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Tensile specimens of solution annealed and cold-worked 316 and PCA type austenitic stainless steels were irradiated in the HFIR, HFR and R2 reactors to 3.1-10.9 dpa at 523 K. The yield stresses of solution annealed 316L and PCA reached a plateau level of about 820 MPa at 6 dpa. Earlier reported tensile curves are reviewed and analysed by their remaining homogeneous strain hardening. Radiation hardening of similar steels in cold-worked condition (20%CW 316 and 25%CW PCA) saturated at 1040 MPa. Uniform elongation of the annealed steels gradually decreased from 12% at 3.1 dpa to 3% at 10.9 dpa. The cold-worked steels lost their remaining strain hardening capability within 3 dpa. A tentative correlation between yield stress and uniform elongation suggests an upper yield stress limit of about 850 MPa to the occurrence of homogeneous plastic flow at 523 K.

Additional information

Authors: ELEN J D, JRC Ispra (IT);FENICI P, JRC Ispra (IT)
Bibliographic Reference: Paper presented: International Conference on Fusion Reactor Materials (ICFRM-5), Oak Ridge National Laboratory, Clearwater (US), Nov. 17-22, 1991
Availability: Available from (1) as Paper EN 36642 ORA
Record Number: 199210373 / Last updated on: 1994-12-02
Original language: en
Available languages: en