Modeling the stress-induced transformation behavior of shape memory alloy single crystals

Journal Article · Wed Nov 01 04:00:00 EST 1995 · Acta Metallurgica et Materialia

DOI:https://doi.org/10.1016/0956-7151(95)00105-5· OSTI ID:131511

Buchheit, T E; Kumpf, S L; Wert, J A ^[1]

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

The phenomenological theory of martensite crystallography has been used to determine habit plane/shear direction combinations for stress-induced transformation of NiTi, Cu-Ni-Al and NiAl shape memory alloys (SMA) to twin-related martensite correspondence variant pairs. By considering the habit plane/shear direction combinations as unidirectional shear systems, generalized Schmid`s law is then used to predict the mechanical response of unconstrained single crystals of each SMA. Model results include axial transformation strain, and plane stress transformation surfaces as a function of crystal orientation. Comparison of the predicted mechanical response results with the habit plane/shear direction combinations reveals a link between the anisotropy and asymmetry of the mechanical response of SMA single crystals, and the crystallography of the martensitic transformation.

• OSTI ID: 131511
• Journal Information: Acta Metallurgica et Materialia, Journal Name: Acta Metallurgica et Materialia Journal Issue: 11 Vol. 43; ISSN 0956-7151; ISSN AMATEB
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
ALUMINIUM ALLOYS
ANISOTROPY
COPPER ALLOYS
CRYSTAL-PHASE TRANSFORMATIONS
CRYSTALLOGRAPHY
HABIT PLANES
INTERMETALLIC COMPOUNDS
MARTENSITE
MATHEMATICAL MODELS
NICKEL ALLOYS
ORIENTATION
SHEAR
STRAINS
STRESSES
TITANIUM ALLOYS