TY - CHAP A1 - Bambach, Markus A1 - Imran, Muhammad A1 - Buhl, Johannes A1 - Härtel, Sebastian A1 - Awiszus, Birgit ED - Szeliga, Danuta ED - Rauch, Łukasz T1 - Towards intelligent materials testing with reduced experimental effort for hot forming T2 - KomPlasTech 2017 : XXIV International Conference on Computer Methods in Materials Technology, January 15-18, 2017, Zakopane, Poland : book of abstracts KW - Intelligent materials testing KW - Hot working Y1 - 2017 SN - 978-83-947091-0-5 SP - 72 EP - 73 PB - AKNET-PRess CY - Krakow ER - TY - GEN A1 - Israr, Rameez A1 - Buhl, Johannes A1 - Härtel, Sebastian A1 - Bambach, Markus T1 - Reinforcement of Tooling Using Residual Stresses Generated by Cladding by Arc Welding T2 - Metals N2 - Cladding is typically used to protect components from wear and corrosion while also improving the aesthetic value and reliability of the substrate. The cladding process induces significant residual stresses due to the temperature difference between the substrate and the clad layer. However, these residual stresses could be effectively utilized by modifying processes and geometrical parameters. This paper introduces a novel methodology for using the weld-cladding process as a cost-effective alternative to various existing reinforcement techniques. The numerical analyses are performed to maximize the reinforcement of a cylindrical tool. The investigation of how the weld cladding develops compressive stresses on the specimen in response to a change in the weld beads and the welding sequence is presented. For the benchmark shape, experimental verification of the numerical model is performed. The influence of the distance between the weld beads and the effect of the tool diameter is numerically investigated. Furthermore, the variation in compressive stresses due to temperature fluctuations during the extrusion process has been evaluated. The results showed that adequate compressive stresses are generated on the welded parts through the cladding process after cooling. More compressive stresses are induced in the tool as the cross-section of the weld bead is increased. Furthermore, keeping a gap between the adjacent beads improves tool reinforcement. Hence, the targeted reinforcement of the substrate can be achieved by optimizing the welding sequence and process parameters. KW - Additive Manufacturing (AM) KW - Wire Arc Additive Manufacturing (WAAM) KW - weld cladding KW - residual stresses KW - reinforcement KW - hole drilling method KW - LS-Dyna KW - numerical simulation Y1 - 2022 U6 - https://doi.org/10.3390/met12060984 SN - 2075-4701 VL - 12 IS - 6 ER - TY - GEN A1 - Sydow, Benjamin A1 - Jhanji, Avantika A1 - Hälsig, André A1 - Buhl, Johannes A1 - Härtel, Sebastian T1 - The Benefit of the Process Combination of Wire Arc Additive Manufacturing (WAAM) and Forming—A Numerical and Experimental Study T2 - Metals KW - WAAM KW - forming KW - process combination KW - simulation KW - recrystallization KW - hardness KW - heat treatment cycle KW - fine grained mild steel KW - microstructure evolution Y1 - 2022 U6 - https://doi.org/10.3390/met12060988 SN - 2075-4701 VL - 12 IS - 6 ER - TY - GEN A1 - Ertugrul, Gökhan A1 - Hälsig, Andre A1 - Hensel, Jonas A1 - Buhl, Johannes A1 - Härtel, Sebastian T1 - Efficient Multi-Material and High Deposition Coating including Additive Manufacturing by Tandem Plasma Transferred Arc Welding for Functionally Graded Structures T2 - Metals KW - additive manufacturing powder KW - 3D Plasma Metal Deposition (3DPMD) KW - austenitic stainless steel KW - super-duplex stainless steel KW - multi-material KW - functionally graded KW - high deposition rate KW - arc KW - powder Y1 - 2022 U6 - https://doi.org/10.3390/met12081336 SN - 2075-4701 VL - 12 IS - 8 SP - 1 EP - 17 ER - TY - GEN A1 - Hart-Rawung, Thawin A1 - Buhl, Johannes A1 - Härtel, Sebastian A1 - Bambach, Markus T1 - Intelligent Iterative Experimental Design to Achieve Maximum Model Quality for Phase Change of 22MnB5 T2 - Key Engineering Materials Y1 - 2022 U6 - https://doi.org/https://doi.org/10.4028/p-0cnty5 VL - 926 SP - 2031 EP - 2039 PB - Verlag Trans Tech Publications Ltd ER - TY - GEN A1 - Besong, Lemopi Isidore A1 - Buhl, Johannes A1 - Härtel, Sebastian A1 - Bambach, Markus T1 - Increasing the Forming Limits in Hole Flanging of Dual-Phase (DP) 1000 Steel Using Punch Rotation T2 - Key Engineering Materials KW - Frictional Heat KW - High Formability KW - Hole Flanging KW - Punch Rotation Y1 - 2022 U6 - https://doi.org/10.4028/p-06y8un SN - 1662-9795 VL - Vol. 926 SP - 717 EP - 723 ER - TY - GEN A1 - Jensch, Felix A1 - Buhl, Johannes A1 - Laue, Robert A1 - Härtel, Sebastian T1 - Application of the plane-strain-compression-test to determine the local mechanical properties of LPBF-manufactured 316l components T2 - Material Forming: The 26th International ESAFORM Conference on Material Forming, Kraków, Poland, April 19-21, 2023 KW - LPBF-Process, Local Properties, Plane-Strain-Compression-Test Y1 - 2023 U6 - https://doi.org/10.21741/9781644902479-17 VL - 28 SP - 149 EP - 149 ER - TY - GEN A1 - Alimov, Artem A1 - Härtel, Sebastian A1 - Buhl, Johannes A1 - Gardill, Markus A1 - Knaack, Marcus T1 - Erfassung von Pressen­ver­formungen mit Radarsensoren T2 - wt Werkstattstechnik Y1 - 2023 U6 - https://doi.org/10.37544/1436-4980-2023-10-47 SN - 1436-4980 SN - 1436-5006 VL - 113 IS - 10 SP - 425 EP - 431 ER - TY - GEN A1 - Buhl, Johannes A1 - Härtel, Sebastian A1 - Besong, Lemopi Isidore ED - Mocellin, Katia T1 - Temperature Control of the Two-Point Incremental Forming Process to Achieve Homogeneous Martensite Content Based on Finite Element Simulations T2 - Proceedings of the 14th International Conference on the Technology of Plasticity - Current Trends in the Technology of Plasticity, ICTP 2023 - Volume 1 N2 - Deformation-induced martensite has been observed in the incremental sheet forming of metastable austenitic stainless steels (MASS). The presence of martensite improves the characteristics of the springs. Martensite transformation usually occurs at low temperatures (<70 ℃). Depending on the tool speed, incremental forming of disk springs requires between 3 to 5 min. The forming time needs to be short to increase the process output in industrial settings. However, accelerating the process leads to high temperatures above the martensite transformation temperature that suppress martensite formation, necessitating temperature control during forming. It is suggested to enhance the martensite content of the blank by cooling during the forming operation. In this contribution, two-point incremental sheet forming is conducted to determine the influence of process temperature on the phase content of MASS disk springs. A temperature-dependent phase change material model that includes the strain rate effect is implemented in finite element (FE) simulations to predict the martensite content. FE simulations are performed to investigate the convection coefficients and cooling time leading to process temperatures below 70 ℃. The framework can be used to control and speed up the incremental forming of disk springs while maintaining a high martensite content. Y1 - 2023 SN - 978-3-031-41022-2 SN - 978-3-031-41023-9 U6 - https://doi.org/10.1007/978-3-031-41023-9_74 SN - 2195-4356 SP - 739 EP - 747 PB - Springer CY - Cham ER -