Mechanical property changes in ion-irradiated metals. Part 1; Ni-Cu alloys

Journal Article · Fri Dec 01 04:00:00 EST 1989 · Metallurgical Transactions, A (Physical Metallurgy and Materials Science); (USA)

DOI:https://doi.org/10.1007/BF02670161· OSTI ID:6617655

Plantz, D H; Wang, L M; Dodd, R A; Kulcinski, G L ^[1]

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1. Wisconsin Univ., Madison, WI (USA). Dept. of Nuclear Engineering and Engineering Physics

The effect of radiation-induced dislocation loops on hardness inion-irradiated Ni-Cu alloys has been studied using a recently developed mechanical properties microprobe (MPM). Well-annealed Ni-10 at. pct Cu and Ni-50 at. pct Cu were irradiated with 14-MeV Ni ions to doses of 20 to 100 displacements per atom (dpa) peak damage (5 to 25 dpa at 1 {mu}m) at 0.45 {ital T{sub m}} (485{degrees} C and 425{degrees} C, respectively). Ultra-low load microindentation hardness measurements and transmission electron microscopy (TEM) were done using cross-sectional techniques. These methods allow for direct hardness measurements, which have been compared to the unirradiated material, of only the small irradiation zone (< 3-{mu}m deep). Irradiation induced a high density of dislocation loops, with the size and density of the loops dependent on composition and independent of irradiation conditions. This high dislocation loop density caused a large increase in hardness. A reasonable correlation was found between measured hardness changes and calculated changes based on dislocation loop sizes and densities.

• OSTI ID: 6617655
• Journal Information: Metallurgical Transactions, A (Physical Metallurgy and Materials Science); (USA), Journal Name: Metallurgical Transactions, A (Physical Metallurgy and Materials Science); (USA) Vol. 20:12; ISSN MTTAB; ISSN 0360-2133
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360102 -- Metals &amp; Alloys-- Structure &amp; Phase Studies
360103 -- Metals &amp; Alloys-- Mechanical Properties
360106* -- Metals &amp; Alloys-- Radiation Effects
656002 -- Condensed Matter Physics-- General Techniques in Condensed Matter-- (1987-)
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ALLOYS
ANNEALING
CHEMICAL COMPOSITION
COPPER ALLOYS
CROSS SECTIONS
DENSITY
DISLOCATION PINNING
ELECTRON MICROSCOPY
HARDNESS
HEAT TREATMENTS
ION IMPLANTATION
IRRADIATION
MEASURING METHODS
MECHANICAL PROPERTIES
MICROSCOPY
NICKEL ALLOYS
PHYSICAL PROPERTIES
PHYSICAL RADIATION EFFECTS
RADIATION EFFECTS
TRANSMISSION ELECTRON MICROSCOPY