Cascade collapse of heavy-ion irradiated Cu-Ni alloys

Technical Report · Fri Jan 01 04:00:00 EST 1988

OSTI ID:6670669

Smalinskas, K S

To evaluate the role of material properties on the probability of a displacement cascade collapsing to a vacancy dislocation loop, the alloy content in Cu-Ni has been varied over the complete composition range. Cu-90wt%Ni, Cu-80wt%Ni, Cu-60wt%Ni, Cu-40wt%Ni, Cu-20wt%Ni, and Cu-10wt%Ni were used in this investigation. The probability of vacancy loop formation in Cu-Ni alloys has been shown to vary with the concentration of Ni. Initially, the inclusion of Ni increases the defect yield but on further addition, the yield decreases to a value lower than that of Cu. The yield starts to decrease when the Ni content exceeds 40%. The maximum and average dislocation loop size also decreases with increasing Ni content. Thus the number of vacancies retained in loops is significantly lower in the high nickel alloys than in pure Cu; a ratio of 13:1 was obtained. There is good agreement between the yields and size distributions in the current data with those reported by Stathopoulos et al. The diverse effects that the addition of impurities have on the probability of forming a dislocation loop from a displacement cascade and the lack of sufficient systematic studies makes it impossible to determine the precise effect. It is likely that more than one mechanism is operative. 31 refs., 14 figs., 3 tabs.

• Research Organization: Illinois Univ., Urbana (USA)
• DOE Contract Number: AC02-76ER01198
• OSTI ID: 6670669
• Report Number(s): DOE/ER/01198-T33; ON: DE89002722
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360102 -- Metals & Alloys-- Structure & Phase Studies
360103 -- Metals & Alloys-- Mechanical Properties
360106* -- Metals & Alloys-- Radiation Effects
ALLOYS
CHARGED PARTICLES
COPPER ALLOYS
COPPER BASE ALLOYS
CRYSTAL DEFECTS
CRYSTAL STRUCTURE
IONS
KRYPTON IONS
MELTING POINTS
METALLURGICAL EFFECTS
MICROSTRUCTURE
NICKEL ALLOYS
NICKEL BASE ALLOYS
PHYSICAL PROPERTIES
POINT DEFECTS
RADIATION EFFECTS
TEMPERATURE EFFECTS
THERMODYNAMIC PROPERTIES
TRANSITION TEMPERATURE
VACANCIES