Using high-pressure torsion for metal processing: Fundamentals and applications

High pressure twist (HPT) refers to the treatment of metals subject to compressive forces and simultaneous torsional strain. The basic principles of the program were first proposed more than 60 years ago, but the processing of HPT has become very important in the past 20 years. Because this metal forming process offers the opportunity to achieve special grain refinement. It is nanoscale and has particularly high strength. This review summarizes the background and rationale of HPT processing and then outlines the latest reports on HPT processing materials. The results indicate that if the treatment is continued at a sufficient number of twist rates, the HPT treatment achieves a variety of attractive properties including excellent material strength, reasonable microstructure homogeneity, and superplastic forming and hydrogen storage The ability to achieve can be achieved. This review also covers recent developments such as applying HPT treatment to bulk and ring samples and using HPT to solidify the powder.

This process is mainly used in the high-tech metal industry and rapid manufacturing applications. The 3D printing apparatus is typically mounted on a multi-axis robotic arm and includes a nozzle for depositing metal powder or wire on the surface and an energy source (laser, electron beam or plasma arc) for melting it to form a solid object ). Six kinds of materials, such as polymer, metal, concrete, ceramic, paper, chocolate and other special foods can be used for laminate molding. The material is usually produced in the form of wire (filament), powder or liquid resin. The use of these materials is covered by all the seven 3D printing techniques mentioned above, although polymers are most commonly used and are suitable for use with certain materials rather than other materials. For the 3D printing material page, please read more about the materials that can be used for 3D printing.

High pressure twist (HPT) refers to the treatment of metals subject to compressive forces and simultaneous torsional strain. The basic principles of the program were first proposed more than 60 years ago, but the processing of HPT has become very important in the past 20 years. Because this metal forming process offers the opportunity to achieve special grain refinement. It is nanoscale and has particularly high strength. This review summarizes the background and rationale of HPT processing and then outlines the latest reports on HPT processing materials. This review also covers recent developments such as applying HPT treatment to bulk and ring samples and using HPT to solidify the powder.

Both SLM and DMLS are used in industrial applications to create end use engineering products. In this white paper, we use the term "metal 3D printing" to generically denote these two processes, and the basic mechanisms of the manufacturing process necessary for engineers and designers to understand the advantages and limitations of technology I will explain. There are other additional fabrication processes that can be used to produce high density metal parts such as electron beam melting (EBM) and ultrasonic addition manufacturing (UAM). Their availability and applications are limited and are not shown here. Click here for details on metal bond injection