Local Stress Analysis in an SMA during Stress-Induced Martensitic Transformation by Kossel Microdiffraction

Abstract:

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The Kossel microdiffraction in a scanning electron microscope allows for local stress determination. This technique has been applied to monitor stress evolution within grains of austenite in the course of martensitic transformation in a shape memory alloy. Kossel diffraction patterns were recorded during in situ tensile straining of Cu-Al-Be alloy. These innovative measurements show large stress heterogeneities between grains, with the stress ratio exceeding two. As martensite variants are stress-induced, shear stress components appear in individual grains of austenite.

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Edited by:

M. François, G. Montay, B. Panicaud, D. Retraint and E. Rouhaud

Pages:

45-51

DOI:

10.4028/www.scientific.net/AMR.996.45

Citation:

D. Bouscaud et al., "Local Stress Analysis in an SMA during Stress-Induced Martensitic Transformation by Kossel Microdiffraction", Advanced Materials Research, Vol. 996, pp. 45-51, 2014

Online since:

August 2014

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