Neutron diffraction phase analysis during thermal cycling of a Ni-rich NiTi shape memory alloy using the Rietveld method

Sitepu, H.; Schmahl, Wolfgang W.; Khalil-Allafi, Jafar; Eggeler, Gunther; Dlouhy, A.; Többens, D. M. and Tovar, M. (2002): Neutron diffraction phase analysis during thermal cycling of a Ni-rich NiTi shape memory alloy using the Rietveld method. In: Scripta Materialia, Vol. 46, No. 7: pp. 543-548

Abstract

Martensitic transformations in an aged Ni-rich NiTi shape memory alloy are analysed using neutron diffraction and electron microscopy. The material shows a two step transformation on cooling from B2. After the first release of latent heat on cooling two martensitic phases (R-phase and B19(′)) are present. This is due to a heterogeneous microstructure after solution annealing and ageing.

• Item Type: Journal article
• Faculties: Geosciences > Department of Earth and Environmental Sciences > Crystallography and Materials Science
• Subjects: 500 Science > 550 Earth sciences and geology
• Language: English