| dc.contributor.author | Rusz, Stanislav | |
| dc.contributor.author | Łapkowski, Wiesław | |
| dc.contributor.author | Sińczak, Jan | |
| dc.contributor.author | Bořuta, Josef | |
| dc.date.accessioned | 2007-09-12T13:20:18Z | |
| dc.date.available | 2007-09-12T13:20:18Z | |
| dc.date.issued | 1996 | |
| dc.identifier.citation | Journal of Materials Processing Technology. 1996, vol. 60, issues 1-4, p. 697-701. | en |
| dc.identifier.issn | 0924-0136 | |
| dc.identifier.uri | http://hdl.handle.net/10084/62742 | |
| dc.language.iso | en | en |
| dc.publisher | Elsevier | en |
| dc.relation.ispartofseries | Journal of Materials Processing Technology | en |
| dc.relation.uri | http://dx.doi.org/10.1016/0924-0136(96)02407-7 | en |
| dc.subject | superplastic deformation | en |
| dc.subject | torsion test | en |
| dc.subject | low and middle carbon steels | en |
| dc.title | New aspects of the plastometric tests for middle and high carbon steels in the superplastic conditions | en |
| dc.type | article | en |
| dc.identifier.location | Není ve fondu ÚK | en |
| dc.description.abstract-en | Searching for the optimum conditions of plastic deformation of some materials has to guarantee a possibility of obtaining the final shape of the product without applying additional grinding. This leads to the necessity of taking the advantage of the superplasticity effect which allows to obtain the required mechanical properties and shape of the product. The superplasticity phenomenon, investigated widely some time ago, is not completely explained. This effect is well observed in the alloys based on Al, Cu, Sn, V, Ti, Co and Fe. The alloys are divided into two groups. The first group includes average melting temperature alloys which show good workability in the superplastic conditions. The second group includes high melting temperature alloys which are of particular interest for the technologists. These alloys, however due to high temperatures and long deformation times require thermal-resistant tools.
The strain rate sensitivity parameter m is the main material parameter which determines the superplasticity. That parameter is a part of the consecutive equation which describes the relationship between the stress and the strain at high temperatures. The materials with the parameter m exceeding the value of 0.3 are considered to be superplastic. An attempt of establishing the optimum conditions of plastic deformation was undertaken using the torsion test. The tests were carried out at various temperatures and at various strains. | en |
| dc.identifier.doi | 10.1016/0924-0136(96)02407-7 | |
| dc.identifier.wos | A1996UT57300109 | |