Accession Number:

AD0652574

Title:

INSTABILITY OF TITANIUM AND TI/6AL/4V ALLOY AT ROOM TEMPERATURE

Descriptive Note:

Technical rept.

Corporate Author:

COLUMBIA UNIV NEW YORK DEPT OF CIVIL ENGINEERING AND ENGINEERING MECHANICS

Personal Author(s):

• Wood, W. A.

Report Date:

1967-04-01

Pagination or Media Count:

21.0

Abstract:

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.

Descriptors:

• *TITANIUM
• *TITANIUM ALLOYS
• CREEP
• LOADS(FORCES)
• STABILITY
• STRAIN(MECHANICS)
• STRESSES
• TORSION

Subject Categories:

• Metallurgy and Metallography
• Mechanics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE