Role of martensite transformation in variation of physicomechanical properties of Nb-Ti (45 and 50 wt% Nb) alloys at low temperatures
✍ Scribed by V.A. Lototskaya; Yu.A. Pokhil; F.F. Lavrentiev
- Publisher
- Elsevier Science
- Year
- 1993
- Tongue
- English
- Weight
- 272 KB
- Volume
- 33
- Category
- Article
- ISSN
- 0011-2275
No coin nor oath required. For personal study only.
✦ Synopsis
The structural state of Nb-Ti (45 and 50 wt% Nb) alloys after thermomechanical treatment (TMT), and the influence of TMT on their mechanical properties, plastic deformation characteristics and electrical resistance are studied in the temperature range 295-4.2 K.
It is shown that the direct and reversible/~ ~-e" transformation, which proceeds orientationally, leads to: 1, anomalous temperature dependences of the relative elongation, proportionality limits and yield strength of hardened and drawn samples at 160-77 K, the degree of anomaly being dependent on the TMT; 2, pseudo-elasticity in the stress -strain curves a(AI), the temperature range of the pseudo-elasticity being dependent on the TMT; and 3, non-monotonous behaviour in the strain dependences of electrical resistance p(AI) and stress a(A/) in all structural states.