Omega-like diffuse X-ray scattering in Ti–V caused by static lattice distortions
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- 作者：I.B. Ramsteiner ; O. Shchyglo ; M. Mezger ; A. Udyansky ; V. Bugaev ; S. Schö ; der ; H. Reichert ; H. Dosch
- 关键词：X-ray diffraction (XRD) ; Titanium alloys ; Short-range ordering ; Lattice defects ; Omega phase
- 刊名：Acta Materialia
- 出版年：2008
- 出版时间：April 2008
- 年：2008
- 卷：56
- 期：6
- 页码：1298-1305
- 全文大小：664 K
文摘
The diffuse scattering of body-centered cubic β-Ti–V was measured using high-energy synchrotron X-rays and two-dimensional detectors. The study included in situ experiments of the equilibrium β-phase and room temperature measurements of the quenched metastable state. The kinematical X-ray scattering revealed details in reciprocal space that could not be detected by the electron diffraction employed in previous studies. The signal was analyzed using a statistical thermodynamic approach based on physically motivated parameters. The characteristic features attributed to an ω-like structure or a “diffuse ω-phase” in the past are explained by static lattice distortions due to atomic size mismatch.