Material-property correlations for a high-alloy special steel

Abstract

Abstract Using the example of the high-alloy austenitic steel 1.4828 (X15CrNiSi20-12), which is typically used for high-temperature applications, this paper will demonstrate how the performance characteristics of semi-finished products are impacted by the condition of a material after production and processing. For this purpose, samples of a cost-effective as-cast condition and a comparatively expensive as-forged condition were studied in a comparative approach. The microstructure was examined by means of light optical as well as scanning electron microscopy, hardness values were determined, and the corrosion behavior was characterized by electrochemical investigations. The comparative studies show that despite an almost identical chemical composition, both the as-fabricated and as-processed conditions of a material have a decisive impact on the performance characteristics, particularly on corrosion behavior.