Fast neutron environments.

Buchheit, Thomas Edward ; Kotula, Paul Gabriel ; Lu, Ping ; Brewer, Luke N. (Naval Postgraduate School, Monterey, CA) ; Goods, Steven Howard (Sandia National Laboratories, Livermore, CA) ; Foiles, Stephen Martin ; Puskar, Joseph David ; Hattar, Khalid Mikhiel ; D

关键词: COMPRESSION;    DIFFUSION;    FAST NEUTRONS;    IRRADIATION;    MECHANICAL PROPERTIES;    NEUTRONS;    REACTORS;    REFRACTORY METALS;    STAINLESS STEELS;    TESTING;   

DOI  :  10.2172/1031313
RP-ID  :  SAND2011-8527
PID  :  OSTI ID: 1031313
Others  :  TRN: US201201%%686

学科分类：材料科学（综合）

美国|英语

来源: SciTech Connect

【 摘 要 】

The goal of this LDRD project is to develop a rapid first-order experimental procedure for the testing of advanced cladding materials that may be considered for generation IV nuclear reactors. In order to investigate this, a technique was developed to expose the coupons of potential materials to high displacement damage at elevated temperatures to simulate the neutron environment expected in Generation IV reactors. This was completed through a high temperature high-energy heavy-ion implantation. The mechanical properties of the ion irradiated region were tested by either micropillar compression or nanoindentation to determine the local properties, as a function of the implantation dose and exposure temperature. In order to directly compare the microstructural evolution and property degradation from the accelerated testing and classical neutron testing, 316L, 409, and 420 stainless steels were tested. In addition, two sets of diffusion couples from 316L and HT9 stainless steels with various refractory metals. This study has shown that if the ion irradiation size scale is taken into consideration when developing and analyzing the mechanical property data, significant insight into the structural properties of the potential cladding materials can be gained in about a week.