Effects of High Thermal Neutron Fluences on Type 6061 Aluminum

JR Weeks; CJ Czajkowski; K Farrell

doi:10.1520/STP23996S

SYMPOSIA PAPER Published: 01 January 1994

STP23996S

Effects of High Thermal Neutron Fluences on Type 6061 Aluminum

Source

The control rod drive follower tubes of the High Flux Beam Reactor are constructed from precipitation-hardened 6061-T6 aluminum alloy and they operate in the high thermal neutron flux regions of the core. It is shown that large thermal neutron fluences up to -4 x 10²³ n/cm² at 333K cause large increases in tensile strength and relatively modest decreases in tensile elongation while significantly reducing the notch impact toughness at room temperature. These changes are attributed to the development of a fine distribution of precipitates of amorphous silicon of which about 8% is produced radiogenically. A proposed role of thermal-to-fast neutron flux ratio is discussed.

Author Information

Weeks, JR

Brookhaven National Laboratory, Upton, NY

Czajkowski, CJ

Brookhaven National Laboratory, Upton, NY

Farrell, K

Oak Ridge, National Laboratory, Oak Ridge, TN

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Developed by Committee: E10

Pages: 1168–1182

DOI: 10.1520/STP23996S

ISBN-EB: 978-0-8031-5262-5

ISBN-13: 978-0-8031-1488-3

Effects of High Thermal Neutron Fluences on Type 6061 Aluminum

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