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Reports Outline Nuclear Materials Study Results from Central Research Institute (Physical and mechanical modeling of the neutron irradiation effect...

August 29, 2014



Reports Outline Nuclear Materials Study Results from Central Research Institute (Physical and mechanical modeling of the neutron irradiation effect on ductile fracture. Part 2. Prediction of swelling effect on drastic decrease in strength)

By a News Reporter-Staff News Editor at Science Letter -- New research on Nuclear Materials is the subject of a report. According to news reporting originating from St. Petersburg, Russia, by NewsRx correspondents, research stated, "A drastic decrease in the ultimate tensile strength of irradiated austenitic steels with high swelling values is considered. The physical-mechanical model proposed in Part 1 of the present paper is applied for the prediction of a drastic decrease in ultimate tensile strength."

Our news editors obtained a quote from the research from Central Research Institute, "The mechanism called by the authors the 'running collapse mechanism'' is used for modeling the material ductile fracture when stresses are less than the yield strength. This ductile mechanism is similar to brittle fracture when crack propagates unstable manner. Running collapse mechanism occurs due to evolution of vacancy voids resulting in irradiation swelling."

According to the news editors, the research concluded: "Nanoscale of vacancy voids (void sizes, distance between voids) results in the possibility of ductile fracture in very small zones whose size is considerably smaller than the grain size."

For more information on this research see: Physical and mechanical modeling of the neutron irradiation effect on ductile fracture. Part 2. Prediction of swelling effect on drastic decrease in strength. Journal of Nuclear Materials, 2014;452(1-3):607-613. Journal of Nuclear Materials can be contacted at: Elsevier Science Bv, PO Box 211, 1000 Ae Amsterdam, Netherlands. (Elsevier - www.elsevier.com; Journal of Nuclear Materials - www.elsevier.com/wps/product/cws_home/505671)

The news editors report that additional information may be obtained by contacting B. Margolin, Cent Res Inst Struct Mat Prometey, St Petersburg, Russia (see also Nuclear Materials).

Keywords for this news article include: Russia, Eurasia, St. Petersburg, Nuclear Materials

Our reports deliver fact-based news of research and discoveries from around the world. Copyright 2014, NewsRx LLC


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Source: Science Letter


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