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Local stress analysis in an SMA during stress-induced martensitic transformation by Kossel microdiffraction

Communication avec acte
Author
BOUSCAUD, Denis
178323 Laboratoire d'Etude des Microstructures et de Mécanique des Matériaux [LEM3]
BERVEILLER, Sophie
178323 Laboratoire d'Etude des Microstructures et de Mécanique des Matériaux [LEM3]
PESCI, Raphaël
178323 Laboratoire d'Etude des Microstructures et de Mécanique des Matériaux [LEM3]
PATOOR, Etienne
178323 Laboratoire d'Etude des Microstructures et de Mécanique des Matériaux [LEM3]
MORAWIEC, Adam
229996 Institute of Metallurgy and Materials Science

URI
http://hdl.handle.net/10985/9942
DOI
10.4028/www.scientific.net/AMR.996.45
Date
2014

Abstract

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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