科研之友
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摘要
In the temperature range from -115 to +120A degrees C, mechanical tests of samples of austenitic stainless steels 12Kh18N10T and 08Kh16N11M3-materials for the casings of spent fuel assemblies of a reactor BN-350 irradiated by neutrons to damaging doses of 11-55 dpa-have been carried out. In the range of cryogenic temperatures, in these highly irradiated steels there was discovered and investigated a new phenomenon-a "wave of plastic deformation," which consists in the initiation, development, and propagation of a deformation band over the length of the sample, which leads to a possibility of reaching total relative deformation of 20% and greater, instead of 3-5% usually observed at given damaging doses. The role of a martensitic gamma -> alpha' transformation in the formation of the "wave" and in the improvement in the mechanical properties of the metastable steel irradiated by neutrons is discussed.
- 出版日期2010-11
