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Hash Hashemian: Visionary leadership
As Dr. Hashem M. “Hash” Hashemian prepares to step into his term as President of the American Nuclear Society, he is clear that he wants to make the most of this unique moment.
A groundswell in public approval of nuclear is finding a home in growing governmental support that is backed by a tailwind of technological innovation. “Now is a good time to be in nuclear,” Hashemian said, as he explained the criticality of this moment and what he hoped to accomplish as president.
Nuclear Technology | Volume 66 | Number 3 | September 1984 | Pages 630-638
G. Irradiation Behavior | Status of Metallic Materials Development for Application in Advanced High-Temperature Gas-Cooled Reactor / Material | doi.org/10.13182/NT84-A33484
Articles are hosted by Taylor and Francis Online.
The effect of neutron irradiation on hightemperature tensile and creep properties of austenitic heat-resistant alloys was studied. The effect, which appeared in the loss of ductility at elevated temperatures, was caused by helium produced by a nuclear transmutation reaction of thermal neutrons with boron and nickel in the alloy. The fracture mode was characterized by intergranular cracking. The tensile properties were determined at 700 to 1000°C after irradiation up to a maximum thermal neutron fluence of 1.2 x 1025 n/m2. Creep tests were made at 900°C after irradiation to 6.6 x 1024 and 7.5 x 1024 n/m2. The tensile ductility was reduced with increasing deformation temperature, due primarily to the loss of necking elongation. In the postirradiation creep tests, significant reduction in rupture life also occurred. In both tensile and creep properties, the iron-base alloys were superior to the nickel-rich alloys, and, in particular, a heat of Incoloy alloy 800 showed exceptionally high resistance to irradiation.