Among several competing mass-production methods powder metallurgy plays an important role not only as a material and energy saving alternative but also as a technique, delivering materials with good fatigue properties which are therefore able to substitute conventional materials. However, it is necessary to understand the interaction between strength behaviour and design-determining inputs, like service loading, component geometry, and manufacturing. This paper presents for different PM' steels design relevant material data like S-N curves, effect of notches and mean stresses and fracture mechanical properties. The influence of different manufacturing parameters like alloy composition, density, sintering temperature, post sintering, mechanical and thermal surface treatments as well as heat treatments on the fatigue properties of sintered steels is discussed. The necessity to determine material properties under different loading modes, i.e. axial, bending, different mean stresses, stress concentrations and gradients, is outlined against the background of different service conditions, component geometries and design.
PM steels for heavy duty automotive components
Sinterstähle für stark belastete Automobilkomponenten
Autotech, Autotech, 1991 ; 1-9
1991
9 Seiten, 22 Bilder, 21 Quellen
Aufsatz (Konferenz)
Englisch
Konstruktionsmethodik , Automobilindustrie , Oberflächenbehandlung , Sintermetall , Pulvermetallurgie , Materialeigenschaft , Materialermüdung , Sintern , Legierung , Dichte (Masse) , Betriebsbeanspruchung , Massenproduktion , Bruchmechanik , Dimensionierung , mechanische Eigenschaft , Ermüdung , Betriebsbedingung
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