SYMPOSIA PAPER Published: 01 January 1990

Microhardness—Microstructure Study of Aged Nimonic 90 Irradiated with Helium


Changes in the microhardness of an aged Nimonic 90 containing γ′-precipitates are monitored as a function of dose after 50 keV helium ion irradiation at room temperature in the dose range from 3 × 1020 to 3 × 1022 helium ions/m2. The microhardness showed an oscillatory behaviour. Transmission and scanning electron microscopy studies were performed to investigate the microstructural changes and surface modifications due to irradiation. An attempt is made to correlate the variations in the microhardness with the microstructural changes and surface damage caused by irradiation.

Author Information

Varatharajan, K
Indira Gandhi Centre for Atomic Research, Kalpakkam, India
Nandedkar, RV
Centre for Advanced Technology, Rajendranagar, Indane, India
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Developed by Committee: E10
Pages: 263–270
DOI: 10.1520/STP24645S
ISBN-EB: 978-0-8031-5112-3
ISBN-13: 978-0-8031-1266-7