Authors:
Leonhard Gertlowski (Institute of Applied Powder Metallurgy and Ceramics (IAPK), Germany)
Oliver Schenk (Institute for Materials Applications in Mechanical Engineering (IWM), Germany)
Stefan Müller (Chair Materials Technology, Germany)
Santiago Benito (Chair Materials Technology, Germany)
Sebastian Weber (Chair Materials Technology, Germany)
Christoph Broeckmann (Institute for Materials Applications in Mechanical Engineering (IWM), Germany)
Abstract:
High-speed steels are commonly used for cutting tools that require a high impact toughness and fatigue resistance. Both properties are significantly enhanced by employing the powder metallurgical production (PM) route using hot isostatic pressing (HIP) as consolidation technique. The fatigue strength is conventionally assessed by Wöhler tests that imply a systematic variation of the stress amplitude in the vicinity of the presumed load limit, employing multiple specimens. However, the available test volume is limited by the size of the HIP capsule. Hence, an accelerated fatigue testing method is presented that can significantly reduce the use of material and time by determining the fatigue limit with a single specimen. This method involves the measurement of the temperature rise in a sample during a load increase test whose characteristic course indicates damage initiation. Its validity is demonstrated by the determination of the fatigue limit for HS6-5-3 employing both accelerated and conventional testing.
DOI:
https://doi.org/10.59499/EP256767866
