The Pathology of PM HIP Duplex Stainless Steels

The Pathology of PM HIP Duplex Stainless Steels

Tomas Berglund, Björn-Olof Bengtsson, Jan-Olof Nilsson

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Abstract. Tests were conducted to simulate possible issues in manufacturing of Powder Metallurgical HIPed Duplex Stainless Steels. Root causes, and consequences are analyzed and discussed from a manufacturing, metallurgical and properties point of view. The results highlight the importance of material understanding and good process control when manufacturing these alloys. While some issues are unique to PM HIP material, many of them can also be found in conventional wrought materials e.g., sigma phase and nitride precipitation. In addition, the findings in this study puts into question limitations stated in some specifications for this process and alloys. The findings show the importance of staying within these limitations but also show that some aspects are not as critical. The majority of these specifications are based on forging specifications that might result in unnecessary limitations on the PM HIP process and materials. This while not necessarily ensuring material quality or possibly limiting material use.

Powder Metallurgy, PM, Hot Isostatic Pressing, HIP, Duplex Stainless Steel, DSS, Super Duplex Stainless Steel, SDSS

Published online 12/8/2023, 6 pages
Copyright © 2023 by the author(s)
Published under license by Materials Research Forum LLC., Millersville PA, USA

Citation: Tomas Berglund, Björn-Olof Bengtsson, Jan-Olof Nilsson, The Pathology of PM HIP Duplex Stainless Steels, Materials Research Proceedings, Vol. 38, pp 29-34, 2023


The article was published as article 5 of the book Hot Isostatic Pressing

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