Mathabathe, Maria NGovender, GonasagrenBolokang, Amogelang SMostert, RJSiyasiya, CW2019-06-262019-06-262018-05Mathabathe, M.N. et al. 2018. Phase transformation and microstructural control of the a-solidifying -Ti-45Al-2Nb-0.7Cr-0.3Si intermetallic alloy. Journal of Alloys and Compounds, vol. 757: 8-150925-8388https://www.sciencedirect.com/science/article/pii/S0925838818317304https://doi.org/10.1016/j.jallcom.2018.05.051http://hdl.handle.net/10204/11010Copyright: 2018 Elsevier. This is the accepted version of the published article. For access to the published version, kindly consult the publisher's website: https://doi.org/10.1016/j.jallcom.2018.05.051The -Ti-45Al-2Nb-0.7Cr-0.3Si based intermetallic alloy was developed. Microstructure evolution of the as-cast and heat-treated alloy yielded the spheriodised and Widmanstätten laths. High temperature differential thermal analysis (HTDTA) was performed on the as-cast Ti-45Al-2Nb-0.7Cr-0.3Si alloy in order to determine critical temperatures and provide insight into phase transformations prior heat treatment. The morphology of the alloy was analysed by the optical microscopy, scanning and transmission electron microscopy (SEM/TEM). The SEM was equipped with energy dispersion spectroscopy (EDS) for chemical composition. The EBSD mapping was employed to determine microstructural evolution. The results show that after heat-treatment the homogeneous microstructures were obtained, compared to the dendritic as-cast structure. The spheriodised laths were seen embedded inside the lamellar structure; whereas the Widmanstätten laths were observed as crossed/needle like (a2+ ) laths of small spacing, with a spatial orientation with respect to the lamellar structure. The structural development was determined by the X-ray diffraction (XRD).enPhase transformationy-TiAl based alloysDifferential thermal analysisDTAHeat treatmentSolidificationArticleMathabathe, M. N., Govender, G., Bolokang, A. S., Mostert, R., & Siyasiya, C. (2018). Phase transformation and microstructural control of the a-solidifying -Ti-45Al-2Nb-0.7Cr-0.3Si intermetallic alloy. http://hdl.handle.net/10204/11010Mathabathe, Maria N, Gonasagren Govender, Amogelang S Bolokang, RJ Mostert, and CW Siyasiya "Phase transformation and microstructural control of the a-solidifying -Ti-45Al-2Nb-0.7Cr-0.3Si intermetallic alloy." (2018) http://hdl.handle.net/10204/11010Mathabathe MN, Govender G, Bolokang AS, Mostert R, Siyasiya C. Phase transformation and microstructural control of the a-solidifying -Ti-45Al-2Nb-0.7Cr-0.3Si intermetallic alloy. 2018; http://hdl.handle.net/10204/11010.TY - Article AU - Mathabathe, Maria N AU - Govender, Gonasagren AU - Bolokang, Amogelang S AU - Mostert, RJ AU - Siyasiya, CW AB - The -Ti-45Al-2Nb-0.7Cr-0.3Si based intermetallic alloy was developed. Microstructure evolution of the as-cast and heat-treated alloy yielded the spheriodised and Widmanstätten laths. High temperature differential thermal analysis (HTDTA) was performed on the as-cast Ti-45Al-2Nb-0.7Cr-0.3Si alloy in order to determine critical temperatures and provide insight into phase transformations prior heat treatment. The morphology of the alloy was analysed by the optical microscopy, scanning and transmission electron microscopy (SEM/TEM). The SEM was equipped with energy dispersion spectroscopy (EDS) for chemical composition. The EBSD mapping was employed to determine microstructural evolution. The results show that after heat-treatment the homogeneous microstructures were obtained, compared to the dendritic as-cast structure. The spheriodised laths were seen embedded inside the lamellar structure; whereas the Widmanstätten laths were observed as crossed/needle like (a2+ ) laths of small spacing, with a spatial orientation with respect to the lamellar structure. The structural development was determined by the X-ray diffraction (XRD). DA - 2018-05 DB - ResearchSpace DP - CSIR KW - Phase transformation KW - y-TiAl based alloys KW - Differential thermal analysis KW - DTA KW - Heat treatment KW - Solidification LK - https://researchspace.csir.co.za PY - 2018 SM - 0925-8388 T1 - Phase transformation and microstructural control of the a-solidifying -Ti-45Al-2Nb-0.7Cr-0.3Si intermetallic alloy TI - Phase transformation and microstructural control of the a-solidifying -Ti-45Al-2Nb-0.7Cr-0.3Si intermetallic alloy UR - http://hdl.handle.net/10204/11010 ER -