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Processing—Microstructure—Property Relationships of Titanium and Titanium Alloys: On-Demand Oral Presentations
Sponsored by: TMS Titanium Committee
Program Organizers: Yufeng Zheng, University of North Texas; Rongpei Shi, Harbin Institute of Technology; Michael Gram, Pratt & Whitney

Friday 8:00 AM
October 22, 2021
Room: On-Demand Room 7
Location: MS&T On Demand

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Deformation Behavior of Ti-Ni-Fe Based Ternary B2 Pseudo Binary Intermetallic: Subha Panda¹; Jayant Jain²; Sudhanshu Singh³; ¹Indian Institute of Technology Kanpur; ²IIT Delhi; ³IIT Kanpur
    Ductility in intermetallics is achieved by contrivances, such as using materials that deviate from stoichiometry and have metastable disordered structure, adding dopants such as boron or stress induced transformation. Further B2 structured intermetallics deform to different extent: polycrystalline NiAl (aluminides) elongates up to 1-2 % before fracture; ternary ZrCoNi elongate up to 18 %, respectively. Whilst binary B2 compounds have been explored a lot, only a few pseudo-binary B2 intermetallics have been investigated. This work focuses on Ti-based pseudo-binary intermetallic such as Ti-Ni-Fe. Microstructural and mechanical characterization have been carried out using SEM, XRD, EBSD, bulk compression, micro-indentation and nano-indentation. It is attributed that the variation in properties is not only due to the composition but also due to a cumulative effect of texture, the presence of point defects, such as antisite and the variation of bond energy & site preference energy due to ternary substitution.

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