X-ray study of martensitic transformation in titanium nickelide single crystal

✍ Scribed by V.I. Zel’dovich; V.M. Gundyrev

• Publisher: Elsevier Science
• Year: 2006
• Tongue: English
• Weight: 168 KB
• Volume: 438-440
• Category: Article
• ISSN: 0921-5093
• DOI: 10.1016/j.msea.2006.02.051

✦ Synopsis

The distribution of the orientations of the B19 -martensite crystals formed upon cooling in the single crystal B2-phase of the Ti-51 at.% Ni alloy has been studied. To this end, positions of the (0 0 2), (1,1,-1), (0 2 0), and (1 1 1) planes of the B19 -martensite, which "originated" from the (1 1 0) plane of the B2-phase, were determined. It was found that the results obtained could be described using the conventional monoclinic crystal structure of the B19 -martensite and the orientation relationships obtained earlier. However, a small deviation from the parallelism between the (0 2 0)B19 and (1 1 0)B2 planes is observed. Upon the transformation of the single crystal B2-phase into the B19 -martensite in cooling, no less than 12 crystallographically equivalent orientations of martensitic crystals are realized in the irradiated volume of 1.5 mm × 3 mm × 0.01 mm. The realization of various orientations of this martensite is equiprobable. The B19 -martensite has monoclinic angles from 90 • to 96.8 • .