On the Cryogenic Treatment of Austempered Grey Cast Iron
Schenk O, Teichmann F, Müller S, Broeckmann C (2026)
Publication Language: English
Publication Status: In review
Publication Type: Unpublished / Preprint
Future Publication Type: Journal article
Publication year: 2026
URI: https://ssrn.com/abstract=7320856
DOI: 10.2139/ssrn.7320856
Abstract
Grey cast iron is a common, cost-efficient engineering material used in a wide range of technical applications due to its favourable mechanical properties including good wear resistance and high compressive strength. This investigation focuses on the development of a novel combination of austempering and cryogenic treatment of lamellar cast iron, aiming to enhance its mechanical properties. For this purpose, two materials with differing chemical compositions were casted as Y-block specimens and were subjected to austempering at five different temperatures followed by a cryogenic treatment. The microstructure, the graphite morphology, the hardness and the compressive strength of all specimens were investigated systematically. For the first material, a notable increase of hardness and compressive yield limit by approximately 50% respectively 60% compared to the as-cast condition was found, which is attributed to the presence of newly formed martensite. This was consistently proven by dilatometry, Electron Backscatter Diffraction (EBSD) and Transmission Kikuchi Diffraction (TKD), with the latter revealing martensitic regions being located close to phosphides and acicular ferrite. Contrarily, the second material exhibits a negligible effect by cryogenic treatment, which is attributed to a finer austenitic grain size, which suppresses the phase transformation.
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Germany (DE)How to cite
APA:
Schenk, O., Teichmann, F., Müller, S., & Broeckmann, C. (2026). On the Cryogenic Treatment of Austempered Grey Cast Iron. (Unpublished, In review).
MLA:
Schenk, Oliver, et al. On the Cryogenic Treatment of Austempered Grey Cast Iron. Unpublished, In review. 2026.
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