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Two new alloys, resulting from the addition of carbon and hafnium to a well-known high entropy alloy u2013, were developed by conventional casting under inert atmosphere and characterized. These HEA/HfC alloys are double-phased, with an austenitic matrix and interdendritic script u2013like HfC carbides.
Source link: https://doi.org/10.56958/jesi.2022.7.3.305
Under temperature cycling and different strain amplitudes, the out-of-phase thermomechanical fatigue behavior of the two Al-Si cast alloys most commonly used for engine applications was investigated. The TMF life of the 319 alloy was generally longer than that of the 356 alloy, particularly at higher strain amplitudes. During the TMF tests, all the precipitates were coarsened; however, the coarsening rate in the 356 alloy was much higher than that in the 319 alloy; however, the 356 alloy's coarsening rate per cycle was noticeably higher than that in the 319 alloy.
Source link: https://doi.org/10.3390/ma16020829
Small amounts of Sc and Zr on the microstructure in the as-cast condition make it a % Si alloy by small amounts of Sc and Zr on the microstructure. Both during supercooling and the formation of primary Al3Sc particles in the liquid phase. % Si are more vulnerable to the onset of this phase than others because a lower concentration of Sc is required for it to occur. Si's resignation of Mg2Si needs lower temperatures, which may lead to more effective heat treatment, which may require lowering the number of steps. TEM results reveal that during ingot cooling 3ScZr disoid precipitates, there were no precipitates. With the L12 structure and needle-shaped particles, this dispersoid could precipitate as cohesive and semi-coherent particles with L12 symmetry as well as needle-shaped particles. During ingot cooling, coherent and semi-coherent particles precipitation indicates that they can be obtained during subsequent multistage heat treatment.
Source link: https://doi.org/10.3390/met11111797
Graphitic cast irons include grey iron, compacted iron, malleable iron, and ductile iron. Graphite cast irons include grey iron, compacted iron, malleable iron, and ductile iron. Crustile irons from the Graphitic cast irons include white cast iron and alloy cast irons. According to the Fe-C equilibrium diagram, solidification of graphite directly from molten metal takes place between 1145 to 1152 b0C.
Source link: https://doi.org/10.1017/s1551929500053244
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