Gigacycle Fatigue Behaviour of Sintered WC-Co Hardmetals Investigated by Ultrasonic Resonance Testing-Reference-Cited by-同舟云学术

Gigacycle Fatigue Behaviour of Sintered WC-Co Hardmetals Investigated by Ultrasonic Resonance Testing

Published:2015-07 Issue: Volume:825-826 Page:1016-1023
ISSN:1662-9752
Container-title:Materials Science Forum
language:
Short-container-title:MSF

Author:

Betzwar Kotas Agnieszka¹,Weiss Brigitte²,Danninger Herbert¹

Affiliation:

1. Vienna University of Technology

2. University of Vienna

Abstract

Hardmetals, manufactured from powders by pressing and sintering, are the most important tool materials in service today. In many applications, such as milling or percussion drilling, they are subjected to fatigue with considerable loading cycle numbers. In the present study, the fatigue behaviour of hardmetals in push-pull loading was investigated up to Nmax= 1010using ultrasonic resonance fatigue testing. It showed that with all hardmetal grades investigated there is no fatigue “limit”, i.e. a horizontal branch of the S-N curve, but a consistent drop of the curve up to maximum N. Crack initiation was found to occur predominantly microstructure-controlled, as compared to defect controlled as typical for powder metallurgy tool steels.Keywords: gigacycle fatigue, WC-Co hardmetals, ultrasonic fatigue testing, fatigue limit

Publisher

Trans Tech Publications, Ltd.

Subject

Mechanical Engineering,Mechanics of Materials,Condensed Matter Physics,General Materials Science

Link

https://www.scientific.net/MSF.825-826.1016.pdf

Reference18 articles.

1. H.E. Exner, Physical and chemical nature of cemented carbides, Int Met Rev; 4; (1979) 149–73.

2. B. Roebuck, Terminology, Testing, Properties, Imaging and Models for Fine Grained Hardmetals; Int J Refract Met Hard Materials; 13; (1995); 265–79.

3. M. Gee, A. Gant, B. Roebuck, K.P. Mingard, Mechanical properties of Hardmetals, in V.K. Sarin, L. Llanes & D. Mari (Eds. ), Comprehensive Hard Materials, Vol. 1: Hardmetals. UK: Elsevier Ltd. Oxford, (2014).

4. B. Roebuck, E.A. Almond, Deformation and fracture processes and the physical metallurgy of WC-Co hardmetals, International Materials Review, 33, (1988); 90–110.

5. A.V. Shatov, S.S. Ponomarev, S.A. Firstov, Fracture and Strength of Hardmetals at Room Temperature, in V. K. Sarin, L. Llanes & D. Mari (Eds. ), Comprehensive Hard Materials, Vol. 1: Hardmetals. UK: Elsevier Ltd. Oxford, (2014).