Prediction of the Initial Crack Tip Microstructure in a Single Crystal of CuAlNi

Galyna M. Vasko; Perry H. Leo; Thomas W Shield

doi:10.1115/IMECE1999-0934

Prediction of the Initial Crack Tip Microstructure in a Single Crystal of CuAlNi

Galyna M. Vasko, Perry H. Leo, Thomas W Shield

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

Abstract

The austenite to martensite pseudoelastic transformation induced by the anisotropic elastic crack tip stress field in a single crystal of shape memory alloy is considered. It is proposed that the orientation of the initial austenite-martensite interface that forms can be predicted based on knowledge of the stress field, the crystallography of the transformation and one of two selection criteria. These criteria are based on the work of formation of the mtirtensite in stress field and the crack opening displacement the martensite causes at the crack. Predictions of the criteria are compared to experiments on three single edge notched CuAlNi single crystal specimens. Results indicate that the maximum work criterion accurately predicts the orientation of the austenite-martensite interfaces that initially form near a crack.

Original language	English (US)
Title of host publication	Finite Thermoelasticity
Publisher	American Society of Mechanical Engineers (ASME)
Pages	29-43
Number of pages	15
ISBN (Electronic)	9780791816547
DOIs	https://doi.org/10.1115/IMECE1999-0934
State	Published - 1999
Externally published	Yes
Event	ASME 1999 International Mechanical Engineering Congress and Exposition, IMECE 1999 - Nashville, United States Duration: Nov 14 1999 → Nov 19 1999

Publication series

Name	ASME International Mechanical Engineering Congress and Exposition, Proceedings (IMECE)
Volume	1999-L

Conference

Conference	ASME 1999 International Mechanical Engineering Congress and Exposition, IMECE 1999
Country/Territory	United States
City	Nashville
Period	11/14/99 → 11/19/99

Bibliographical note

Publisher Copyright:
© 1999 American Society of Mechanical Engineers (ASME). All rights reserved.

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Prediction of the Initial Crack Tip Microstructure in a Single Crystal of CuAlNi. / Vasko, Galyna M.; Leo, Perry H.; Shield, Thomas W.
Finite Thermoelasticity. American Society of Mechanical Engineers (ASME), 1999. p. 29-43 (ASME International Mechanical Engineering Congress and Exposition, Proceedings (IMECE); Vol. 1999-L).

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

Vasko, GM, Leo, PH & Shield, TW 1999, Prediction of the Initial Crack Tip Microstructure in a Single Crystal of CuAlNi. in Finite Thermoelasticity. ASME International Mechanical Engineering Congress and Exposition, Proceedings (IMECE), vol. 1999-L, American Society of Mechanical Engineers (ASME), pp. 29-43, ASME 1999 International Mechanical Engineering Congress and Exposition, IMECE 1999, Nashville, United States, 11/14/99. https://doi.org/10.1115/IMECE1999-0934

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AB - The austenite to martensite pseudoelastic transformation induced by the anisotropic elastic crack tip stress field in a single crystal of shape memory alloy is considered. It is proposed that the orientation of the initial austenite-martensite interface that forms can be predicted based on knowledge of the stress field, the crystallography of the transformation and one of two selection criteria. These criteria are based on the work of formation of the mtirtensite in stress field and the crack opening displacement the martensite causes at the crack. Predictions of the criteria are compared to experiments on three single edge notched CuAlNi single crystal specimens. Results indicate that the maximum work criterion accurately predicts the orientation of the austenite-martensite interfaces that initially form near a crack.

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Prediction of the Initial Crack Tip Microstructure in a Single Crystal of CuAlNi

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