The characteristics of defect bands in the microstructure high pressure die casting (HPDC) AE44 magnesium alloy were investigated. Special attention was paid to effects process parameters during HPDC and structure on distribution bands. Results show that are solute segregation with enrichment Al, Ce La elements, which basically form Al11RE3 phase. There is no obvious aggregation porosities widt...

Abstract Pores have been the main focus of quality assurance in castings. Latest research has shown that aluminium castings pores can form only if there is existing entrainment damage, i.e., are merely visible parts and usually invisible damage much more extensive. However, its effect on deformation behaviour not previously established or observed in-situ. This work applies 2D Digital Image Cor...

background and aims. because of compromised angulations of implants, the abutments are sometimes prepared. the purpose of this study was to investigate the effect of removing one wall of the implant abutment on the retention of cement-retained crowns. materials and methods. four prefabricated abutments were attached to analogues and embedded in acrylic resin blocks. the first abutment was left ...

in this paper wave transformation in a submerged sloped breakwater and its hydraulic performance was simulated by developing a numerical model in fortran. the code was established by combining porous flow and a two-phase model using vof method. modified navier-stokes and k-ε equations implemented to the model to simulate the flow in porous media. cut cell method was modified to simulate fluid t...