Novel reconstruction approaches of austenitic annealing twin boundaries and grain boundaries of ultrafine grained prior austenite
Gaining access to the parent microstructural information is of great significance to explore transformation mechanism and mechanical properties. As a powerful route, existing automatic reconstruction techniques still have two unsolved issues for lath martensitic steels. The first one is to reconstru...
| Main Authors: | , , , , , , |
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| Format: | Article |
| Language: | English |
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Elsevier
2023-03-01
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| Series: | Materials & Design |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S0264127523001077 |
| _version_ | 1797853988235771904 |
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| author | Duanjun Sun Zheng Zhou Kun Zhang Xingyun Yang Xiaohui Liu Zhenghong Guo Jianfeng Gu |
| author_facet | Duanjun Sun Zheng Zhou Kun Zhang Xingyun Yang Xiaohui Liu Zhenghong Guo Jianfeng Gu |
| author_sort | Duanjun Sun |
| collection | DOAJ |
| description | Gaining access to the parent microstructural information is of great significance to explore transformation mechanism and mechanical properties. As a powerful route, existing automatic reconstruction techniques still have two unsolved issues for lath martensitic steels. The first one is to reconstruct annealing twin boundaries in prior austenite accurately, avoiding the distorted twin boundaries caused by orientation-shared variants on both sides. As for the second one, i.e., reconstruction of ultrafine grained prior austenite, no attempt has been succeeded, simply because the number of martensitic variants inside is insufficient for all current algorithms by now. In this paper, two novel approaches are proposed to overcome these difficulties respectively. For the first one, a three-step algorithm combined with parallel computing is developed to implement the basic reconstruction with much higher efficiency, then a physics-based method using phase field simulation is established to resolve the fake twinning morphology. The second one named as Bi-Adjacent-Block method aims at exploring morphologies (i.e., size and shape) of the ultrafine prior austenite grains (PAGs) but not intending to determine their orientations. To identify the PAG boundaries with higher accuracy, an approximate analytic determination of orientation relationship by using only two adjacent variants is developed for the first time. |
| first_indexed | 2024-04-09T19:58:35Z |
| format | Article |
| id | doaj.art-681b511da7aa42268abb3913f110e52c |
| institution | Directory Open Access Journal |
| issn | 0264-1275 |
| language | English |
| last_indexed | 2024-04-09T19:58:35Z |
| publishDate | 2023-03-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Materials & Design |
| spelling | doaj.art-681b511da7aa42268abb3913f110e52c2023-04-03T05:20:40ZengElsevierMaterials & Design0264-12752023-03-01227111692Novel reconstruction approaches of austenitic annealing twin boundaries and grain boundaries of ultrafine grained prior austeniteDuanjun Sun0Zheng Zhou1Kun Zhang2Xingyun Yang3Xiaohui Liu4Zhenghong Guo5Jianfeng Gu6Shanghai Key Laboratory of Materials Laser Processing and Modification, Shanghai Jiao Tong University, Shanghai 200240, China; Institute of Materials Modification and Modelling, School of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, ChinaInstitute of Materials Modification and Modelling, School of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, ChinaInstitute of Materials Modification and Modelling, School of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, ChinaInstitute of Materials Modification and Modelling, School of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, ChinaInstitute of Materials Modification and Modelling, School of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, China; Materials Genome Initiative Center, Shanghai Jiao Tong University, Shanghai 200240, ChinaInstitute of Materials Modification and Modelling, School of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, China; Corresponding authors.Shanghai Key Laboratory of Materials Laser Processing and Modification, Shanghai Jiao Tong University, Shanghai 200240, China; Institute of Materials Modification and Modelling, School of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, China; Materials Genome Initiative Center, Shanghai Jiao Tong University, Shanghai 200240, China; Corresponding authors.Gaining access to the parent microstructural information is of great significance to explore transformation mechanism and mechanical properties. As a powerful route, existing automatic reconstruction techniques still have two unsolved issues for lath martensitic steels. The first one is to reconstruct annealing twin boundaries in prior austenite accurately, avoiding the distorted twin boundaries caused by orientation-shared variants on both sides. As for the second one, i.e., reconstruction of ultrafine grained prior austenite, no attempt has been succeeded, simply because the number of martensitic variants inside is insufficient for all current algorithms by now. In this paper, two novel approaches are proposed to overcome these difficulties respectively. For the first one, a three-step algorithm combined with parallel computing is developed to implement the basic reconstruction with much higher efficiency, then a physics-based method using phase field simulation is established to resolve the fake twinning morphology. The second one named as Bi-Adjacent-Block method aims at exploring morphologies (i.e., size and shape) of the ultrafine prior austenite grains (PAGs) but not intending to determine their orientations. To identify the PAG boundaries with higher accuracy, an approximate analytic determination of orientation relationship by using only two adjacent variants is developed for the first time.http://www.sciencedirect.com/science/article/pii/S0264127523001077ReconstructionAnnealing twin boundaryPhase field simulationUltrafine grainedBi-adjacent-block methodLath martensite |
| spellingShingle | Duanjun Sun Zheng Zhou Kun Zhang Xingyun Yang Xiaohui Liu Zhenghong Guo Jianfeng Gu Novel reconstruction approaches of austenitic annealing twin boundaries and grain boundaries of ultrafine grained prior austenite Materials & Design Reconstruction Annealing twin boundary Phase field simulation Ultrafine grained Bi-adjacent-block method Lath martensite |
| title | Novel reconstruction approaches of austenitic annealing twin boundaries and grain boundaries of ultrafine grained prior austenite |
| title_full | Novel reconstruction approaches of austenitic annealing twin boundaries and grain boundaries of ultrafine grained prior austenite |
| title_fullStr | Novel reconstruction approaches of austenitic annealing twin boundaries and grain boundaries of ultrafine grained prior austenite |
| title_full_unstemmed | Novel reconstruction approaches of austenitic annealing twin boundaries and grain boundaries of ultrafine grained prior austenite |
| title_short | Novel reconstruction approaches of austenitic annealing twin boundaries and grain boundaries of ultrafine grained prior austenite |
| title_sort | novel reconstruction approaches of austenitic annealing twin boundaries and grain boundaries of ultrafine grained prior austenite |
| topic | Reconstruction Annealing twin boundary Phase field simulation Ultrafine grained Bi-adjacent-block method Lath martensite |
| url | http://www.sciencedirect.com/science/article/pii/S0264127523001077 |
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