INSTABILITY OF TITANIUM AND TI/6AL/4V ALLOY AT ROOM TEMPERATURE
COLUMBIA UNIV NEW YORK DEPT OF CIVIL ENGINEERING AND ENGINEERING MECHANICS
Pagination or Media Count:
Titanium and Ti6Al4V under torsion exhibit unusual instability which shows itself as a abnormally prolonged creep on yielding, b ineffective strain-hardening after yielding, and c deviations from elastic strain at loads above a limit of proportionality which is low compared with the bulk yield stress. As a result of this inherent instability it is possible to produce significant axial extensions under low tensile stresses combined with small-amplitude cyclic torsion and to reduce the nominal bulk yield stress in torsion to at least half its nominal value by suitable prior straining.
- Metallurgy and Metallography