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Mechanical anisotropy and segregation in Mo5Si3 studied by EBSD
- Source :
-
Intermetallics . Mar2005, Vol. 13 Issue 3/4, p367-372. 6p. - Publication Year :
- 2005
-
Abstract
- Abstract: The cracking behaviour of indented areas in monolithic Mo5Si3 and segregation in Cr-alloyed Mo5Si3 have been studied by electron back-scattering diffraction (EBSD) in a scanning electron microscope (SEM). Vickers indentation of Mo5Si3 indicates preferred cleavage across the [001] direction, resulting in chipping if the indent is normal to the (001) plane. The other two alloyed Mo5Si3-based compounds studied in this work, i.e. Mo3Cr2Si3 and Mo3Ti2Si3, behave differently during heat treatment. Mo3Cr2Si3, on the one hand, shows unexpected additional X-ray reflections together with broadening of reflections after annealing, when compared to its as-cast condition. Observations of increased segregation upon annealing are made, presumably by a separation into Cr-lean and Cr-enriched (Mo,Cr)5Si3, especially in the <100> directions according to EBSD. Segregation of Cr is linked to additional reflections in X-ray diffraction (XRD). Mo3Ti2Si3, on the other, seems to be in chemical equilibrium in the as-cast state according to energy dispersive spectrometry (EDS) measurements, and there is little difference in XRD between as-cast and heat treated alloys. [Copyright &y& Elsevier]
Details
- Language :
- English
- ISSN :
- 09669795
- Volume :
- 13
- Issue :
- 3/4
- Database :
- Academic Search Index
- Journal :
- Intermetallics
- Publication Type :
- Academic Journal
- Accession number :
- 17411013
- Full Text :
- https://doi.org/10.1016/j.intermet.2004.07.038