Journal of Nuclear Energy Science & Power Generation TechnologyISSN: 2325-9809

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Research Article, J Nucl Ene Sci Power Generat Technol Vol: 3 Issue: 2

Helium Induced Reduction of the Grain-Boundary Tensile Strength in Tungsten

Ksenofontov VA, Mazilova TI, Sadanov EV, Dudka OV, Mazilov AA, Starchenko IV and Mikhailovskij IM*
National Scientific Center, Kharkov Institute of Physics and Technology, Academicheskaja, Kharkov, Ukraine
Corresponding author : Igor M. Mikhailovskij
National Science Center, Kharkov Institute of Physics and Technology, 1 Akademicheskaja str., 61108 Kharkov-108, Ukraine
E-mail: [email protected]
Received: January 05, 2014 Accepted: February 26, 2014 Published: March 15, 2014
Citation: Ksenofontov VA, Mazilova TI, Sadanov EV, Dudka OV, Mazilov AA et al., (2014) Helium Induced Reduction of the Grain-Boundary Tensile Strength in Tungsten. J Nucl Ene Sci Power Generat Technol 3:2. doi:10.4172/2325-9809.1000120

Abstract

Helium Induced Reduction of the Grain-Boundary Tensile Strength in Tungsten

We perform an experimental investigation and computer modeling of the influence of the heliu m segregation on the inherent strength of high-angle grain boundaries in tungsten, which is a promising plasma-facing material in nuclear fusion devices. Tensile tests of tungsten bicrystals were conducted inside a field-ion microscope by means of high-field mechanical loading. It is shown that the intergranular helium adsorption induces reduction of the inherent grain-boundary tensile strength.

Keywords: Grain boundaries; Tensile strength; Tungsten; Helium; Field ion microscopy; Mathematical modeling; Radiation embrittlement

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