enhance healing capability at a solid/liquid interface through alloys designed with a reactive element alloying addition possessing a lower free energy of oxide formation than the parent element. In this study, model Sb-Cu and Sb-Zn systems enable comparisons between mechanistic behaviors based only on thermodynamic reactivity. Mechanical and microstructural investigation demonstrated that the more reactive alloying addition resulted in more effective bonding through increasing bond area and load-bearing capacity of the system. The improved bonding was attributed to improved wetting and reduction of the passivating surface oxide across an interface. The work has potential to advance self-healing capabilities in metallic systems through more appropriate alloy selection to enable improved healing.},
doi = {10.3389/fmats.2019.00210},
journal = {Frontiers in Materials},
number = n/a,
volume = 6,
place = {United States},
year = {2019},
month = {8}
}

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