INFLUENCE OF MARTENSITE MORPHOLOGY AND CRYSTAL STRUCTURE ON THE PSEUDOELASTICITY IN A Cu-Al-Zn-Mn-Ni ALLOY

The deformation behaviour of parent phase and the pseudo-elasticity were studied, and the variation of microstructure with aging and deforming was analyzed using optical microscopy and X-ray diffraction. The experimental results showed that the pseudoelasticity in parent phase state is closely related to the original martensite microstructures. The pscudoelasticity of the alloy can be considerably improved with the perfection of martensitic self-accommodation and proper ageing treatment.