Martensite variant localization effects on fatigue crack growth - The CuZnAl example

J. Yaacoub; Y. Wu; W. Abuzaid; D. Canadinc; H. Sehitoglu

doi:10.1016/j.scriptamat.2019.06.032

Martensite variant localization effects on fatigue crack growth - The CuZnAl example

J. Yaacoub
, Y. Wu
, W. Abuzaid
, D. Canadinc
, H. Sehitoglu

Mechanical Science and Engineering

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

Abstract

The paper underscores the difficulty in characterizing crack growth in shape memory alloys with conventional stress intensity approaches even when anisotropy is accounted for. The local displacements deviate significantly from the presumed K solutions because of transformation localization at macro scales extending from the crack tip. Modifications in stress intensity due to variant induced tractions are derived providing an explanation of the extrinsic behavior. Precise displacement and strain measurements are provided to highlight the complexity of deformation and the need for better fracture mechanics models, including crack tip opening displacements, to characterize fatigue crack growth in shape memory alloys.

Original language	English (US)
Pages (from-to)	112-117
Number of pages	6
Journal	Scripta Materialia
Volume	171
DOIs	https://doi.org/10.1016/j.scriptamat.2019.06.032
State	Published - Oct 2019

Keywords

Crack opening displacement
CuZnAl
Fatigue crack growth
Stress induced martensite
Superelasticity

ASJC Scopus subject areas

General Materials Science
Condensed Matter Physics
Mechanics of Materials
Mechanical Engineering
Metals and Alloys

Online availability

10.1016/j.scriptamat.2019.06.032

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Cite this

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title = "Martensite variant localization effects on fatigue crack growth - The CuZnAl example",

abstract = "The paper underscores the difficulty in characterizing crack growth in shape memory alloys with conventional stress intensity approaches even when anisotropy is accounted for. The local displacements deviate significantly from the presumed K solutions because of transformation localization at macro scales extending from the crack tip. Modifications in stress intensity due to variant induced tractions are derived providing an explanation of the extrinsic behavior. Precise displacement and strain measurements are provided to highlight the complexity of deformation and the need for better fracture mechanics models, including crack tip opening displacements, to characterize fatigue crack growth in shape memory alloys.",

keywords = "Crack opening displacement, CuZnAl, Fatigue crack growth, Stress induced martensite, Superelasticity",

author = "J. Yaacoub and Y. Wu and W. Abuzaid and D. Canadinc and H. Sehitoglu",

note = "This work is funded by the National Science Foundation DMR grant 1709515 Metallic Materials and Nanomaterials Program. The EBSD analyses were carried out in part in the Frederick Seitz Materials Research Laboratory Central Research Facilities, University of Illinois. The single crystals were grown by Prof. Yuriy Chumlyakov, Tomsk State University, Russia.",

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doi = "10.1016/j.scriptamat.2019.06.032",

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volume = "171",

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AU - Yaacoub, J.

AU - Wu, Y.

AU - Abuzaid, W.

AU - Canadinc, D.

AU - Sehitoglu, H.

N1 - This work is funded by the National Science Foundation DMR grant 1709515 Metallic Materials and Nanomaterials Program. The EBSD analyses were carried out in part in the Frederick Seitz Materials Research Laboratory Central Research Facilities, University of Illinois. The single crystals were grown by Prof. Yuriy Chumlyakov, Tomsk State University, Russia.

PY - 2019/10

Y1 - 2019/10

N2 - The paper underscores the difficulty in characterizing crack growth in shape memory alloys with conventional stress intensity approaches even when anisotropy is accounted for. The local displacements deviate significantly from the presumed K solutions because of transformation localization at macro scales extending from the crack tip. Modifications in stress intensity due to variant induced tractions are derived providing an explanation of the extrinsic behavior. Precise displacement and strain measurements are provided to highlight the complexity of deformation and the need for better fracture mechanics models, including crack tip opening displacements, to characterize fatigue crack growth in shape memory alloys.

AB - The paper underscores the difficulty in characterizing crack growth in shape memory alloys with conventional stress intensity approaches even when anisotropy is accounted for. The local displacements deviate significantly from the presumed K solutions because of transformation localization at macro scales extending from the crack tip. Modifications in stress intensity due to variant induced tractions are derived providing an explanation of the extrinsic behavior. Precise displacement and strain measurements are provided to highlight the complexity of deformation and the need for better fracture mechanics models, including crack tip opening displacements, to characterize fatigue crack growth in shape memory alloys.

KW - Crack opening displacement

KW - CuZnAl

KW - Fatigue crack growth

KW - Stress induced martensite

KW - Superelasticity

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ER -

Martensite variant localization effects on fatigue crack growth - The CuZnAl example

Abstract

Keywords

ASJC Scopus subject areas

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