Hardening and the shape-memory effect in Ni-Ti alloys
- 24 Downloads
The change in the microhardness and deflection during heating of quenched Ni−Ti alloys is due to formation of x phase and the initial stages of recrystallization.
The optimal heat treatment to obtain the highest hardness and deflection of Ni−Ti alloys with a composition close to equiatomic is water quenching from 1000° (15–20 min) and annealing at 450° for 30–60 min.
KeywordsHeat Treatment Recrystallization High Hardness Optimal Heat Optimal Heat Treatment
Unable to display preview. Download preview PDF.
- 1.W. Buehler and R. Wiley, Trans. ASM, No. 1, 269 (1962).Google Scholar
- 2.T. Suzuki, Trans. JIM, No. 14, 31 (1973).Google Scholar
- 3.V. Kolomytsev, V. Lobodyuk, and L. Khandros, Phys. Status Solidi,50, 127 (1978a).Google Scholar
- 4.D. Koskimaki, M. Marcincowski, and A. Sastri, Trans. AIME, No. 9, 1863 (1969).Google Scholar
- 5.I. A. Arbuzova et al., "Deformation and recovery of shape during the martensitic transformation in a Cu−Sn alloy," Fiz. Met. Metalloved.,35, No. 6, 1278 (1973).Google Scholar
- 6.Yu. N. Koval' et al., "Effect of TMT on the shape-memory effect in Ti−Ni alloys," in: Martensitic Transformations in Metals and Alloys (ICOMAT-77) [in Russian], Naukova Dumka, Kiev (1979), p. 145.Google Scholar
- 7.V. I. Kolomytsev, V. A. Lobodyuk, and L. G. Khandros, "Electron-microscopic study of phase and structural changes that occur in Ti−Ni alloys during heating," in: Reports of the Second Republican Scientific—Technical Conference on Use of Electron Microscopy in Material Science, Biology, and Medicine [in Russian], Kiev (1979), p. 54.Google Scholar