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An apparatus has been built to study the creep behaviour of metallic materials during light ion irradiation under torsional loading. A cylindrical specimen is stressed in torsion by a current carrying coil inside a permanent magnet. The resulting shear strain is measured by an optically coupled system which has a strain resolution of about 5 x 1.0 E-7 for a typical specimen. The specimen is cooled by a high velocity helium jet directed perpendicular to both specimen axis and incident particle beam. The helium temperature is held constant at 20 C. Cooling rate measurements show that under irradiation damage rates of over 1.0 E-5 dpa/s are possible. In a first series of tests the creep behaviour of 20% cold-worked 316 L stainless steel during irradiation with 19 MeV deuterons has been determined for temperatures between 65 C and 500 C. These tests show that: - the principal design goals have been reached in the final experimental set up; - for temperatures above 250 C the irradiation creep rate increases slightly with temperature; - for temperatures below 200 C the creep rate slows down continuously with the irradiation time without reaching a constant value within the duration of the test.

Additional information

Authors: SCHOLZ R, JRC Ispra Estab. (IT)
Bibliographic Reference: EUR 11632 EN (1988)
Availability: (2)
Record Number: 198910077 / Last updated on: 1994-12-01
Original language: en
Available languages: en
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