Plastic deformation response during crack propagation in Mg bicrystals with twin boundaries
The present study is committed to exploring the intergranular crack performance of magnesium (Mg) bicrystals with typical twin boundaries (TBs) by molecular dynamics simulations coupled with finite element method. Atomic modeling is conducted to determine the traction–separation (T–S) law in a cohes...
| Main Authors: | , , , , , , |
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| Format: | Article |
| Language: | English |
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Elsevier
2023-07-01
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| Series: | Journal of Materials Research and Technology |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S2238785423013881 |
| _version_ | 1797745191410466816 |
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| author | Xin Lai Fang Wang Siyan Ran Guiqiu Xie Gang Liu Rulan Gan Xiangguo Zeng |
| author_facet | Xin Lai Fang Wang Siyan Ran Guiqiu Xie Gang Liu Rulan Gan Xiangguo Zeng |
| author_sort | Xin Lai |
| collection | DOAJ |
| description | The present study is committed to exploring the intergranular crack performance of magnesium (Mg) bicrystals with typical twin boundaries (TBs) by molecular dynamics simulations coupled with finite element method. Atomic modeling is conducted to determine the traction–separation (T–S) law in a cohesive zone. Importantly, the T–S curves together with microstructure evolutions are employed to investigate the plastic response during crack propagating. Afterwards, the obtained T–S parameters are embedded into cohesive elements along grain boundaries of polycrystalline structure, which is efficiently characterized by the Voronoi tessellation. As consequence, the simulation of intergranular fracture in Mg bicrystal is successfully realized by finite element analysis with failure criteria. Eventually, the critical stress intensity factors of compact tension specimens with various TBs are predicted availably. The results demonstrate that the crack propagation is strongly sensitive to twin boundary and resultant plastic deformation behavior at the crack tip. Moreover, it is found that microcracks are produced when TBs interact with dislocations. A comparison between simulated results and published experimental data is provided to highlight the reliability of the multiscale method for studying the cracking performance. |
| first_indexed | 2024-03-12T15:20:47Z |
| format | Article |
| id | doaj.art-6084400dde1a4ddbb0bf7b01317c596d |
| institution | Directory Open Access Journal |
| issn | 2238-7854 |
| language | English |
| last_indexed | 2024-03-12T15:20:47Z |
| publishDate | 2023-07-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Journal of Materials Research and Technology |
| spelling | doaj.art-6084400dde1a4ddbb0bf7b01317c596d2023-08-11T05:33:41ZengElsevierJournal of Materials Research and Technology2238-78542023-07-012533373349Plastic deformation response during crack propagation in Mg bicrystals with twin boundariesXin Lai0Fang Wang1Siyan Ran2Guiqiu Xie3Gang Liu4Rulan Gan5Xiangguo Zeng6School of Materials and Energy, Southwest University, Chongqing 400715, ChinaSchool of Materials and Energy, Southwest University, Chongqing 400715, China; Corresponding author.School of Mathematics and Statistics, Southwest University, Chongqing 400715, ChinaSchool of Materials and Energy, Southwest University, Chongqing 400715, ChinaSchool of Materials and Energy, Southwest University, Chongqing 400715, ChinaCollege of Computer and Information Science, Southwest University, Chongqing 400715, China; Corresponding author.College of Architecture and Environment, Sichuan University, Chengdu 610065, ChinaThe present study is committed to exploring the intergranular crack performance of magnesium (Mg) bicrystals with typical twin boundaries (TBs) by molecular dynamics simulations coupled with finite element method. Atomic modeling is conducted to determine the traction–separation (T–S) law in a cohesive zone. Importantly, the T–S curves together with microstructure evolutions are employed to investigate the plastic response during crack propagating. Afterwards, the obtained T–S parameters are embedded into cohesive elements along grain boundaries of polycrystalline structure, which is efficiently characterized by the Voronoi tessellation. As consequence, the simulation of intergranular fracture in Mg bicrystal is successfully realized by finite element analysis with failure criteria. Eventually, the critical stress intensity factors of compact tension specimens with various TBs are predicted availably. The results demonstrate that the crack propagation is strongly sensitive to twin boundary and resultant plastic deformation behavior at the crack tip. Moreover, it is found that microcracks are produced when TBs interact with dislocations. A comparison between simulated results and published experimental data is provided to highlight the reliability of the multiscale method for studying the cracking performance.http://www.sciencedirect.com/science/article/pii/S2238785423013881MagnesiumTwin boundariesFracture responsePlasticityCohesive zone model |
| spellingShingle | Xin Lai Fang Wang Siyan Ran Guiqiu Xie Gang Liu Rulan Gan Xiangguo Zeng Plastic deformation response during crack propagation in Mg bicrystals with twin boundaries Journal of Materials Research and Technology Magnesium Twin boundaries Fracture response Plasticity Cohesive zone model |
| title | Plastic deformation response during crack propagation in Mg bicrystals with twin boundaries |
| title_full | Plastic deformation response during crack propagation in Mg bicrystals with twin boundaries |
| title_fullStr | Plastic deformation response during crack propagation in Mg bicrystals with twin boundaries |
| title_full_unstemmed | Plastic deformation response during crack propagation in Mg bicrystals with twin boundaries |
| title_short | Plastic deformation response during crack propagation in Mg bicrystals with twin boundaries |
| title_sort | plastic deformation response during crack propagation in mg bicrystals with twin boundaries |
| topic | Magnesium Twin boundaries Fracture response Plasticity Cohesive zone model |
| url | http://www.sciencedirect.com/science/article/pii/S2238785423013881 |
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