Material flow

About: Material flow is a research topic. Over the lifetime, 3050 publications have been published within this topic receiving 36844 citations. The topic is also known as: material stream.

Plastic fans having improved fan ring weld line strength

Abstract: Injection molded ring fan embodiments and methods for making them. The methods influence material flow during the injection molding process such that a major portion of the materials flowing in opposite directions in the outer rings preferably flow past one another, intermix in a swirling relationship, and/or collide at an angle relative to one another. This results in better material mixing or integration of the flow fronts. In one embodiment, the thickness of the outer ring varies in different portions between adjacent fan blades.

Effect of die pockets on multi-hole die extrusion

Abstract: It is well known that die pocket technology if properly adopted in the extrusion process can, to some extent, balance the material flow. However, the literature describing or analysing this process is sparse although the industrial application of pocket die extrusion is quite common. In this paper, the influence of the pocket on material flow in multi-hole extrusion is modelled by three-dimensional FEM. The exit velocity profiles, the temperature difference, the deformation history of the material across the die orifice are clearly illustrated, and they correspond well with experimental data. It is shown that the material flow can be more homogeneous than normal extrusion if the appropriate pocket die design is applied. The influence of pocket die design on material structure is also studied by the use of physically based models combined with FEM simulation.

Influence of the Tool Shoulder Contact Conditions on the Material Flow During Friction Stir Welding

Abstract: Friction stir welding (FSWing) is a solid-state joining process of special interest in joining alloys that are traditionally difficult to fusion weld. In order to optimize the process, various numeric modeling approaches have been pursued. Of importance to furthering modeling efforts is a better understanding of the contact conditions between the workpiece and the weld tool. Both theoretical and experimental studies indicate the contact conditions between the workpiece and weld tool are unknown, possibly varying during the FSW process. To provide insight into the contact conditions, this study characterizes the material flow in the FSW nugget by embedding a lead (Pb) wire that melted at the FSWing temperature of aluminum alloy 2195. The Pb trace provided evidence of changes in material flow characteristics which were attributed to changes in the contact conditions between the weld tool and workpiece, as driven by temperature, as the tool travels the length of a weld seam.

Grain size and workpiece dimension effects on material flow in an open-die micro-forging/extrusion process

Abstract: The interactive effect of grain size and specimen dimensions on the material flow and microstructural evolution was studied in a progressive open-die microforming process Particular interest was p