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, respectively. Differences in thermal resistance were attributed to the effect of nanoparticles shape on the porosity of nanoparticles’ layer, which influenced thermal performance of the heat pipe......
discontinuities such as cracks, voids, porosity and inclusions during FW significantly affect the quality and mechanical properties of the welds. In 1990’s, a solid state welding process, friction stir... the heat input and plastic deformation by UFSW [27,28]. UFSW gives improved mechanical properties by minimizing various welding defects like porosity, shrinkage, and  ......