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VERSION:2.0
METHOD:PUBLISH
BEGIN:VEVENT
ORGANIZER;CN=ESTAD 2023:mailto:info@metec-estad.com
LOCATION:Room 16a
SUMMARY:Description of inclusion population in a high-speed steel produced via powder metallurgy
DESCRIPTION:Tool steels produced by the powder metallurgy (PM) route are increasingly crucial in processing other materials. Considering the high demands on their mechanical properties, steel cleanness is an essential aspect. The overall cleanness in PM steels is already very high, making a reliable characterization challenging due to the rare appearance of non-metallic inclusions. However, a comprehensive characterization of non-metallic inclusions present in the steel matrix at different process steps is indispensable to improve steel performance further.
This study analyzes the microscopic cleanness of a classic PM high-speed steel using manual and automated SEM/EDS measurements and chemical extractions. The size, number, morphology and chemical composition of the non-metallic inclusions are illustrated in detail. High Cycle Fatigue Tests (HCF) allow the determination of inclusions in the mesoscopic size range. Additionally, based on the data of automated SEM/EDS measurements, the maximum expected inclusion diameter in the samples is predicted using Generalized Pareto Distribution (GPD) – a statistical method of extreme value theory. The results of the various methods are compared. Combining these different approaches enables a clear description of the overall cleanness. A clear relation between the microscopic and the mesoscopic inclusion population in the investigated steel is observed, providing an essential basis for further process optimization.

CLASS:PUBLIC
DTSTART:20230614T151000
DTEND:20230614T153000
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