Advanced thermomechanical flow forming: A novel approach to α’ martensite control for enhanced material properties
Bahman Arian, Werner Homberg, Lukas Kersting, Ansgar Trächtler, Julian Rozo Vasquez, Frank Walther
Abstract. Flow forming is recognized for its precision in producing rotationally symmetric components, but the use of metastable austenitic stainless steel (AISI 304L) introduces challenges due to uncontrolled strain-induced α’ martensite formation. Variations in factors such as eccentricity and batch inconsistencies lead to unpredictable microstructural profiles, limiting reproducibility [1,2]. This study addresses these issues by incorporating thermal actuators for cryogenic cooling and induction heating to regulate forming temperatures, enabling control of the α’-martensite content. Experimental investigations demonstrate that local tempering during thermomechanical reverse flow forming produces discernible variations in microstructure, affecting mechanical and magnetic properties [3]. Controlled local adjustments of α’-martensite content allow for customization of properties in seamless tubes, advancing manufacturing capabilities for complex, defect-free components. The results presented demonstrate promising strategies for implementation within the context of closed-loop property control in flow forming.
Keywords
Flow Forming, Thermomechanical Forming, α’-Martensite, Property Control
Published online 5/7/2025, 7 pages
Copyright © 2025 by the author(s)
Published under license by Materials Research Forum LLC., Millersville PA, USA
Citation: Bahman Arian, Werner Homberg, Lukas Kersting, Ansgar Trächtler, Julian Rozo Vasquez, Frank Walther, Advanced thermomechanical flow forming: A novel approach to α’ martensite control for enhanced material properties, Materials Research Proceedings, Vol. 54, pp 1167-1173, 2025
DOI: https://doi.org/10.21741/9781644903599-127
The article was published as article 127 of the book Material Forming
Content from this work may be used under the terms of the Creative Commons Attribution 3.0 license. Any further distribution of this work must maintain attribution to the author(s) and the title of the work, journal citation and DOI.
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