Superelasticity in Ti–10V–2Fe–3Al alloys with nitrogen addition

✍ Scribed by T. Furuhara; S. Annaka; Y. Tomio; T. Maki

• Publisher: Elsevier Science
• Year: 2006
• Tongue: English
• Weight: 526 KB
• Volume: 438-440
• Category: Article
• ISSN: 0921-5093
• DOI: 10.1016/j.msea.2006.02.084

✦ Synopsis

Metastable ␤ titanium alloy Ti-10V-2Fe-3Al is known to exhibit a shape memory effect due to a stress-induced ␣ martensitic transformation at room temperature. In the present study, nitrogen (N) was added to this alloy to strengthen the ␤ matrix. The effect on the deformation behavior of ␤ phase was studied. Thermally induced martensite is formed in the N-free alloy by quenching after ␤ solutionizing but it is not observed in the alloys containing nitrogen of more than 0.1 mass%. Superelasticity due to stress-induced formation of ␣ martensite was observed in the 0.1 and 0.2N alloys. N addition is moreover effective in increasing a true elastic strain up to 1% by strengthening of the ␤ matrix.