High rate material behaviour at hot forming conditions

Modern processes of hot forming use very high strain rates and large, mostly incrementally applied strains. For the simulation of such forming processes relevant material data are needed, which have to be recorded under accordant forming conditions. This places extraordinary demands on the experimen...

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Bibliographic Details
Published inMechanics of time-dependent materials Vol. 13; no. 1; pp. 49 - 62
Main Authors Meyer, Lothar W., Kuprin, Corinna, Halle, Thorsten
Format Journal Article
LanguageEnglish
Published Dordrecht Springer Netherlands 01.03.2009
Subjects
Characterization and Evaluation of Materials
Classical Mechanics
Engineering
Polymer Sciences
Solid Mechanics
Recrystallisation
Hot forming
Dynamic testing
Large strains
Torsion testing
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Summary:Modern processes of hot forming use very high strain rates and large, mostly incrementally applied strains. For the simulation of such forming processes relevant material data are needed, which have to be recorded under accordant forming conditions. This places extraordinary demands on the experimental technique, because high temperatures, high strain rates and large strains have to be implemented simultaneously. In the following contribution such an aligned experimental technique is introduced. In order to apply a very large range of strain rate, compression tests are performed using different technical equipment up to a drop tower and Hopkinson pressure bar. To reach large plastic strains, a hot torsion test was developed, which allowed true plastic shear strains up to 10 at strain rates in the order of 100 1/s at hot forming temperatures.
Bibliography:ObjectType-Article-2
SourceType-Scholarly Journals-1
ObjectType-Feature-1
content type line 23
ISSN:1385-2000
1573-2738
DOI:10.1007/s11043-008-9071-8