Ti-Nb Alloy

Alloy name: Ti-Nb
Diagram No.: 932
Type of diagram: No data
Chemical composition in atomic %: See the text
Alloy group: Titanium-based alloys
Note: (a) Dependence of Ms temperature on the content of Nb (at. %) (Kim 2006) and (b) stress-strain curves under loading and unloading for Ti-(22-29) at.% Nb alloys (Kim 2004).
Fig. presents the Ms depending on the Nb content, it reveals that Ms decreases by 40K with a 1 at. % increase of Nb content for Ti-(20-28)Nb alloys (Kim 2006). In this section, all compositions are given in at. %. Additionally, Ms becomes lower than room temperature when the Nb content increases more than 25.5 at. %, this result is in accord with the mechanical behaviors shown in in Fig. (Kim 2004). For Ti-(22-25)Nb alloys subjected to solution treatment in Beta phase field, there is Alpha(ath) phase resulting to the shape memory effect. Whereas for Ti-(25.5-27)Nb alloys, the metastable Beta phase existing in the quenched state leads to superelasticity. Finally, the Ti-(28-29)Nb Beta stable alloys show neither shape memory effect nor superelastic behavior.
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