Repairing large cracks and reversing fatigue damage in structural metals

Charles R. Fisher; Hunter B. Henderson; Michael S. Kesler; Pingping Zhu; Glenn E. Bean; M. Clara Wright; John A. Newman; L. Catherine Brinson; Oscar Figueroa; Michele V. Manuel

doi:10.1016/j.apmt.2018.07.003

Repairing large cracks and reversing fatigue damage in structural metals

Charles R. Fisher, Hunter B. Henderson, Michael S. Kesler, Pingping Zhu, Glenn E. Bean, M. Clara Wright, John A. Newman, L. Catherine Brinson, Oscar Figueroa, Michele V. Manuel

Alloy Behavior & Design

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

28 Scopus citations

Abstract

Self-healing materials represent a paradigm shift from traditional materials development, enabling intrinsic repair of functionality (such as strength) after a catastrophic failure as opposed to part replacement. Several healing mechanisms have been demonstrated in polymeric and ceramic materials, but few in metallic systems. This study demonstrates a novel liquid-assisted self-healing metal-matrix composite (MMC) designed to be capable of over 90% strength recovery after a healing cycle. The aluminum (Al)-based matrix is reinforced with continuous nickel-titanium (NiTi) shape-memory alloy (SMA) reinforcements. Using a tailored heat treatment for healing, a paired effect of crack closure from the SMA reinforcement and partial liquefaction of the matrix occurs. These effects result in a compressive force across the crack surface, and, coupled with increased diffusion rates from the liquefied matrix, produces consolidation and healing in the composite structure. This work provides experimental and computational evidence for the healing mechanism under both tensile and fatigue conditions.

Original language	English
Pages (from-to)	64-68
Number of pages	5
Journal	Applied Materials Today
Volume	13
DOIs	https://doi.org/10.1016/j.apmt.2018.07.003
State	Published - Dec 2018

Funding

The authors would like to thank our funding partners at the Florida Space Grant Research program (NNX10AM01H), National Science Foundation ( CMMI-0824352 ) and the National Aeronautics and Space Administration ( NNX12AQ42G, NNX13AR53A , and NNX12AP71A ).

Funders	Funder number
National Science Foundation	CMMI-0824352
National Aeronautics and Space Administration	NNX12AP71A, NNX13AR53A, NNX12AQ42G

Keywords

Design
Metal-matrix composite
Self-healing
Shape-memory alloy
Thermodynamics

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10.1016/j.apmt.2018.07.003

Cite this

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title = "Repairing large cracks and reversing fatigue damage in structural metals",

abstract = "Self-healing materials represent a paradigm shift from traditional materials development, enabling intrinsic repair of functionality (such as strength) after a catastrophic failure as opposed to part replacement. Several healing mechanisms have been demonstrated in polymeric and ceramic materials, but few in metallic systems. This study demonstrates a novel liquid-assisted self-healing metal-matrix composite (MMC) designed to be capable of over 90% strength recovery after a healing cycle. The aluminum (Al)-based matrix is reinforced with continuous nickel-titanium (NiTi) shape-memory alloy (SMA) reinforcements. Using a tailored heat treatment for healing, a paired effect of crack closure from the SMA reinforcement and partial liquefaction of the matrix occurs. These effects result in a compressive force across the crack surface, and, coupled with increased diffusion rates from the liquefied matrix, produces consolidation and healing in the composite structure. This work provides experimental and computational evidence for the healing mechanism under both tensile and fatigue conditions.",

keywords = "Design, Metal-matrix composite, Self-healing, Shape-memory alloy, Thermodynamics",

author = "Fisher, {Charles R.} and Henderson, {Hunter B.} and Kesler, {Michael S.} and Pingping Zhu and Bean, {Glenn E.} and Wright, {M. Clara} and Newman, {John A.} and Brinson, {L. Catherine} and Oscar Figueroa and Manuel, {Michele V.}",

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AU - Fisher, Charles R.

AU - Henderson, Hunter B.

AU - Kesler, Michael S.

AU - Zhu, Pingping

AU - Bean, Glenn E.

AU - Wright, M. Clara

AU - Newman, John A.

AU - Brinson, L. Catherine

AU - Figueroa, Oscar

AU - Manuel, Michele V.

PY - 2018/12

Y1 - 2018/12

N2 - Self-healing materials represent a paradigm shift from traditional materials development, enabling intrinsic repair of functionality (such as strength) after a catastrophic failure as opposed to part replacement. Several healing mechanisms have been demonstrated in polymeric and ceramic materials, but few in metallic systems. This study demonstrates a novel liquid-assisted self-healing metal-matrix composite (MMC) designed to be capable of over 90% strength recovery after a healing cycle. The aluminum (Al)-based matrix is reinforced with continuous nickel-titanium (NiTi) shape-memory alloy (SMA) reinforcements. Using a tailored heat treatment for healing, a paired effect of crack closure from the SMA reinforcement and partial liquefaction of the matrix occurs. These effects result in a compressive force across the crack surface, and, coupled with increased diffusion rates from the liquefied matrix, produces consolidation and healing in the composite structure. This work provides experimental and computational evidence for the healing mechanism under both tensile and fatigue conditions.

AB - Self-healing materials represent a paradigm shift from traditional materials development, enabling intrinsic repair of functionality (such as strength) after a catastrophic failure as opposed to part replacement. Several healing mechanisms have been demonstrated in polymeric and ceramic materials, but few in metallic systems. This study demonstrates a novel liquid-assisted self-healing metal-matrix composite (MMC) designed to be capable of over 90% strength recovery after a healing cycle. The aluminum (Al)-based matrix is reinforced with continuous nickel-titanium (NiTi) shape-memory alloy (SMA) reinforcements. Using a tailored heat treatment for healing, a paired effect of crack closure from the SMA reinforcement and partial liquefaction of the matrix occurs. These effects result in a compressive force across the crack surface, and, coupled with increased diffusion rates from the liquefied matrix, produces consolidation and healing in the composite structure. This work provides experimental and computational evidence for the healing mechanism under both tensile and fatigue conditions.

KW - Design

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KW - Thermodynamics

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JO - Applied Materials Today

JF - Applied Materials Today

ER -

Repairing large cracks and reversing fatigue damage in structural metals

Abstract

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Keywords

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