SEDL / STP / STP1325-EB / STP13924S

Effects of Low Temperature Irradiation on the Mechanical Properties of V-4Cr-4Ti

Alexander, DJ
Metals and Ceramics Division, Oak Ridge National Laboratory, Oak Ridge, TN

Snead, LL
Metals and Ceramics Division, Oak Ridge National Laboratory, Oak Ridge, TN

Zinkle, SJ
Metals and Ceramics Division, Oak Ridge National Laboratory, Oak Ridge, TN

Gubbi, AN
Metals and Ceramics Division, Oak Ridge National Laboratory, Oak Ridge, TN

Rowcliffe, AF
Metals and Ceramics Division, Oak Ridge National Laboratory, Oak Ridge, TN

Eatherly, WS
Metals and Ceramics Division, Oak Ridge National Laboratory, Oak Ridge, TN

Bloom, EE
Metals and Ceramics Division, Oak Ridge National Laboratory, Oak Ridge, TN

Pages: 15    Published: Jan 1999

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Abstract

Neutron irradiation at low temperatures (100 to 275°C) to 0.5 displacements per atom causes significant embrittlement and changes in the subsequent room temperature tensile properties of V-4Cr-4Ti. The yield strength and microhardness at room temperature increase with increasing irradiation temperature. The tensile properties at room temperature show large increases in strength and a complete loss of work hardening capacity with no uniform elongation. Embrittlement, as measured by an increase in the ductile-to-brittle transition temperature, increases with increasing irradiation temperature, at least up to 275°C. It is shown that this embrittlement is not due to pickup of O or other interstitial solutes during the irradiation.