On the relation between microstructure and elastic constants of tungsten/\nsteel composites fabricated by spark plasma sintering

0495154 - ÚFP 2019 RIV CH eng J - Článek v odborném periodiku
Koller, M. - Kruisová, Alena - Mušálek, Radek - Matějíček, Jiří - Seiner, Hanuš - Landa, Michal
On the relation between microstructure and elastic constants of tungsten/
steel composites fabricated by spark plasma sintering.
Fusion Engineering and Design. Roč. 133, August 2018 (2018), s. 51-58. ISSN 0920-3796. E-ISSN 1873-7196
Grant CEP: GA ČR GB14-36566G
Institucionální podpora: RVO:61389021 ; RVO:61388998
Klíčová slova: plasma-facing materials * tungsten/steel composites * spark plasma sintering * elastic constants
Obor OECD: Mechanical engineering; Applied mechanics (UT-L)
Impakt faktor: 1.457, rok: 2018
https://www.sciencedirect.com/science/article/pii/S0920379618304733

Tungsten/steel composites might play an important role in plasma-facing components, especially in joining of
tungsten armor to structural parts made of steel. In this work, Young's moduli and shear moduli of a set of
tungsten/P91 steel composites fabricated by spark plasma sintering were determined by resonant ultrasound
spectroscopy. It was observed that the sintering temperature and the volume fractions of the individual phases
have strong effects on the macroscopic elastic constants. The results were interpreted by means of a finite
elements numerical model, showing that the regions of imperfectly bonded tungsten particles appearing in the
microstructure of some of the composites act effectively as inclusions with very low elastic stiffness. A good
correlation between the number of these regions in the microstructure and the elastic constants was observed.
Trvalý link: http://hdl.handle.net/11104/0288168