UFG Werkstoffe durch Rundkneten

Production of UFG materials by rotary swaging

 

Motivation

Materials with ultra-fine size grains produced by severe plastic deformation (SPD) have promising properties, such as a combination of high strength and ductility, which makes them interesting for many technical applications. Despite the broad spectrum of potential applications, the commercial use of such materials was very limited so far, due to primarily high production costs of the UFG (ultra-fine grain) materials.

Objectives

The aim of the project is the development and optimization of a new SPD method based on a modified rotary swaging process for continuous production of UFG materials [Figure 1]. Beside the production of UFG materials, the optimization of the resulting material properties and increasing the process’ efficiency are the two main objectives.

Figure 1: Rotary swaging machine at the Institute of Production Engineering and Forming Machines
Figure 1: Rotary swaging machine at the Institute of Production Engineering and Forming Machines

Approach

First of all, an appropriate tool system will be developed for the SPD process. Following the conservative design of the first tool system, a second optimised tool system will be developed with the knowledge collected in the course of the project. As a result, the potential of the process shall be better exploited. By the development of the tool systems and optimisation of the SPD process, FEA will be used [Figure 2]. With the aid of the FE-simulations, the deformation of the workpiece will be analysed and the effects of the different tool concepts on the deformation characteristics will be investigated.

Figure 2: Flow-diagram of the Finite-Element-Analysis of rotary swaging process
Figure 2: Flow-diagram of the Finite-Element-Analysis of rotary swaging process