--- _id: '49430' abstract: - lang: eng text: Within the current energy and environmental crisis, new material- and energy-saving processes are needed. For this reason, this study focuses on the development of a new forming technology for Ti-6Al-4V sheet metal. It is based on combination of solution treatment by resistive heating with rapid tool-based quenching and subsequent annealing. This new “TISTRAQ” process is comparable with press-hardening already known for steels and hot die quenching known for aluminium alloys. One of the main influencing factors for this process is the heat transfer coefficient (HTC). It is an important driver for adjustment of basic parameters, as selection of tool material or the forming speed but also plays an important role while elaborating temperature distribution in the numerical model. Therefore, a new and unique test rig was developed to determine the HTC and to perform tool-based heat treatment at specimen level under laboratory conditions. The test rig was used to investigate the influence of the titanium-tool-lubricant system on HTC and cooling rate. Further the effect of heat treatment in the test rig and tool-based quenching on microstructure and mechanical properties was studied. To improve the prediction of the temperature distribution of the titanium during cooling, the HTC was integrated into the numerical process simulation author: - first_name: Maximilian Alexander full_name: Kaiser, Maximilian Alexander id: '72351' last_name: Kaiser orcid: 0009-0008-1333-3396 - first_name: Fabian full_name: Höschen, Fabian last_name: Höschen - first_name: Nina full_name: Pfeffer, Nina last_name: Pfeffer - first_name: Mathias full_name: Merten, Mathias last_name: Merten - first_name: Thomas full_name: Meyer, Thomas last_name: Meyer - first_name: Thorsten full_name: Marten, Thorsten id: '338' last_name: Marten orcid: 0009-0001-6433-7839 - first_name: Pawel full_name: Rockicki, Pawel last_name: Rockicki - first_name: Heinz Werner full_name: Höppel, Heinz Werner last_name: Höppel - first_name: Thomas full_name: Tröster, Thomas id: '553' last_name: Tröster citation: ama: 'Kaiser MA, Höschen F, Pfeffer N, et al. The new TISTRAQ process: Solution treatment with rapid quenching and annealing for Ti-6Al-4V sheet metal part forming - investigation on heat transfer coefficient and influence on cooling rates. In: IOM3. Chapter 14: Forming, Machining & Joining [Version 1; Not Peer Reviewed]. ; 2024. doi:doi.org/10.7490/f1000research.1119929.1' apa: 'Kaiser, M. A., Höschen, F., Pfeffer, N., Merten, M., Meyer, T., Marten, T., Rockicki, P., Höppel, H. W., & Tröster, T. (2024). The new TISTRAQ process: Solution treatment with rapid quenching and annealing for Ti-6Al-4V sheet metal part forming - investigation on heat transfer coefficient and influence on cooling rates. IOM3. Chapter 14: Forming, Machining & Joining [Version 1; Not Peer Reviewed]. 15th World Conference on Titanium, Edinburgh. https://doi.org/doi.org/10.7490/f1000research.1119929.1' bibtex: '@inproceedings{Kaiser_Höschen_Pfeffer_Merten_Meyer_Marten_Rockicki_Höppel_Tröster_2024, title={The new TISTRAQ process: Solution treatment with rapid quenching and annealing for Ti-6Al-4V sheet metal part forming - investigation on heat transfer coefficient and influence on cooling rates}, DOI={doi.org/10.7490/f1000research.1119929.1}, booktitle={IOM3. Chapter 14: Forming, Machining & Joining [version 1; not peer reviewed]}, author={Kaiser, Maximilian Alexander and Höschen, Fabian and Pfeffer, Nina and Merten, Mathias and Meyer, Thomas and Marten, Thorsten and Rockicki, Pawel and Höppel, Heinz Werner and Tröster, Thomas}, year={2024} }' chicago: 'Kaiser, Maximilian Alexander, Fabian Höschen, Nina Pfeffer, Mathias Merten, Thomas Meyer, Thorsten Marten, Pawel Rockicki, Heinz Werner Höppel, and Thomas Tröster. “The New TISTRAQ Process: Solution Treatment with Rapid Quenching and Annealing for Ti-6Al-4V Sheet Metal Part Forming - Investigation on Heat Transfer Coefficient and Influence on Cooling Rates.” In IOM3. Chapter 14: Forming, Machining & Joining [Version 1; Not Peer Reviewed], 2024. https://doi.org/doi.org/10.7490/f1000research.1119929.1.' ieee: 'M. A. Kaiser et al., “The new TISTRAQ process: Solution treatment with rapid quenching and annealing for Ti-6Al-4V sheet metal part forming - investigation on heat transfer coefficient and influence on cooling rates,” presented at the 15th World Conference on Titanium, Edinburgh, 2024, doi: doi.org/10.7490/f1000research.1119929.1.' mla: 'Kaiser, Maximilian Alexander, et al. “The New TISTRAQ Process: Solution Treatment with Rapid Quenching and Annealing for Ti-6Al-4V Sheet Metal Part Forming - Investigation on Heat Transfer Coefficient and Influence on Cooling Rates.” IOM3. Chapter 14: Forming, Machining & Joining [Version 1; Not Peer Reviewed], 2024, doi:doi.org/10.7490/f1000research.1119929.1.' short: 'M.A. Kaiser, F. Höschen, N. Pfeffer, M. Merten, T. Meyer, T. Marten, P. Rockicki, H.W. Höppel, T. Tröster, in: IOM3. Chapter 14: Forming, Machining & Joining [Version 1; Not Peer Reviewed], 2024.' conference: end_date: 2023-06-16 location: Edinburgh name: 15th World Conference on Titanium start_date: 2023-06-12 date_created: 2023-12-04T10:00:21Z date_updated: 2025-05-19T11:46:47Z department: - _id: '9' - _id: '321' - _id: '149' doi: doi.org/10.7490/f1000research.1119929.1 keyword: - Interfacial heat transfer coefficient - Ti-6Al-4V - nonisothermal forming - thermomechanical processing - TISTRAQ process language: - iso: eng publication: 'IOM3. Chapter 14: Forming, Machining & Joining [version 1; not peer reviewed]' publication_status: published quality_controlled: '1' status: public title: 'The new TISTRAQ process: Solution treatment with rapid quenching and annealing for Ti-6Al-4V sheet metal part forming - investigation on heat transfer coefficient and influence on cooling rates' type: conference user_id: '72351' year: '2024' ... --- _id: '49437' abstract: - lang: eng text: "The phase and TTT diagrams of the Ti-6Al-4V system allow the development of a new forming process for a more energy- and materialefficient production of sheet metal parts. This new “TISTRAQ” process is composed of two steps. In terms of process technology, the first step is comparable to a direct press-hardening process already well known for steels. In this step, the Ti-6Al-4V sheet material is resistively heated to a temperature below β-transus Tβ and, after a very short holding time, simultaneously formed and quenched by use of water cooled tools. Thereby, the β phase undergoes a martensitic transformation. The second step is a subsequent short-time annealing, which leads to a hardening of the material. In this work, a new test rig using resistive heating technique was used in order to produce\r\ndifferent solution treated and tool quenched (STQ) and subsequently annealed (STA) states. In this paper, the effects of heating rate, solution treatment temperature and holding time on microstructure and mechanical properties are addressed. For the characterisation, tensile testing and scanning electron microscopy were used. By the systematic variation of applied processing parameters, dominating effects on microstructure and mechanical properties were evaluated. For example, the solution treatment temperature was found to have a significant effect on microstructural features and characteristic strength and strain values. The obtained results reveal a high potential for future technical applications." author: - first_name: Nina full_name: Pfeffer, Nina last_name: Pfeffer - first_name: Maximilian Alexander full_name: Kaiser, Maximilian Alexander id: '72351' last_name: Kaiser orcid: 0009-0008-1333-3396 - first_name: Thomas full_name: Meyer, Thomas last_name: Meyer - first_name: Mathias full_name: Göken, Mathias last_name: Göken - first_name: Heinz Werner full_name: Höppel, Heinz Werner last_name: Höppel citation: ama: 'Pfeffer N, Kaiser MA, Meyer T, Göken M, Höppel HW. The new TISTRAQ process: Solution treatment with rapid quenching and annealing for Ti-6Al-4V sheet metal part forming - the effect of processing parameters on microstructure and mechanical properties. In: IOM3. Chapter 14: Forming, Machining & Joining [Version 1; Not Peer Reviewed]. doi:https://doi.org/10.7490/f1000research.1119929.1' apa: 'Pfeffer, N., Kaiser, M. A., Meyer, T., Göken, M., & Höppel, H. W. (n.d.). The new TISTRAQ process: Solution treatment with rapid quenching and annealing for Ti-6Al-4V sheet metal part forming - the effect of processing parameters on microstructure and mechanical properties. IOM3. Chapter 14: Forming, Machining & Joining [Version 1; Not Peer Reviewed]. 15th World Conference on Titanium, Edinburgh. https://doi.org/10.7490/f1000research.1119929.1' bibtex: '@inproceedings{Pfeffer_Kaiser_Meyer_Göken_Höppel, title={The new TISTRAQ process: Solution treatment with rapid quenching and annealing for Ti-6Al-4V sheet metal part forming - the effect of processing parameters on microstructure and mechanical properties}, DOI={https://doi.org/10.7490/f1000research.1119929.1}, booktitle={IOM3. Chapter 14: Forming, Machining & Joining [version 1; not peer reviewed]}, author={Pfeffer, Nina and Kaiser, Maximilian Alexander and Meyer, Thomas and Göken, Mathias and Höppel, Heinz Werner} }' chicago: 'Pfeffer, Nina, Maximilian Alexander Kaiser, Thomas Meyer, Mathias Göken, and Heinz Werner Höppel. “The New TISTRAQ Process: Solution Treatment with Rapid Quenching and Annealing for Ti-6Al-4V Sheet Metal Part Forming - the Effect of Processing Parameters on Microstructure and Mechanical Properties.” In IOM3. Chapter 14: Forming, Machining & Joining [Version 1; Not Peer Reviewed], n.d. https://doi.org/10.7490/f1000research.1119929.1.' ieee: 'N. Pfeffer, M. A. Kaiser, T. Meyer, M. Göken, and H. W. Höppel, “The new TISTRAQ process: Solution treatment with rapid quenching and annealing for Ti-6Al-4V sheet metal part forming - the effect of processing parameters on microstructure and mechanical properties,” presented at the 15th World Conference on Titanium, Edinburgh, doi: https://doi.org/10.7490/f1000research.1119929.1.' mla: 'Pfeffer, Nina, et al. “The New TISTRAQ Process: Solution Treatment with Rapid Quenching and Annealing for Ti-6Al-4V Sheet Metal Part Forming - the Effect of Processing Parameters on Microstructure and Mechanical Properties.” IOM3. Chapter 14: Forming, Machining & Joining [Version 1; Not Peer Reviewed], doi:https://doi.org/10.7490/f1000research.1119929.1.' short: 'N. Pfeffer, M.A. Kaiser, T. Meyer, M. Göken, H.W. Höppel, in: IOM3. Chapter 14: Forming, Machining & Joining [Version 1; Not Peer Reviewed], n.d.' conference: end_date: 2023-06-16 location: Edinburgh name: 15th World Conference on Titanium start_date: 2023-06-12 date_created: 2023-12-04T11:08:49Z date_updated: 2025-05-19T11:46:28Z department: - _id: '9' - _id: '321' - _id: '149' doi: https://doi.org/10.7490/f1000research.1119929.1 keyword: - Ti-6Al-4V - thermomechanical processing - resistive heating - quench-forming - process parameter-microstructure-properties relationship language: - iso: eng publication: 'IOM3. Chapter 14: Forming, Machining & Joining [version 1; not peer reviewed]' publication_status: submitted status: public title: 'The new TISTRAQ process: Solution treatment with rapid quenching and annealing for Ti-6Al-4V sheet metal part forming - the effect of processing parameters on microstructure and mechanical properties' type: conference user_id: '72351' year: '2024' ...