Stress-induced martensitic transformation in Cu–Al–Zn–Mn polycrystal investigated by two in-situ neutron diffraction techniques

• Published in: Materials science & engineering. A, Structural materials : properties, microstructure and processing Vol. 324; no. 1; pp. 225 - 234
• Main Authors: Šittner, P., Lukáš, P., Neov, D., Daymond, M.R., Novák, V., Swallowe, G.M.
• Format: Journal Article Conference Proceeding
• Language: English
• Published: Amsterdam Elsevier B.V 15.02.2002; Elsevier
• Subjects: Condensed matter: structure, mechanical and thermal properties; Cross-disciplinary physics: materials science; rheology; Cu–Al–Zn–Mn polycrystal; Elasticity, elastic constants; Exact sciences and technology; Martensitic transformations; Materials science; Mechanical and acoustical properties of condensed matter; Mechanical properties of solids; Neutron diffraction techniques; Phase diagrams and microstructures developed by solidification and solid-solid phase transformations; Physics; Stress-induced martensitic transformation; Neutron diffraction techniques; Stress-induced martensitic transformation; Cu–Al–Zn–Mn polycrystal; Quaternary alloys; Pseudoelasticity; Stress analysis; Neutron diffraction; Tensile tests; Martensitic transformations; Polycrystals; Time-of-flight method; Residual stresses; Experimental study; Shape memory effects; Zinc alloys; Shape memory alloy; Aluminium alloys; Internal stresses; Copper alloys; Manganese alloys; Transition element alloys
• ISSN: 0921-5093; 1873-4936
• DOI: 10.1016/S0921-5093(01)01316-8

In-situ neutron diffraction studies of internal strains, stresses and phase fractions in pseudoelastic Cu–Al–Zn–Mn shape memory alloy (SMA) evolving during two tensile load cycles at constant temperature are reported. The results are discussed with the aim of demonstrating the applicability of this experimental technique for the SMA research. Particularly, an experimental information on the mechanisms by which individual grains of the transforming polycrystal share the macroscopic stress – load partition – as well as quantitative information on the residual stress frozen in the austenite phase after the first cycle are discussed.