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Archives of Metallurgy and Materials

The Journal of Institute of Metallurgy and Materials Science and Commitee on Metallurgy of Polish Academy of Sciences

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Open Access

Microstructure Characterization of Tungsten Based Alloys for Fusion Application

G. Cempura1 / A. Kruk1 / C. Thomser2 / M. Wirtz2 / A. Czyrska-Filemonowicz1

1Agh University of Science and Technology, International Centre of Electron Microscopy for Materials Science & Faculty of Metals Engineering and Industrial Computer Science, al. A. Mickiewicza 30, 30-059 Kraków, Poland

2Forschungszentrum Jülich, Institute of Energy and Climate Research, 52-428 Jülich, Germany

This content is open access.

Citation Information: Archives of Metallurgy and Materials. Volume 58, Issue 2, Pages 473–476, ISSN (Print) 1733-3490, DOI: 10.2478/amm-2013-0020, July 2013

Publication History

Published Online:

The microstructure of two tungsten based alloys (W-1.1%TiC and W-1.7% TiC) was characterized using light microscopy, analytical electron microscopy and electron tomography. These alloys represent a class of W based dispersion strengthened alloys with TiC used as strengthening particles. Addition of TiC leads to improved creep resistance and tensile strength of the W based alloys. The results show that the W-1.7%TiC alloy exhibits large scatter in grain size, much higher porosity and contains also Ti-O particles. The W-1.1%TiC alloy has fine grained microstructure with uniformly distributed fine TiC particles within the matrix and low porosity. As a result of the different microstructure, the W-1.1%TiC alloy exhibits better mechanical properties, when compared to the W-1.7%TiC alloy.

W pracy przedstawiono wyniki badan mikrostruktury dwóch stopów wolframu: W-1.1%TiC oraz W-1.7%TiC. Badania przeprowadzono z wykorzystaniem technik mikroskopii swietlnej, analitycznej mikroskopii elektronowej oraz tomografii elektronowej. Przebadane stopy reprezentuja grupe stopów wolframu umacnianych dyspersyjnie czastkami TiC. Dodatek TiC poprawia odpornosc na pełzanie oraz wytrzymałosc tych stopów. Badania wykonane dla stopu W-1.7%TiC wskazuja na duze róznice w wielkosci ziarna, duza porowatosc oraz wystepowanie czastek TiO. Stop W-1.1TiC posiada drobnoziarnista strukture, niska porowatosc oraz równomiernie rozmieszczone czastki TiC w osnowie W. Stop W-1.1%TiC charakteryzuje sie znacznie lepszymi własciwosciami mechanicznymi niz stop W-1.7%TiC.

Keywords : fusion; tungsten based alloys; electron microscopy; electron tomography

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