Process Investigation of Tube Expansion by Gas Detonation
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Date
2006
Journal Title
Journal ISSN
Volume Title
Publisher
Institut für Umformtechnik - Technische Universität Dortmund
Abstract
The present paper deals with the expansion of tubes by direct application of gas
detonation waves, i.e. the gas is both pressure medium and energy source. After an introduction to gas detonation forming, measurements of the motion process and the internal pressures are presented. Results of free expansion and of forming into a die are thoroughly studied and compared to the results of quasi-static burst tests and hydroforming. Using pure aluminum Al99.5 and a medium strength alloy AlMgSi1, expansions by 25 % and 20 % respectively are obtained. A simulation delivers details on the deformation process and specially prepared probes of high-speed tension tests give new insight into metallographic material behavior at different strain rates.
Description
Table of contents
Keywords
forming, shock wave, tube