Structure-property relationship of the as-cast -Ti-45Al-2Nb-0.7Cr-0.3Si based intermetallic alloy was examined. The phases stable at room temperature in the alloy were /a(sub)2/Ti(sub)5Si(sub)3, respectively; while their crystal structures were described by means of chemical formulas, Pearson's number, space groups, lattice parameters, atomic positions and occupancy numbers using a Vienna ab initio simulation package (VASP) software for materials design. Moreover, high resolution electron backscatter diffraction (HSEBSD) was used to analyse the orientation relationship of both the as-cast (ß-solidifying) and heat-treated (a-solidifying) microstructural phases. The results showed that the formation of /a(sub)2/Ti(sub)5Si(sub)3 follows the Blackburn orientation relationship (BOR): (ß-solidifying) {110}(sup)ß//{0001}(sup)a and <111>(sup)ß//<2 1 10>(sup)a, and for (a-solidifying) = (111) || (0001)a and <1 10] || <11 20>a.
Reference:
Mathabathe, M.S., Bolokang, A.S., Govender, G, Mostert, R.J., and Siyasiya, C.W. 2018. Structure-property orientation relationship of a /a2/Ti5Si3 in as-cast Ti-45Al-2Nb-0.7Cr-0.3Si intermetallic alloy. Journal of Alloys and Compounds, v(765), pp 690-699.
Mathabathe, M. S., Bolokang, A. S., Govender, G., Mostert, R., & Siyasiya, C. (2018). Structure-property orientation relationship of a /a2/Ti5Si3 in as-cast Ti-45Al-2Nb-0.7Cr-0.3Si intermetallic alloy. http://hdl.handle.net/10204/10720
Mathabathe, Maria S, Amogelang S Bolokang, Gonasagren Govender, RJ Mostert, and CW Siyasiya "Structure-property orientation relationship of a /a2/Ti5Si3 in as-cast Ti-45Al-2Nb-0.7Cr-0.3Si intermetallic alloy." (2018) http://hdl.handle.net/10204/10720
Mathabathe MS, Bolokang AS, Govender G, Mostert R, Siyasiya C. Structure-property orientation relationship of a /a2/Ti5Si3 in as-cast Ti-45Al-2Nb-0.7Cr-0.3Si intermetallic alloy. 2018; http://hdl.handle.net/10204/10720.
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