Holistic alloy design of medium manganese steels for press hardening - Increasing The Scope By The Environmental Perspective
Gramlich, Alexander; Naber, H.; Jeyaraj, V.; Chakraborty, Anindita; Salgın, Bekir; Rana, Radhakanta; Bleck, Wolfgang; Krupp, Ulrich
- Publisher
- Zenodo
- Language
- en
Abstract
Medium manganese steels (MMnS) with relatively low manganese concentrations (4-5 wt.%) are the most promising candidates for industrialisation. These alloys areespecially interesting for press hardening, as in comparison to the currently used manganese-boron steels, MMnS enable lower austenitization temperatures, whichwill lead to energy savings and reduced CO2-emission. However, due to the transformation kinetics, the process window for the reheating temperature is ratherlow, which might cause problems during industrialisation due to large variations in achieved phase fractions and final properties. Unfortunately, the high additions ofalloying elements increase the environmental impact in comparison to the reference steels, which offsets the savings from the modified process.This investigation presents a design approach to widen the process window by alloy design. For this matter, CALPHAD methods are combined with life cycle assessment(LCA) approach to directly analyse the environmental impact of potential compositions. It is demonstrated that a broadening of the process window for intercritical annealing can be achieved by adjusting the chemical composition. In addition, the material design is amended by analysing the translation of the environmental dimensions, already considered in the laboratory phase, to the industrial scale.This research is funded by the European Union under the RFCS project WarP–Grant Nº 101112425.
Full text
Organizers December 17-19, 2024 6th International Conference on Medium and High Manganese Steels E-PROGRAMME Hong Kong Convention and Exhibition Centre
December 17-19, 2024 6th International Conference on Medium and High Manganese Steels TABLE OF CONTENTS Welcome Messages Committees Exhibition & Floor Plan Conference Information Programme Faculties Abstracts for Plenary Lectures Abstracts for Keynote Lectures Abstracts for Invited Lectures Abstracts for Oral Presentations List of Poster Presentations Acknowledgement 1 2 4 5 7 13 16 20 39 62 105 106
6th International Conference on Medium and High Manganese Steels 43 ABSTRACTS FOR INVITED LECTURES Invited Lecture Holistic Alloy Design of MMnS for Presshardening - Increasing the Scope by the Environmental Perspective Dr.-Ing. Alexander Gramlich Steel Institute Of Rwth Aachen University Germany Medium manganese steels (MMnS) with relatively low manganese concentrations (45 wt.%) are the most promising candidates for industrialisation. These alloys are especially interesting for press hardening, as in comparison to the currently used manganese-boron steels, MMnS enable lower austenitization temperatures, which will lead to energy savings and reduced CO2-emission. However, due to the transformation kinetics, the process window for the reheating temperature is rather low, which might cause problems during industrialisation due to large variations in achieved phase fractions and final properties. Unfortunately, the high additions of alloying elements increase the environmental impact in comparison to the reference steels, which offsets the savings from the modified process. This investigation presents a design approach to widen the process window by alloy design. For this matter, CALPHAD methods are combined with life cycle assessment (LCA) approach to directly analyse the environmental impact of potential compositions. It is demonstrated that a broadening of the process window for intercritical annealing can be achieved by adjusting the chemical composition. In addition, the material design is amended by analysing the translation of the environmental dimensions, already considered in the laboratory phase, to the industrial scale. This research is funded by the European Union under the RFCS project WarP–Grant Nº 101112425.
