Predicting the orientation-dependent stress-induced transformation and detwinning response of shape memory alloy single crystals

Journal Article · Thu Feb 01 04:00:00 EST 1996 · Metallurgical Transactions, A

DOI:https://doi.org/10.1007/BF02648405· OSTI ID:207678

Buchheit, T E; Wert, J A ^[1]

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1. Univ. of Virginia, Charlottesville, VA (United States). Dept. of Materials Science and Engineering

The present investigation examines three models that predict the orientation dependence of the stress-induced transformation strain in shape memory alloys (SMAs). The merits of each model are considered in light of experimental results for three SMAs: NiTi, Cu-Ni-Al, and Ni-Al. Published experimental results fit model predictions well in most cases; the few exceptions can be accounted for by factors not included in the present models. As part of the comparison of model results with experimental observations, Ni-Al stress-strain curves generated by one of the models are found to closely match experimental stress-strain curves for the [001], [011], and [111] stress axis orientations. Finally, the predicted transformation stress anisotropy is analyzed in detail to examine the effect of detwinning of the stress-induced martensite.

• Sponsoring Organization: USDOE
• OSTI ID: 207678
• Journal Information: Metallurgical Transactions, A, Journal Name: Metallurgical Transactions, A Journal Issue: 2 Vol. 27; ISSN 0360-2133; ISSN MTTABN
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
ALUMINIUM ALLOYS
AUSTENITE
COPPER ALLOYS
MARTENSITE
MATHEMATICAL MODELS
NICKEL ALLOYS
PHASE TRANSFORMATIONS
PREDICTION EQUATIONS
SHAPE MEMORY EFFECT
STRAINS
STRESSES
TITANIUM ALLOYS
TWINNING