Effects of Carbide Size on Fatigue Properties of P/M High-Speed Steel

Several P/M (Powder Metallurgy) high-speed steels with different sizes of carbide particles, which is one of the predominant factors influencing wear properties, strength etc., were prepared. In the plain fatigue tests, the plain fatigue strength of the specimen with large carbide particles was lowe...

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Veröffentlicht in:TRANSACTIONS OF THE JAPAN SOCIETY OF MECHANICAL ENGINEERS Series A 1993/10/25, Vol.59(566), pp.2213-2219
Hauptverfasser: Nishida, Tomohisa, Mutoh, Yoshiharu, Tsujii, Nobuhiro
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container_issue 566
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container_title TRANSACTIONS OF THE JAPAN SOCIETY OF MECHANICAL ENGINEERS Series A
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creator Nishida, Tomohisa
Mutoh, Yoshiharu
Tsujii, Nobuhiro
description Several P/M (Powder Metallurgy) high-speed steels with different sizes of carbide particles, which is one of the predominant factors influencing wear properties, strength etc., were prepared. In the plain fatigue tests, the plain fatigue strength of the specimen with large carbide particles was lower than that with small carbide particles. This result is obtained because fatigue cracks are initiated at carbide particles. In fretting fatigue tests, the fretting fatigue strength decreased with increasing carbide particle size. This is mainly because the frictional coefficient of the materials decreased with decreasing carbide particle size. According to the results of the fatigue crack growth tests, the carbide particle has no significant influence on the fatigue crack growth rate. The predicted lives based on the fracture mechandcs model of fretting fatigue were in good agreement with the experimental results.
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In the plain fatigue tests, the plain fatigue strength of the specimen with large carbide particles was lower than that with small carbide particles. This result is obtained because fatigue cracks are initiated at carbide particles. In fretting fatigue tests, the fretting fatigue strength decreased with increasing carbide particle size. This is mainly because the frictional coefficient of the materials decreased with decreasing carbide particle size. According to the results of the fatigue crack growth tests, the carbide particle has no significant influence on the fatigue crack growth rate. 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source J-STAGE Free; Elektronische Zeitschriftenbibliothek - Frei zugängliche E-Journals
subjects Carbide Size
Fatigue
Fatigue Crack Growth
Fatigue Life Prediction
Fracture Mechanics
Fretting Fatigue
High-Speed Steel
title Effects of Carbide Size on Fatigue Properties of P/M High-Speed Steel
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