ANOMALOUS X-RAY DIFFRACTION FROM Ω PARTICLES IN TI-15MO ALLOY

1 Šmilauerová Jana
Co-authors:
1 Harcuba Petr 1 Janeček Miloš 1 Holý Václav
Institution:
1 Faculty of Mathematics and Physics, Charles University, Prague, smilauerova@karlov.mff.cuni.cz
Conference:
27th International Conference on Metallurgy and Materials, Hotel Voronez I, Brno, Czech Republic, EU, May 23rd - 25th 2018
Proceedings:
Proceedings 27th International Conference on Metallurgy and Materials
Pages:
1321-1327
ISBN:
978-80-87294-84-0
ISSN:
2694-9296
Published:
24th October 2018
Proceedings of the conference were published in Web of Science and Scopus.
Metrics:
11 views / 4 downloads
Abstract

Anomalous X-ray diffraction measurements were performed on a metastable β titanium alloy (Ti-15 wt% Mo) containing thermodynamically metastable ω phase particles. The dependence of diffracted intensity on primary beam energy was measured for selected ω and β diffraction maxima for energies near the MoK absorption edge (20.0 keV). The main focus of the paper is the interpretation of diffuse scattering around the measured β peak. A simulation which qualitatively interprets the observed phenomenon is presented. The proposed model shows that elastic deformation of the β matrix results from both the difference in specific volumes of ω and β phases and a “cloud” of higher Mo content around each ω particle.

Keywords: Metastable β titanium alloys, phase transformations, ω phase, anomalous X-ray diffraction
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