Detection of micro cracking and SiC fiber distribution and its relationship between dark-field images using Talbot-Lau interferometer

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Optimizing RMI atmosphere for SiC/SiC composites fabrication

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Measurement method of in-situ tensile strength of SiC fiber in SiC/SiC composite

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Tensile loading-unloading behavior in SiC/SiC CMC at room and elevated temperature in air using a new mechanical testing machine

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Measurement of exothermic reaction temperature during RMI process

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Influence of preliminary extrusion conditions on the superplastic properies of a magnesium alloy processed by ECAP

The microstructures and properties of a two-phase Mg–8% Li alloy were evaluated in three different conditions: after casting; after casting followed by extrusion at different temperatures and speeds; and after casting, extrusion and processing by ECAP for four passes at room temperature using a die with a channel angle of 135°. The results show extrusion introduces significant grain refinement and there is additional refinement in ECAP. In tensile testing, the elongations to failure increase with decreasing extrusion temperature, but are essentially independent of the extrusion speed. The ductilities are low in the cast condition, intermediate in the extruded condition and high after extrusion and ECAP. For the last condition, an exceptionally high elongation of 1780% was achieved at a testing temperature of 473 K. It is shown that it is advantageous to use a die with a channel angle of 135° because it permits pressing at room temperature where grain growth is limited

Improving the superplastic properties of a two-phase Mg–8% Li alloy through processing by ECAP

Significant grain refinement was achieved in a cast Mg–8 mass% Li alloy through processing by equal-channel angular pressing (ECAP) using a die having an internal channel angle of 110° and a pressing temperature of 473 K. Following extrusion and subsequent ECAP through two passes, the alloy exhibited excellent superplastic properties including a maximum elongation of ~970% at 473 K when using an initial strain rate of 1.0 × 10?4 s?1. The strain rate sensitivities under the optimum superplastic conditions were measured as m ? 0.4–0.6. The maximum elongation achieved in this investigation is very high by comparison with other Mg alloys tested in tension at similar temperatures and strain rates