MATERIALS TRANSACTIONS
Online ISSN : 1347-5320
Print ISSN : 1345-9678
ISSN-L : 1345-9678
Rotating-Beam Fatigue Properties of Pd40Cu30Ni10P20 Bulk Glassy Alloy
Yoshihiko YokoyamaNobuyuki NishiyamaKenzo FukauraHisakichi SunadaYoshihiro MurakamiAkihisa Inoue
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2001 Volume 42 Issue 5 Pages 876-880

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Abstract

High-cycle fatigue strength of a Pd40Cu30Ni10P20 \\citerf1 bulk glassy alloy was examined using the rotating-beam fatigue test. The Pd40Cu30Ni10P20 bulk glassy alloy showed a distinct knee at an applied stress of 0.15 σBB: tensile strength of 1600 MPa) and a cycle number N=4×107. However, in the equal applied stress of 0.15 σB, some samples fractured over the knee cycle numbers. It is likely that the origin of the fracture is to the partial embrittled hardening resulting from crystallization or structural relaxation, which is probably caused by the thermal effect from plastic deformation region. Such a partial hardening by the thermal effect characterizes the fatigue feature of the bulk glassy alloy. It is revealed that no fatigue limit is seen on the Wöhler curve of the Pd40Cu30Ni10P20 bulk glassy alloy.

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© 2001 The Japan Institute of Metals and Materials
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