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To investigate the effects of FIB damage on mechanical behavior, we tested Mo-alloy micropillars that were FIB milled following directional solidification, and compared their compressive response to pillars that were not FIB milled.
This behavior can be attributed to the avoidance of peritectic solidification and to the alloying influence on the kinetics of the β ⇒ α transformation following solidification.
This interpretation is supported by numerical simulations of heat transport during the solidification following material flow, leading to orientation maps in full qualitative agreement with the experimental data.
The alloys were prepared as 1 kg buttoms by plasma arc melting and had a nominally constant Ti Al ratio of 1.14 with Mn levels of 5, 10, 20 and 30 at.%. X-ray diffraction showed that the phases γ-TiAl, α2-Ti3Al, β-Ti (andMn,Al 2TiMn,are2Ti are present in the alloys in varying quantities following solidification.
The NLCs with controlled size were achieved using high shear dispersion following solidification of oil-in-water emulsion.
Fine equiaxed grain structures were observed in as-built specimens following solidification, which then evolved toward a highly heterogeneous bimodal grain structure after annealing.
In both cases, cells were added to rat collagen type I hydrogel (42% collagen in DMEM), and then, following solidification, fixed in 4% paraformaldehyde for 15 minutes at room temperature and washed with PBS.
The solidification of an AlMg4.7Si8 alloy has been followed in situ by fast synchrotron microtomography.
In all experiments, the solidification front was planar and in the steady-state, and therefore produced a homogeneous parent phase for the following δ γ transformation.
