Effects of ternary additions on Young's modulus and the martensitic transformation of Nb/sub 3/Sn

Conference · Fri Jan 01 04:00:00 EST 1982 · Adv. Cryog. Eng.; (United States)

OSTI ID:6209987

Bussiere, J F; Faucher, B; Snead, Jr, C L; Suenaga, M

Recent measurements on bronze-processed Nb/sub 3/Sn using a vibrating reed technique have shown that Young's modulus at low temperatures decreases to 0.4 of its room temperature value, and that the internal friction increases dramatically below 50 K, the martensitic transformation temperature. In this study, this technique was used to study softening and the occurrence of the martensitic transformation in bronze-processed Nb/sub 3/Sn samples which contained additions of Ta, Ti, and Zr. Sample preparations and characteristics of the compositions are given. Internal friction and dynamic Young's modulus were measured using electronics based on a phase-locked loop and frequency mode developed by Simpson and Sosin. Softening of Young's modulus and occurrence of the martensitic transformation were found to be strongly affected by the presence of relatively small amounts (0-4 at .%) of Ta, Ti, or Zr. Additions incorporating 2 at .% Ti in the Nb/sub 3/Sn increased Young's modulus by a factor of 2 at 10 K and also suppressed the transformation.

• Research Organization: Institut de Genie des Materiaux, CNRC, Montreal, Quebec
• OSTI ID: 6209987
• Report Number(s): CONF-810835-
• Conference Information: Journal Name: Adv. Cryog. Eng.; (United States) Journal Volume: 28
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360102* -- Metals & Alloys-- Structure & Phase Studies
ALLOY SYSTEMS
ALLOYS
BRONZE
CARBON ADDITIONS
COPPER ALLOYS
COPPER BASE ALLOYS
CRYOGENICS
FRICTION
INTERNAL FRICTION
IRON ALLOYS
LOW TEMPERATURE
MARTENSITE
MECHANICAL PROPERTIES
METALLURGICAL EFFECTS
NIOBIUM ALLOYS
PHASE TRANSFORMATIONS
SUPERCONDUCTORS
TANTALUM ADDITIONS
TANTALUM ALLOYS
TERNARY ALLOY SYSTEMS
TIN ALLOYS
TITANIUM ADDITIONS
TITANIUM ALLOYS
YOUNG MODULUS
ZIRCONIUM ADDITIONS
ZIRCONIUM ALLOYS