An In Situ Study of the Martensitic Transformation in Shape Memory Alloys Using Photoemission Electron Microscopy

Journal Article · Sun Apr 15 00:00:00 EDT 2007 · Journal of Nuclear Materials, 361(2-3):306-312

DOI:https://doi.org/10.1016/j.jnucmat.2006.12.008· OSTI ID:909666

Cai, Mingdong; Langford, Stephen C.; Dickinson, J. T.; Xiong, Gang; Droubay, Timothy C.; Joly, Alan G.; Beck, Kenneth M.; Hess, Wayne P.

Thermally-induced martensitic phase transformations in polycrystalline CuZnAl and thin-film NiTiCu shape memory alloys were probed using photoemission electron microscopy (PEEM). Ultra-violet photoelectron spectroscopy shows a reversible change in the apparent work function during transformation, presumably due to the contrasting surface electronic structures of the martensite and austenite phases. In situ PEEM images provide information on the spatial distribution of these phases and the evolution of the surface microstructure during transformation. PEEM offers considerable potential for improving our understanding of martensitic transformations in shape memory alloys in real time.

• Research Organization: Pacific Northwest National Lab. (PNNL), Richland, WA (United States). Environmental Molecular Sciences Lab. (EMSL)
• Sponsoring Organization: USDOE
• DOE Contract Number: AC05-76RL01830
• OSTI ID: 909666
• Report Number(s): PNNL-SA-49612; JNUMAM; 11102; 21613; KC0301020; TRN: US200723%%3
• Journal Information: Journal of Nuclear Materials, 361(2-3):306-312, Vol. 361, Issue 2-3; ISSN 0022-3115
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
SHAPE MEMORY EFFECT
MARTENSITE
MICROSTRUCTURE
PHASE TRANSFORMATIONS
COPPER ALLOYS
ZINC ALLOYS
ALUMINIUM ALLOYS
NICKEL ALLOYS
TITANIUM ALLOYS
WORK FUNCTIONS
AUSTENITE
ELECTRONIC STRUCTURE
Environmental Molecular Sciences Laboratory