Insight into the interfacial architecture of a hybrid additively- manufactured stainless steel/Ni-based superalloy bimetal
The joint strength of hybrid additively-manufactured dissimilar metals dominantly depends on the interfacial architecture, whereas its multi-scale microstructure and contributions to mechanical property need further clarity. In this study, we have obtained crack-free and lamella-like interfacial arc...
| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
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Elsevier
2022-04-01
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| Series: | Materials & Design |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S0264127522002167 |
| _version_ | 1818126385636442112 |
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| author | Xiaofeng Dang Yao Li Kai Chen Sihai Luo Xiaoqing Liang Weifeng He |
| author_facet | Xiaofeng Dang Yao Li Kai Chen Sihai Luo Xiaoqing Liang Weifeng He |
| author_sort | Xiaofeng Dang |
| collection | DOAJ |
| description | The joint strength of hybrid additively-manufactured dissimilar metals dominantly depends on the interfacial architecture, whereas its multi-scale microstructure and contributions to mechanical property need further clarity. In this study, we have obtained crack-free and lamella-like interfacial architecture in the transition region of a stainless steel/Ni-based superalloy bimetal conjugated by laser directed energy deposition. Upon rapid solidification, insufficient solute mixing and complex fluid flow endow the interfacial architecture with pronounced concentration fluctuations and interwoven grain/sub-grain structures. Additionally, high-level thermal stresses and misfit strains induce plentiful inter-lamellar crystal defects, including randomly distributed dislocations, misfit dislocation arrays, stacking faults and stacking fault tetrahedral. The alternate soft and stiff lamella architecture decorated by grown-in crystal defects as well as the 3D grain/sub-grain structure interlock is effective in retarding dislocation motion and accommodating further plastic deformation, potentially enhancing the damage tolerance against applied loads. |
| first_indexed | 2024-12-11T07:00:37Z |
| format | Article |
| id | doaj.art-e71211ae05674e40b0470f961805fdfe |
| institution | Directory Open Access Journal |
| issn | 0264-1275 |
| language | English |
| last_indexed | 2024-12-11T07:00:37Z |
| publishDate | 2022-04-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Materials & Design |
| spelling | doaj.art-e71211ae05674e40b0470f961805fdfe2022-12-22T01:16:37ZengElsevierMaterials & Design0264-12752022-04-01216110595Insight into the interfacial architecture of a hybrid additively- manufactured stainless steel/Ni-based superalloy bimetalXiaofeng Dang0Yao Li1Kai Chen2Sihai Luo3Xiaoqing Liang4Weifeng He5Science and Technology on Plasma Dynamics Laboratory, Air Force Engineering University, Xi’an, Shaanxi 710038, ChinaSchool of Materials Science and Engineering, Chang’an University, Xi’an, Shaanxi 710064, China; Corresponding authors.Center for Advancing Materials Performance from the Nanoscale (CAMP-Nano), State Key Laboratory for Mechanical Behavior of Materials, Xi’an Jiaotong University, Xi’an, Shaanxi 710049, ChinaScience and Technology on Plasma Dynamics Laboratory, Air Force Engineering University, Xi’an, Shaanxi 710038, ChinaScience and Technology on Plasma Dynamics Laboratory, Air Force Engineering University, Xi’an, Shaanxi 710038, ChinaScience and Technology on Plasma Dynamics Laboratory, Air Force Engineering University, Xi’an, Shaanxi 710038, China; Institute of Aeronautics Engine, School of Mechanical Engineering, Xi’an Jiaotong University, Xi’an 710049, China; Corresponding authors.The joint strength of hybrid additively-manufactured dissimilar metals dominantly depends on the interfacial architecture, whereas its multi-scale microstructure and contributions to mechanical property need further clarity. In this study, we have obtained crack-free and lamella-like interfacial architecture in the transition region of a stainless steel/Ni-based superalloy bimetal conjugated by laser directed energy deposition. Upon rapid solidification, insufficient solute mixing and complex fluid flow endow the interfacial architecture with pronounced concentration fluctuations and interwoven grain/sub-grain structures. Additionally, high-level thermal stresses and misfit strains induce plentiful inter-lamellar crystal defects, including randomly distributed dislocations, misfit dislocation arrays, stacking faults and stacking fault tetrahedral. The alternate soft and stiff lamella architecture decorated by grown-in crystal defects as well as the 3D grain/sub-grain structure interlock is effective in retarding dislocation motion and accommodating further plastic deformation, potentially enhancing the damage tolerance against applied loads.http://www.sciencedirect.com/science/article/pii/S0264127522002167Hybrid additive manufacturingBimetallic interfacial architectureInterlocked grain structureMisfit dislocationsMechanical property |
| spellingShingle | Xiaofeng Dang Yao Li Kai Chen Sihai Luo Xiaoqing Liang Weifeng He Insight into the interfacial architecture of a hybrid additively- manufactured stainless steel/Ni-based superalloy bimetal Materials & Design Hybrid additive manufacturing Bimetallic interfacial architecture Interlocked grain structure Misfit dislocations Mechanical property |
| title | Insight into the interfacial architecture of a hybrid additively- manufactured stainless steel/Ni-based superalloy bimetal |
| title_full | Insight into the interfacial architecture of a hybrid additively- manufactured stainless steel/Ni-based superalloy bimetal |
| title_fullStr | Insight into the interfacial architecture of a hybrid additively- manufactured stainless steel/Ni-based superalloy bimetal |
| title_full_unstemmed | Insight into the interfacial architecture of a hybrid additively- manufactured stainless steel/Ni-based superalloy bimetal |
| title_short | Insight into the interfacial architecture of a hybrid additively- manufactured stainless steel/Ni-based superalloy bimetal |
| title_sort | insight into the interfacial architecture of a hybrid additively manufactured stainless steel ni based superalloy bimetal |
| topic | Hybrid additive manufacturing Bimetallic interfacial architecture Interlocked grain structure Misfit dislocations Mechanical property |
| url | http://www.sciencedirect.com/science/article/pii/S0264127522002167 |
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