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This paper describes the combined effect of hydrogen and liquid Pb-17Li on the tensile properties of DIN 1.4914 martensitic steel. Tensile tests at 1.1 x 1.0 E-4/s and 2.8 x 1.0 E-7/s were carried out on notched and unnotched tensile specimens. Comparison of the amount of plastic strain at rupture for specimens tested in air, vacuum, hydrogen, Pb-17Li and Pb-17Li/hydrogen indicated that hydrogen does not dramatically embrittle DIN 1.4914. The plastic strain for specimens tested in Pb-17Li/hydrogen at 250 C was approximately equal to those tested in Pb-17Li. However, at 400 C the plastic strain in Pb-17Li/hydrogen (14.5%) was lower than in Pb-17Li only (19%). A ductile fracture mode was observed in all of the tests. Slow strain rate tests at 250 C yielded serrated stress-strain curves. This phenomenon can be attributed to the Portevin-Le Chatelier effect of solute atom pinning of the dislocations.

Additional information

Authors: SAMPLE T, JRC Ispra (IT);COEN V, JRC Ispra (IT);KOLBE H, JRC Ispra (IT);ORECCHIA L, JRC Ispra (IT)
Bibliographic Reference: Paper presented: ICFRM-5 Conference, Clearwater, Florida (US), Nov. 17-22, 1991
Availability: Available from (1) as Paper EN 36518 ORA
Record Number: 199210077 / Last updated on: 1994-12-02
Original language: en
Available languages: en