Author/Authors :
Cai، نويسنده , , M. and Langford، نويسنده , , S.C. and Dickinson، نويسنده , , J.T. and Xiong، نويسنده , , Gang and Droubay، نويسنده , , T.C. and Joly، نويسنده , , A.G. and Beck، نويسنده , , K.M. and Hess، نويسنده , , W.P.، نويسنده ,
Abstract :
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.
