Effects of Alloying Elements on the Oxygen Snoek-Type Relaxation in Ti-Nb Alloys

Abstract:

The effect of ternary alloying elements on the oxygen Snoek-type relaxation in the Ti-24Nb-2X-1.7O alloys (X = Al, Sn, Cr, Mn, Fe) was investigated. The dipole shape factor (δλ) of the Snoek-type relaxation was figured out for each ternary alloy based on the measured damping peak with the variable temperature. The value of δλ in the Ti-Nb-Al alloy was the highest among the present ternary alloys. It was found that δλ increased with the decreasing lattice constant as well as the decreasing valence electron number per atom (e/a) and came to a maximum value when the e/a value was around 4.24, which defined the β phase boundary. Therefore, decreasing the lattice constants and the e/a value as largely as possible with alloying elements in the β-Ti alloys is one of the feasible ways to increase δλ and to design the high damping Ti alloys.

• Periodical: Solid State Phenomena (Volume 184)
• Pages: 75-80
• DOI: https://doi.org/10.4028/www.scientific.net/SSP.184.75
• Online since: January 2012
• Authors: H. Lu, Chun Xia Li, Fu Xing Yin, Qian Feng Fang, Osamu Umezawa
• Keywords: Dipole Shape Factor, Snoek-Type Relaxation, Ti-Nb Alloy, Valence Electron Number per Atom

References

[1] M.S. Blanter, I.S. Golovin, H. Neuhäuser, H.R. Sinning, Internal friction in metallic materials-a handbook, Springer, Berlin Heidelberg, (2007).

DOI: 10.1007/978-3-540-68758-0

[2] H.R. Sinning, I. S. Golovin, A. Strahl, O.A. Sokolova, T. Sazonova, Interactions between solute atoms in Fe-Si-Al-C alloys as studied by mechanical spectroscopy, Mater. Sci. Eng. A 521-522 (2009) 63-66.

DOI: 10.1016/j.msea.2008.09.110

[3] F. Yin, L. Yu, D. Ping, S. Iwasaki, Anisotropy of Snoek relaxation in a highly textured Ti-Nb-O b-Ti alloy, J. Appl. Phys. 104 (2008) 113507 1-8.

DOI: 10.1063/1.3021314

[4] F. Yin, L. Yu, D. Ping, Modeling and control of the high damping behavior in Ti-Nb-O alloys, Mater. Sci. Eng. A 521-522 (2009) 372-375.

DOI: 10.1016/j.msea.2008.09.090

[5] T. Saito et al., Multifunctional alloys obtained via a dislocation-free plastic deformation mechanism, Science 300 (2003) 464-467.

[6] E.S. Fisher, D. Dever, Relation of the c' elastic modulus to stability of b. c. c. transition metals, Acta Metall. 18 (1970) 265-269.

DOI: 10.1016/0001-6160(70)90033-7

[7] H. Ikehata, N. Nagasako, T. Furuta, A. Fukumoto, K. Miwa, T. Saito, First-principles calculations for development of low elastic modulus Ti alloys, Phys. Rev. B 70 (2004) 174113 1-8.

DOI: 10.1103/physrevb.70.174113

[8] A.V. Dobromyslov, V.A. Elkin, Martensitic transformation and metastable β-phase in binary titanium alloys with d-metals of 4–6 periods, Scripta Mater. 44 (2001) 905-910.

DOI: 10.1016/s1359-6462(00)00694-1

[9] F. Yin, S. Iwasaki, D. Ping, K. Nagai, Snoek-type high-damping alloys realized in β-Ti alloys with high oxygen solid solution, Adv. Mater. 18 (2006) 1541-1544.

DOI: 10.1002/adma.200600128

[10] M. Weller, Point defect relaxations, in: R. Schaller, G. Fantozzi, G. Gremaud (Eds. ), Mechanical Spectroscopy Q-1 2001, Trans Tech Publications, Switzerland, 2001, pp.95-140.

[11] A.S. Nowick, B.S. Berry, Anelastic relaxation in crystalline solids, Academic Press, New York, (1972).

[12] C. Kittel, Introduction to solid state physics, second ed., Wiley, New York, (1956).