Mechanical behavior of homogeneous and nearly homogeneous Ti 3 Sn: Role of composition and microstructure
Source abstract
Abstract
Abstract The impact of composition and grain size on mechanical behavior of as-cast Ti 3 Sn and near Ti 3 Sn alloys is investigated at room temperature in uni-axial compression and three-point bending tests. The concentration dependencies of both yield strength and bending failure strain show extreme behavior in the room temperature homogeneity range with minimum (about 90 MPa) and maximum (15%), respectively, for the Ti 75.6 Sn 24.4 composition. The failure strain in adjacent two-phase regions does not depend on Ti/Sn ratio and is about 2–3%. The yield strength of all the alloys is shown to increase according to the Hall-Petch type relation. A defect structure evolution during the process of deformation, studied with optical and electron microscopy, is indicative of the activation of a twinning deformation mechanism in a matrix phase. Inter-grain and inter-phase boundaries impede this deformation and affect nucleation and propagation of cracks.
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Research context
OpenAlex topics: Titanium Alloys Microstructure and Properties · Intermetallics and Advanced Alloy Properties · MXene and MAX Phase Materials
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