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Fatigue assessment by applying the highly stressed volume approach and complementary mechanical properties

Fatigue and mechanical properties
: Haberlick, Etienne; Lipp, Klaus

European Powder Metallurgy Association -EPMA-:
Euro PM 2015 Congress & Exhibition : 4 - 7 October 2015, Reims, France; Proceedings USB
Stockholm: EPMA, 2015
ISBN: 978-1-899072-47-7
6 pp.
International Powder Metallurgy Congress and Exhibition (Euro PM) <2015, Reims>
Conference Paper
Fraunhofer LBF ()
fatigue assessment; highly stressed volume; mechanical property

The use of PM materials is rapidly expanding concentrating more and more on highly loaded structural parts such as synchronizer hubs, gears, sprockets or shifting forks. Several papers, presented during the last years on PM-conferences have confirmed the highly stressed volume concept as an excellent method to assess the local durability in sharp notched areas considering the local properties of the material and stress gradients. Based on the method of highly stressed volume (HSV) this paper presents an approach to estimate the local durability by simply determinable static material properties including sinter-hardened condition. For this purpose, results of fatigue strength tests under axial, bending and torsion alternating loading (R = -1) with up to six different specimen geometries, three different sinter alloys and two different densities will be analysed in order to estimate the endurable fatigue strength in correlation with the highly stressed volume.