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Title: Stabilizing the body centered cubic crystal in titanium alloys by a nano-scale concentration modulation

Authors:
; ; ; ; ; ; ; ; ; ;
Publication Date:
Sponsoring Org.:
USDOE
OSTI Identifier:
1397629
Grant/Contract Number:
AC02-06CH11357
Resource Type:
Journal Article: Publisher's Accepted Manuscript
Journal Name:
Journal of Alloys and Compounds
Additional Journal Information:
Journal Volume: 700; Journal Issue: C; Related Information: CHORUS Timestamp: 2017-10-04 21:34:03; Journal ID: ISSN 0925-8388
Publisher:
Elsevier
Country of Publication:
Netherlands
Language:
English

Citation Formats

Wang, H. L., Shah, S. A. A., Hao, Y. L., Prima, F., Li, T., Cairney, J. M., Wang, Y. D., Wang, Y., Obbard, E. G., Li, S. J., and Yang, R. Stabilizing the body centered cubic crystal in titanium alloys by a nano-scale concentration modulation. Netherlands: N. p., 2017. Web. doi:10.1016/j.jallcom.2016.12.406.
Wang, H. L., Shah, S. A. A., Hao, Y. L., Prima, F., Li, T., Cairney, J. M., Wang, Y. D., Wang, Y., Obbard, E. G., Li, S. J., & Yang, R. Stabilizing the body centered cubic crystal in titanium alloys by a nano-scale concentration modulation. Netherlands. doi:10.1016/j.jallcom.2016.12.406.
Wang, H. L., Shah, S. A. A., Hao, Y. L., Prima, F., Li, T., Cairney, J. M., Wang, Y. D., Wang, Y., Obbard, E. G., Li, S. J., and Yang, R. Sat . "Stabilizing the body centered cubic crystal in titanium alloys by a nano-scale concentration modulation". Netherlands. doi:10.1016/j.jallcom.2016.12.406.
@article{osti_1397629,
title = {Stabilizing the body centered cubic crystal in titanium alloys by a nano-scale concentration modulation},
author = {Wang, H. L. and Shah, S. A. A. and Hao, Y. L. and Prima, F. and Li, T. and Cairney, J. M. and Wang, Y. D. and Wang, Y. and Obbard, E. G. and Li, S. J. and Yang, R.},
abstractNote = {},
doi = {10.1016/j.jallcom.2016.12.406},
journal = {Journal of Alloys and Compounds},
number = C,
volume = 700,
place = {Netherlands},
year = {Sat Apr 01 00:00:00 EDT 2017},
month = {Sat Apr 01 00:00:00 EDT 2017}
}

Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record at 10.1016/j.jallcom.2016.12.406

Citation Metrics:
Cited by: 3works
Citation information provided by
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  • It is well-known that the body centered cubic (bcc) crystal in titanium alloys reaches its stability limit as the electron-to-atom (e/a) ratio of the alloy drops down to ~4.24. This critical value, however, is much higher than that of a multifunctional bcc type alloy (e/a = 4.15). Here we demonstrate that a nano-scale concentration modulation created by spinodal decomposition is what stabilizes the bcc crystal of the alloy. Aided by such a nano-scale concentration heterogeneity, unexpected properties from its chemically homogeneous counterpart are obtained. This provides a new strategy to design functional titanium alloys by tuning the spinodal decomposition.
  • Interdiffusion has been studied between 1000 and 2000/sup 0/C. The concentration dependence of the interdiffusion coefficients is small. With temperature, they show an anomalous behaviour characteristic of diffusion in b.c.c. metals and alloys. The high temperature activation energy (175 kJ/mol) is greater than the low temperature one near the BETA ..-->.. ..cap alpha.. transformation (120 kJ/mol). Diffusion coefficients at infinite dilution and the influence of zirconium impurities are specified. No Kirkendall effect was seen in these alloys.
  • A calculation was carried out of the eigenvalues of the dynamic matrix for a Ti-40 at. % Nb alloy in a harmonic approximation by use of the elastic moduli measured for this alloy. The distribution of the minimum eigenvalues of the dynamical matrix was compared with the electron diffraction picture for that alloy. Results show that for a Ti-40 at. % Nb alloy, a distribution of the minimum eigenvalues of the dynamic matrix is found in the (110) plane of the reciprocal lattice, which agrees with the experimentally observed picture of diffuse electron scattering. Consequently, the directions and regions ofmore » instability of a crystal lattice can be determined by means of calculations in the body-centered cubic structures of titanium alloys.« less