Effect of different annealing on the anelastic relaxation in Ti–13Nb–13Zr alloy

✍ Scribed by O. Florêncio; P.S. Silva Jr.; R. Ribeiro; J.M. Chaves; F.H. Sá; F.X. Melo; S.G. Schneider

• Publisher: Elsevier Science
• Year: 2009
• Tongue: English
• Weight: 277 KB
• Volume: 521-522
• Category: Article
• ISSN: 0921-5093
• DOI: 10.1016/j.msea.2008.09.136

✦ Synopsis

Measurements of anelastic relaxation (internal friction and frequency) as a function of temperature were carried out in Ti-13Nb-13Zr samples using Flexural Vibration of the first tone of samples in an Acoustic Elastometer System (Vibran Technology ® ) operating in the kHz bandwidth. The samples were analyzed under two different conditions: (a) heat treated at 1170 K for 30 min and water-quenched (␤-solution treated, ␤-ST WQ) and (b) this alloy ␤-ST WQ was submitted to one subsequent aging for 3 h at 670 K (␤-ST WQ + 670 K/3 h). Experimental spectra of anelastic relaxation were determined in the temperature range from 300 K to 500 K for a heating rate of 1 K/min under a pressure of 10 -5 Torr. The results show a relaxation structure strongly dependent on the microstructure of the material. The dynamic elastic modulus (E) of Ti-13Nb-13Zr alloy can be determined by flexural vibrations through frequency (f) measurements (f ∝ E 1/2 ). The anelastic relaxation spectrum of Ti-13Nb-13Zr alloy as a function of temperature obtained does not reveal the presence of interstitial solutes in solid solution, in the temperature range of measurements.