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Cyclic strain localization and observation of surface relief in nearly lamellar cast γ-TiAl based alloy Ti–48Al–2Nb–2Cr–0.82B (all in at. %) cycled in strain control were experimentally studied. Hysteresis loop area, the cyclic hardening curves, the cyclic stress-strain curve and VH parameter were measured. Surface relief of cyclically strained specimens was observed using scanning electron microscopy...
The low-cycle fatigue properties of TiAl alloys with 2 at.% and 7 at.% of Nb with nearly lamellar microstructure were studied at room temperature and 750 °C. Cyclic hardening/softening curves, cyclic stress-strain curves (CSSC) and fatigue life curves were obtained at both temperatures as well as monotonic tensile properties. Both materials show stable cyclic response at 750 °C. At room temperature,...
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