In a closed die forging process, it is impossible to form complex shapes in one stage, and thus it becomes necessary to use preform dies. In the present study, Backward Deformation Method and FE simulation via ABAQUS software has been used in order to design preform die of the H-shaped parts. In the Backward Deformation Method, the final shape of the part is considered as a starting point and u...

Several physics-based models have been utilized in material design for the simulation and prediction of properties. In this study, several machine-learning (ML) approaches were used to construct a model analyze influence equal-channel angular pressing (ECAP) parameters on microstructural, corrosion mechanical behavior biodegradable magnesium alloy ZK30. The ML employed linear regression, Gaussi...

Tensile specimens of nonflammable AZ91D Mg alloy were fabricated in this study via cold chamber die-casting process. Dimensions of tensile specimens were 25mm in length, 4mm in width, and 0.8 or 3.0mm in thickness. Microstructure observation was conducted before and after tensile tests at room temperature. In the die casting process, various injection distances from 150 to 260mm were employed t...

'n Ontleding van geskiedkundige tendense toon 'n toenemende mate van bereidwilligheid by werkgewers om hul gesag met werknemers te deel. Hierdie bereidwilligheid word verder onderskraag deur die uitlatings van sommige "industriële demokrate" wat meen dat werknemers in organisasies minstens soveel gesag moet hê as bestuurders. In die artikel word aangevoer dat dié standpunt ‘n oorvereenvoudiging...

SYNOPSIS. The lateral hypaxial musculature (LHM) of salamanders may serve as a useful model for understanding the functions of LHM in tetrapods more generally. Salamanders have between two and four layers of LHM, arranged segmentally in myomeres. These layers produce three primary mechanical actions: they bend the body, pressurize the body, and produce or resist torsion about the long axis of t...