WIT Press


Influence Of Local Damage On The Creep Behaviour Of High Speed Steels

Price

Free (open access)

Paper DOI

10.2495/FR980471

Volume

19

Pages

11

Published

1998

Size

1,610 kb

Author(s)

C. Broeckmann, H.F. Hinz & R. Pandorf

Abstract

High speed steels are investigated as to their short term creep behaviour. In uniaxial creep tests under constant stress a distinct influence of the distribution of primary and eutectic carbides on the creep curve was found. Micrographs show the developement of local damage due to carbide cleavage even in the early stage of the test. The creep deformation was numerically modelled by use of FEM on a microscopical scale. The role of particle arrangement and local damage was investigated by numerical studies. 1 Introduction Tool materials for applications in the temperature range up to 650 °C have to show excellent creep strength, high wear resistance and sufficient resistance to thermal fatigue. An investigation [1] showed that under certain conditions

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