Hot closed die forging is a regular process applied to manufacture metallic components used in supporting and fixing cable conductors in electric power transmission lines. In this forming process, the final microstructure of the workpiece depends on the control of several processing parameters. In this study, simulation of the industrial forging process of a ball hook component was performed us...

Starting from a general Landau-type 3D model for the shape memory alloy dynamics we have developed a new mathematical \slow manifold" model that allows us to describe eeectively the main features of the thermomechanical behaviour of CuAlNi alloys. A robust numerical procedure, developed in our earlier papers for the Falk model, has been generalised to this case. Results of the mathematical mode...

High-order and multiple modes in high-frequency micro/nanomechanical resonators are attractive for empowering signal processing and sensing with multi-modalities, yet many challenges remain in identifying and manipulating these modes, and in developing constitutive materials and structures that efficiently support high-order modes. Here we demonstrate high-frequency multimode silicon carbide mi...

For powder-bed electron beam additive manufacturing (EBAM), support structures are required when fabricating an overhang to prevent defects such as curling, which is due to the complex thermomechanical process in EBAM. In this study, finite element modeling is developed to simulate the thermomechanical process in EBAM in building overhang part. Thermomechanical characteristics such as thermal g...

A Thermomechanical Analysis of An Ultrasonic Bonding Mechanism

The aim of this paper is to present the advantages of using Digital Image Correlation (DIC) and Infrared Thermography (IRT) to investigate the thermomechanical behavior of aluminum at the scale of its microstructure. The study combines these complementary imaging techniques: Electron Backscatter Diffraction (EBSD) to characterise the microstructure of the sample, DIC to obtain strain fields and...

Titanium alloys have been considered as unique materials for many years. Even their microstructure and operational properties well known described in details, the new technologies introduced—e.g., 3D printing—have restored need further research this area. It is understood that martensitic transformation usually applied heat treatment of hardenable (e.g., Fe alloys), but case titanium alloys, it...

By employing a “modulated-temperature” heating programme composed of a series of heat-isotherm stages, it is possible to separate the change in dimensions of an oriented material during heating into two contributions: a thermally “reversing” component which is due to linear thermal expansion and a “nonreversing” part arising from relaxation to the disordered state on heating above Tg . Some pre...