Effect of disorder on the martensitic phase transformation in Nb/sub 3/Sn

Journal Article · Mon Aug 01 04:00:00 EDT 1983 · Appl. Phys. Lett.; (United States)

DOI:https://doi.org/10.1063/1.94296· OSTI ID:5993983

Snead, Jr, C L; Kumakura, H; Suenaga, M

Specimens of Nb/sub 3/Sn tape have been irradiated at approx.380 K with reactor-spectrum neutrons to fluences of 1.3 x 10/sup 19/ n/cm/sup 2/ (E>1 MeV) and the internal friction and dynamic Young's modulus measured from 6 to 300 K. The softening of the lattice with decreasing temperature is seen to decrease from 40% of the room-temperature value at 10 K for unirradiated Nb/sub 3/Sn to 94% at a fluence of 1.3 x 10/sup 19/ n/cm/sup 2/. The internal friction delta due to tetragonal domain-wall motion of the transformed material decreased with increasing fluence, being completely suppressed after approx.4 x 10/sup 18/ n/cm/sup 2/. The transformation temperature T/sub m/ decreased from approx.49 K for the virgin specimen to 22 K for a fluence of 3.8 x 10/sup 18/ n/cm/sup 2/ with no evidence of any tetragonal transformation at all for higher fluences. The lattice-dynamical and electronic changes responsible for these effects are not known at this time, but are seen to be correlated with the neutron-induced disorder.

• Research Organization: Metallurgy and Materials Science Division, Brookhaven National Laboratory, Upton, New York 11973
• DOE Contract Number: AC02-76CH00016
• OSTI ID: 5993983
• Journal Information: Appl. Phys. Lett.; (United States), Journal Name: Appl. Phys. Lett.; (United States) Vol. 43:3; ISSN APPLA
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360102 -- Metals & Alloys-- Structure & Phase Studies
360104 -- Metals & Alloys-- Physical Properties
360106* -- Metals & Alloys-- Radiation Effects
ALLOYS
BARYONS
CRYSTAL-PHASE TRANSFORMATIONS
ELASTICITY
ELEMENTARY PARTICLES
FERMIONS
FRICTION
HADRONS
INTERNAL FRICTION
LOW TEMPERATURE
MECHANICAL PROPERTIES
MEDIUM TEMPERATURE
NEUTRONS
NIOBIUM ALLOYS
NUCLEONS
PHASE TRANSFORMATIONS
PHONONS
PHYSICAL RADIATION EFFECTS
QUASI PARTICLES
RADIATION EFFECTS
SUPERCONDUCTORS
TENSILE PROPERTIES
TIN ALLOYS
ULTRALOW TEMPERATURE
VERY LOW TEMPERATURE