--- _id: '36335' abstract: - lang: eng text: Transformation of Fe- and Cu-rich primary phase particles was studied in an Al-Li-based alloy prepared by twin-roll casting. Thin foils for combined STEM and SEM experiments were prepared by electrolytic twin-jet polishing. They were in-situ heated in a TEM heating stage and observed at 200 kV in the JEOL JEM 2200FS electron microscope equipped with STEM HAADF and BF detectors and SEM BSE and SE detectors working both in composition and topographic modes. The resulting structures were combined with EDS mapping performed directly in the heating holder. Dissolution and transformation of Cu- and Fe-rich particles occur above 500 °C. EDS maps acquired on the foil cooled down to room temperature show that Cu and Fe are both still present in newly formed particles, most likely indicating the presence of the Al7Cu2Fe phase. author: - first_name: Miroslav full_name: CIESLAR, Miroslav last_name: CIESLAR - first_name: Barbora full_name: KŘIVSKÁ, Barbora last_name: KŘIVSKÁ - first_name: Rostislav full_name: KRÁLÍK, Rostislav last_name: KRÁLÍK - first_name: Lucia full_name: BAJTOŠOVÁ, Lucia last_name: BAJTOŠOVÁ - first_name: Olexandr full_name: Grydin, Olexandr id: '43822' last_name: Grydin - first_name: Mykhailo full_name: STOLBCHENKO, Mykhailo last_name: STOLBCHENKO - first_name: Mirko full_name: Schaper, Mirko id: '43720' last_name: Schaper citation: ama: 'CIESLAR M, KŘIVSKÁ B, KRÁLÍK R, et al. HOMOGENIZATION OF TWIN-ROLL CAST Al-Li-BASED ALLOY STUDIED BY IN-SITU ELECTRON MICROSCOPY. In: METAL 2022 Conference Proeedings. TANGER Ltd.; 2022. doi:10.37904/metal.2022.4438' apa: CIESLAR, M., KŘIVSKÁ, B., KRÁLÍK, R., BAJTOŠOVÁ, L., Grydin, O., STOLBCHENKO, M., & Schaper, M. (2022). HOMOGENIZATION OF TWIN-ROLL CAST Al-Li-BASED ALLOY STUDIED BY IN-SITU ELECTRON MICROSCOPY. METAL 2022 Conference Proeedings. Metal 2022, Brno. https://doi.org/10.37904/metal.2022.4438 bibtex: '@inproceedings{CIESLAR_KŘIVSKÁ_KRÁLÍK_BAJTOŠOVÁ_Grydin_STOLBCHENKO_Schaper_2022, title={HOMOGENIZATION OF TWIN-ROLL CAST Al-Li-BASED ALLOY STUDIED BY IN-SITU ELECTRON MICROSCOPY}, DOI={10.37904/metal.2022.4438}, booktitle={METAL 2022 Conference Proeedings}, publisher={TANGER Ltd.}, author={CIESLAR, Miroslav and KŘIVSKÁ, Barbora and KRÁLÍK, Rostislav and BAJTOŠOVÁ, Lucia and Grydin, Olexandr and STOLBCHENKO, Mykhailo and Schaper, Mirko}, year={2022} }' chicago: CIESLAR, Miroslav, Barbora KŘIVSKÁ, Rostislav KRÁLÍK, Lucia BAJTOŠOVÁ, Olexandr Grydin, Mykhailo STOLBCHENKO, and Mirko Schaper. “HOMOGENIZATION OF TWIN-ROLL CAST Al-Li-BASED ALLOY STUDIED BY IN-SITU ELECTRON MICROSCOPY.” In METAL 2022 Conference Proeedings. TANGER Ltd., 2022. https://doi.org/10.37904/metal.2022.4438. ieee: 'M. CIESLAR et al., “HOMOGENIZATION OF TWIN-ROLL CAST Al-Li-BASED ALLOY STUDIED BY IN-SITU ELECTRON MICROSCOPY,” presented at the Metal 2022, Brno, 2022, doi: 10.37904/metal.2022.4438.' mla: CIESLAR, Miroslav, et al. “HOMOGENIZATION OF TWIN-ROLL CAST Al-Li-BASED ALLOY STUDIED BY IN-SITU ELECTRON MICROSCOPY.” METAL 2022 Conference Proeedings, TANGER Ltd., 2022, doi:10.37904/metal.2022.4438. short: 'M. CIESLAR, B. KŘIVSKÁ, R. KRÁLÍK, L. BAJTOŠOVÁ, O. Grydin, M. STOLBCHENKO, M. Schaper, in: METAL 2022 Conference Proeedings, TANGER Ltd., 2022.' conference: end_date: 2022-05-19 location: Brno name: Metal 2022 start_date: 2022-05-18 date_created: 2023-01-12T09:39:41Z date_updated: 2023-01-12T09:44:17Z department: - _id: '158' - _id: '321' doi: 10.37904/metal.2022.4438 keyword: - Al-Li-based alloy - in-situ TEM - homogenization - phase transformation language: - iso: eng main_file_link: - open_access: '1' url: https://www.confer.cz/metal/2022/4438-homogenization-of-twin-roll-cast-al-li-based-alloy-studied-by-in-situ-electron-microscopy oa: '1' publication: METAL 2022 Conference Proeedings publication_identifier: issn: - 2694-9296 publication_status: published publisher: TANGER Ltd. status: public title: HOMOGENIZATION OF TWIN-ROLL CAST Al-Li-BASED ALLOY STUDIED BY IN-SITU ELECTRON MICROSCOPY type: conference user_id: '43822' year: '2022' ... --- _id: '21442' author: - first_name: Steffen Rainer full_name: Tinkloh, Steffen Rainer id: '72722' last_name: Tinkloh - first_name: Tao full_name: Wu, Tao last_name: Wu - first_name: Thomas full_name: Tröster, Thomas id: '553' last_name: Tröster - first_name: Thomas full_name: Niendorf, Thomas last_name: Niendorf citation: ama: 'Tinkloh SR, Wu T, Tröster T, Niendorf T. Development of a submodel technique for FFT-based solvers in micromechanical analysis. In: ; 2021.' apa: Tinkloh, S. R., Wu, T., Tröster, T., & Niendorf, T. (2021). Development of a submodel technique for FFT-based solvers in micromechanical analysis. Presented at the 2nd International Conference on Theoretical, Analytical and Computational Methods for Composite Materials and Composite Structures (online). bibtex: '@inproceedings{Tinkloh_Wu_Tröster_Niendorf_2021, title={Development of a submodel technique for FFT-based solvers in micromechanical analysis}, author={Tinkloh, Steffen Rainer and Wu, Tao and Tröster, Thomas and Niendorf, Thomas}, year={2021} }' chicago: Tinkloh, Steffen Rainer, Tao Wu, Thomas Tröster, and Thomas Niendorf. “Development of a Submodel Technique for FFT-Based Solvers in Micromechanical Analysis,” 2021. ieee: S. R. Tinkloh, T. Wu, T. Tröster, and T. Niendorf, “Development of a submodel technique for FFT-based solvers in micromechanical analysis,” presented at the 2nd International Conference on Theoretical, Analytical and Computational Methods for Composite Materials and Composite Structures (online), 2021. mla: Tinkloh, Steffen Rainer, et al. Development of a Submodel Technique for FFT-Based Solvers in Micromechanical Analysis. 2021. short: 'S.R. Tinkloh, T. Wu, T. Tröster, T. Niendorf, in: 2021.' conference: end_date: 2021-03-07 name: 2nd International Conference on Theoretical, Analytical and Computational Methods for Composite Materials and Composite Structures (online) start_date: 2021-03-05 date_created: 2021-03-11T09:29:55Z date_updated: 2022-01-06T06:54:59Z ddc: - '620' department: - _id: '9' - _id: '321' - _id: '149' keyword: - Micromechanics - Fast Fourier Transform (FFT) - Reduced Order Modelling - Homogenization language: - iso: eng project: - _id: '52' name: Computing Resources Provided by the Paderborn Center for Parallel Computing status: public title: Development of a submodel technique for FFT-based solvers in micromechanical analysis type: conference_abstract user_id: '72722' year: '2021' ... --- _id: '23431' abstract: - lang: eng text: As an effective and accurate method for modelling composite materials, mean-field homogenization is still not well studied in modelling non-linear and damage behaviours of UD composites. Investigated micro FE-simulations show that the matrix of UD composites exhibits different average plastic behaviour, named as average asymmetric matrix plasticity (AAMP), when the composite behaves different under shear, longitudinal and transverse loadings. In this study, a non-linear mean-field debonding model (NMFDM) combining a mean-field model and a fibre–matrix interface debonding model, is developed to simulate UD composites under consideration of AAMP, fibre–matrix interface damage and progressive failure. AAMP is considered by using so-called stress mode factor, which is expressed in terms of basic invariants of the matrix deviatoric stress tensor and is used as an indicator for detection of differences in the loading mode. The material behaviour of UD composites with imperfect interface is assumed identical as for perfect interface and stiffness reduced fibres. Progressive failure criteria are established with consideration of fibre breakage and matrix crack for different fibre orientations. As a representative example for the NMFDM, a C30/E201 UD composite is studied. To verify the model, experiments are conducted on polymers, carbon fibres and UD CFRPs. Finally, the model is applied to simulate a perforated CFRP laminate, which shows excellent prediction ability on deformation, debonding and progressive failure. article_number: '109209' author: - first_name: C. full_name: Cheng, C. last_name: Cheng - first_name: Z. full_name: Wang, Z. last_name: Wang - first_name: Z. full_name: Jin, Z. last_name: Jin - first_name: X. full_name: Ju, X. last_name: Ju - first_name: Swetlana full_name: Schweizer, Swetlana id: '8938' last_name: Schweizer - first_name: Thomas full_name: Tröster, Thomas id: '553' last_name: Tröster - first_name: Rolf full_name: Mahnken, Rolf id: '335' last_name: Mahnken citation: ama: 'Cheng C, Wang Z, Jin Z, et al. Non-linear mean-field modelling of UD composite laminates accounting for average asymmetric plasticity of the matrix, debonding and progressive failure. Composites Part B: Engineering. 2021;224. doi:10.1016/j.compositesb.2021.109209' apa: 'Cheng, C., Wang, Z., Jin, Z., Ju, X., Schweizer, S., Tröster, T., & Mahnken, R. (2021). Non-linear mean-field modelling of UD composite laminates accounting for average asymmetric plasticity of the matrix, debonding and progressive failure. Composites Part B: Engineering, 224, Article 109209. https://doi.org/10.1016/j.compositesb.2021.109209' bibtex: '@article{Cheng_Wang_Jin_Ju_Schweizer_Tröster_Mahnken_2021, title={Non-linear mean-field modelling of UD composite laminates accounting for average asymmetric plasticity of the matrix, debonding and progressive failure}, volume={224}, DOI={10.1016/j.compositesb.2021.109209}, number={109209}, journal={Composites Part B: Engineering}, author={Cheng, C. and Wang, Z. and Jin, Z. and Ju, X. and Schweizer, Swetlana and Tröster, Thomas and Mahnken, Rolf}, year={2021} }' chicago: 'Cheng, C., Z. Wang, Z. Jin, X. Ju, Swetlana Schweizer, Thomas Tröster, and Rolf Mahnken. “Non-Linear Mean-Field Modelling of UD Composite Laminates Accounting for Average Asymmetric Plasticity of the Matrix, Debonding and Progressive Failure.” Composites Part B: Engineering 224 (2021). https://doi.org/10.1016/j.compositesb.2021.109209.' ieee: 'C. Cheng et al., “Non-linear mean-field modelling of UD composite laminates accounting for average asymmetric plasticity of the matrix, debonding and progressive failure,” Composites Part B: Engineering, vol. 224, Art. no. 109209, 2021, doi: 10.1016/j.compositesb.2021.109209.' mla: 'Cheng, C., et al. “Non-Linear Mean-Field Modelling of UD Composite Laminates Accounting for Average Asymmetric Plasticity of the Matrix, Debonding and Progressive Failure.” Composites Part B: Engineering, vol. 224, 109209, 2021, doi:10.1016/j.compositesb.2021.109209.' short: 'C. Cheng, Z. Wang, Z. Jin, X. Ju, S. Schweizer, T. Tröster, R. Mahnken, Composites Part B: Engineering 224 (2021).' date_created: 2021-08-18T06:20:21Z date_updated: 2023-01-24T13:02:15Z department: - _id: '9' - _id: '154' - _id: '321' doi: 10.1016/j.compositesb.2021.109209 intvolume: ' 224' keyword: - Non-linear mean-field homogenization Average asymmetric plasticity of matrix Fibre–matrix interface debonding Micro-mechanical FE-simulation Progressive failure language: - iso: eng publication: 'Composites Part B: Engineering' publication_identifier: issn: - 1359-8368 publication_status: published quality_controlled: '1' status: public title: Non-linear mean-field modelling of UD composite laminates accounting for average asymmetric plasticity of the matrix, debonding and progressive failure type: journal_article user_id: '335' volume: 224 year: '2021' ...