@misc{ImranAfzalBambach, author = {Imran, Muhammad and Afzal, Muhammad Junaid and Bambach, Markus}, title = {Analysis of competition between onset of dynamic recrystallization and damage nucleation during hot forming}, series = {NUMIFORM 2019: The 13th International Conference on Numerical Methods in Industrial Forming Processes}, journal = {NUMIFORM 2019: The 13th International Conference on Numerical Methods in Industrial Forming Processes}, isbn = {978-0-87339-769-8}, pages = {231 -- 234}, language = {en} } @misc{ImranSzyndlerAfzaletal., author = {Imran, Muhammad and Szyndler, Joanna and Afzal, Muhammad Junaid and Bambach, Markus}, title = {Dynamic recrystallization-dependent damage modeling during hot forming}, series = {International Journal of Damage Mechanics}, volume = {29}, journal = {International Journal of Damage Mechanics}, number = {2}, issn = {1530-7921}, doi = {10.1177/1056789519848477}, pages = {335 -- 363}, language = {en} } @misc{ImranSzyndlerAfzaletal., author = {Imran, Muhammad and Szyndler, Joanna and Afzal, Muhammad Junaid and Bambach, Markus}, title = {Towards the damage evolution for hot forming processes using Gurson-Tvergaard Needleman model - Coupled to dynamic recrystallization}, series = {AIP Conference Proceedings}, volume = {2113}, journal = {AIP Conference Proceedings}, number = {1}, isbn = {978-0-7354-1847-9}, doi = {10.1063/1.5112741}, language = {en} } @misc{ImranAfzalBuhletal., author = {Imran, Muhammad and Afzal, Muhammad Junaid and Buhl, Johannes and Bambach, Markus and Dunlap, Anthony and Schwedt, Alexander and Aretz, Anke and Wang, Shuhan and Lohmar, Johannes and Hirt, Gerhard}, title = {Evaluation of process-induced damage based on dynamic recrystallization during hot caliber rolling}, series = {Production Engineering}, volume = {14}, journal = {Production Engineering}, number = {1}, issn = {1863-7353}, doi = {10.1007/s11740-019-00932-0}, pages = {5 -- 16}, language = {en} } @inproceedings{BambachImranBuhletal., author = {Bambach, Markus and Imran, Muhammad and Buhl, Johannes and H{\"a}rtel, Sebastian and Awiszus, Birgit}, title = {Towards intelligent materials testing with reduced experimental effort for hot forming}, series = {KomPlasTech 2017 : XXIV International Conference on Computer Methods in Materials Technology, January 15-18, 2017, Zakopane, Poland : book of abstracts}, booktitle = {KomPlasTech 2017 : XXIV International Conference on Computer Methods in Materials Technology, January 15-18, 2017, Zakopane, Poland : book of abstracts}, editor = {Szeliga, Danuta and Rauch, Łukasz}, publisher = {AKNET-PRess}, address = {Krakow}, isbn = {978-83-947091-0-5}, pages = {72 -- 73}, language = {en} } @misc{ImranBambach, author = {Imran, Muhammad and Bambach, Markus}, title = {A new model for dynamic recrystallization under hot working conditions based on critical dislocation gradients}, series = {Procedia Engineering}, volume = {207}, journal = {Procedia Engineering}, issn = {1877-7058}, doi = {10.1016/j.proeng.2017.10.1111}, pages = {2107 -- 2112}, language = {en} } @misc{ImranKuehbachRotersetal., author = {Imran, Muhammad and K{\"u}hbach, Markus and Roters, Franz and Bambach, Markus}, title = {Development of a Model for Dynamic Recrystallization Consistent with the Second Derivative Criteron}, series = {Materials (Basel)}, volume = {10}, journal = {Materials (Basel)}, number = {11}, issn = {1996-1944}, doi = {10.3390/ma10111259}, pages = {18}, language = {en} } @misc{ImranBambach, author = {Imran, Muhammad and Bambach, Markus}, title = {Towards the damage evaluation using Gurson-Tvergaard-Needleman (GTN) model for hot forming processes}, series = {Proceedings of the 21st International ESAFORM Conference on Material Forming, ESAFORM 2018, Palermo, Italy, 23-25 April 2018}, journal = {Proceedings of the 21st International ESAFORM Conference on Material Forming, ESAFORM 2018, Palermo, Italy, 23-25 April 2018}, editor = {Fratini, Livan and Di Lorenzo, Rosa and Buffa, Gianluca and Ingarao, Guiseppe}, publisher = {AIP Publishing}, address = {Melville, New York}, isbn = {978-0-7354-1663-5}, doi = {10.1063/1.5035063}, language = {en} } @misc{BambachImran, author = {Bambach, Markus and Imran, Muhammad}, title = {Extended Gurson-Tvergaard-Needleman model for damage modeling and control in hot forming}, series = {Cirp Annals - Manufacturing Technology}, volume = {68}, journal = {Cirp Annals - Manufacturing Technology}, number = {1}, issn = {0007-8506}, doi = {10.1016/j.cirp.2019.04.063}, pages = {249 -- 252}, language = {en} } @misc{BambachImranSizovaetal., author = {Bambach, Markus and Imran, Muhammad and Sizova, Irina and Buhl, Johannes and Gerster, Stephan and Herty, Michael}, title = {A soft sensor for property control in multi-stage hot forming based on a level set formulation of grain size evolution and machine learning}, series = {Advances in Industrial and Manufacturing Engineering}, journal = {Advances in Industrial and Manufacturing Engineering}, number = {2}, issn = {2666-9129}, doi = {10.1016/j.aime.2021.100041}, pages = {13}, language = {en} } @misc{BambachHertyImran, author = {Bambach, Markus and Herty, Michael and Imran, Muhammad}, title = {Feedback stabilization of forming processes}, series = {arXiv}, journal = {arXiv}, language = {en} } @misc{BambachGersterHertyetal., author = {Bambach, Markus and Gerster, Stephan and Herty, Michael and Imran, Muhammad}, title = {Feedback control for random, linear hyperbolic balance laws}, series = {International Journal for Uncertainty Quantification}, volume = {12}, journal = {International Journal for Uncertainty Quantification}, number = {2}, issn = {2152-5099}, doi = {10.1615/Int.J.UncertaintyQuantification.2021037183}, pages = {81 -- 104}, language = {en} } @misc{ImranDeillonSizovaetal., author = {Imran, Muhammad and Deillon, L{\´e}a and Sizova, Irina and Neirinck, Bram and Bambach, Markus}, title = {Process optimization and study of the co-sintering behaviour of Cu-Ni multi-material 3D structures fabricated by spark plasma sintering (SPS)}, series = {Materials \& Design}, volume = {Vol. 223}, journal = {Materials \& Design}, issn = {0264-1275}, doi = {10.1016/j.matdes.2022.111210}, language = {en} } @misc{SafariImranWeiss, author = {Safari, Athar and Imran, Muhammad and Weiss, Sabine}, title = {A Comparative Study on Modified Johnson-Cook and Arrhenius-Type Constitutive Models to Predict the Hot Deformation Behaviour of Molybdenum-Hafnium-Carbide Alloy}, series = {Journal of Materials Engineering and Performance}, volume = {30}, journal = {Journal of Materials Engineering and Performance}, number = {3}, issn = {1059-9495}, doi = {10.1007/s11665-021-05464-2}, pages = {1945 -- 1956}, abstract = {Molybdenum alloys are commonly used as tool material for high-temperature deformation processes like forming or forging. For these types of application, the material has to withstand static load at elevated temperatures. To investigate the high-temperature performance of the material, uniaxial hot tensile tests were performed on a Mo-1.2\% Hf-0.1\% C alloy (MHC) over the temperature range of 1173-1473 K with intervals of 100 K and strain rates of 0.001, 0.01 and 0.1 s-1 up to the fracture of the specimen. The flow stress decreases with increase in temperature and the reduction in strain rate. This behaviour could be related to the increasing rate of restoration mechanisms, i.e. dynamic recrystallization or recovery as well as to the decrease in the strain hardening rate. Microstructure of the two most critical hot deformation conditions were shown and compared. Based on modified Johnson-Cook and strain-compensated Arrhenius-type models, constitutive equations were established to predict the high-temperature flow stress of the respective MHC alloy. The accuracy of both models was evaluated by comparing the predicted stress values and the values obtained from experiments. Correlation coefficient, average absolute relative error, the number of material constants involved and the computational time required for evaluating the constants were calculated to quantify and compare the precision of both models. The flow stress values predicted by the constitutive equations are in good agreement with the experimental results. At lower strain rates (0.001 and 0.01 s-1), distinct deviation from the experimental results can be observed for the modified Johnson-Cook model. Despite the longer evaluation time and the larger number of material constants, the deformation behaviour, tracked by the Arrhenius-type model is more accurate throughout the entire deformation process.}, language = {en} }