Hardening an amorphous-crystal dual-phase Ni–Mo–W alloy with atomic-scale planar faults
Amorphous-crystal dual-phase nanostructures represent a highly promising architectural paradigm for achieving exceptional mechanical properties. However, strategies to design such high-strength materials remain an unresolved challenge. Inspired by thermally-triggered grain boundary relaxation in nan...
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Elsevier
2025-07-01
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| Series: | Journal of Materials Research and Technology |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2238785425016758 |
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| author | Dongsong Zeng Jiongxian Li Yinong Shi Xiuyan Li |
| author_facet | Dongsong Zeng Jiongxian Li Yinong Shi Xiuyan Li |
| author_sort | Dongsong Zeng |
| collection | DOAJ |
| description | Amorphous-crystal dual-phase nanostructures represent a highly promising architectural paradigm for achieving exceptional mechanical properties. However, strategies to design such high-strength materials remain an unresolved challenge. Inspired by thermally-triggered grain boundary relaxation in nanograined alloys, we introduce an innovative approach to incorporate an ultrahigh density of atomic-scale planar faults, including stacking faults and twins, into nanocrystals in an amorphous-crystal dual-phase nanostructure realized via in-situ primary crystallization in a concentrated amorphous Ni-26.6 at.% Mo-3.5 at.% W alloy. The atomic-scale planar faults render tetragonal-shaped nanocrystals and substantially enhance the microhardness of the dual-phase alloy. The observed hardening is closely related to the density of planar faults determined by crystallization temperature. Furthermore, these planar faults markedly elevate the Young's modulus of the nanocrystals. The increased elastic modulus enhances the nanocrystals' ability to arrest shear bands and encourage shear band multiplication through the activity of partial dislocations. The underlying mechanism of hardening can be attributed to the stabilization of confined interfaces as well as enhanced elastic modulus to shear band multiplication. This study provides a novel pathway for optimizing the mechanical performance of dual-phase nanostructured alloys through atomic-scale defect engineering. |
| format | Article |
| id | doaj-art-3fed9e967ae845599e83bf258baae37f |
| institution | Kabale University |
| issn | 2238-7854 |
| language | English |
| publishDate | 2025-07-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Journal of Materials Research and Technology |
| spelling | doaj-art-3fed9e967ae845599e83bf258baae37f2025-08-20T03:31:28ZengElsevierJournal of Materials Research and Technology2238-78542025-07-01373028303410.1016/j.jmrt.2025.07.017Hardening an amorphous-crystal dual-phase Ni–Mo–W alloy with atomic-scale planar faultsDongsong Zeng0Jiongxian Li1Yinong Shi2Xiuyan Li3Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, Shenyang, 110016, China; School of Materials Science and Engineering, University of Science and Technology of China, Shenyang, 110016, ChinaShenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, Shenyang, 110016, ChinaShenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, Shenyang, 110016, China; Corresponding author.Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, Shenyang, 110016, ChinaAmorphous-crystal dual-phase nanostructures represent a highly promising architectural paradigm for achieving exceptional mechanical properties. However, strategies to design such high-strength materials remain an unresolved challenge. Inspired by thermally-triggered grain boundary relaxation in nanograined alloys, we introduce an innovative approach to incorporate an ultrahigh density of atomic-scale planar faults, including stacking faults and twins, into nanocrystals in an amorphous-crystal dual-phase nanostructure realized via in-situ primary crystallization in a concentrated amorphous Ni-26.6 at.% Mo-3.5 at.% W alloy. The atomic-scale planar faults render tetragonal-shaped nanocrystals and substantially enhance the microhardness of the dual-phase alloy. The observed hardening is closely related to the density of planar faults determined by crystallization temperature. Furthermore, these planar faults markedly elevate the Young's modulus of the nanocrystals. The increased elastic modulus enhances the nanocrystals' ability to arrest shear bands and encourage shear band multiplication through the activity of partial dislocations. The underlying mechanism of hardening can be attributed to the stabilization of confined interfaces as well as enhanced elastic modulus to shear band multiplication. This study provides a novel pathway for optimizing the mechanical performance of dual-phase nanostructured alloys through atomic-scale defect engineering.http://www.sciencedirect.com/science/article/pii/S2238785425016758Atomic-scale planar faultsAmorphous-crystal dual-phaseHardeningElastic modulusPartial dislocations |
| spellingShingle | Dongsong Zeng Jiongxian Li Yinong Shi Xiuyan Li Hardening an amorphous-crystal dual-phase Ni–Mo–W alloy with atomic-scale planar faults Journal of Materials Research and Technology Atomic-scale planar faults Amorphous-crystal dual-phase Hardening Elastic modulus Partial dislocations |
| title | Hardening an amorphous-crystal dual-phase Ni–Mo–W alloy with atomic-scale planar faults |
| title_full | Hardening an amorphous-crystal dual-phase Ni–Mo–W alloy with atomic-scale planar faults |
| title_fullStr | Hardening an amorphous-crystal dual-phase Ni–Mo–W alloy with atomic-scale planar faults |
| title_full_unstemmed | Hardening an amorphous-crystal dual-phase Ni–Mo–W alloy with atomic-scale planar faults |
| title_short | Hardening an amorphous-crystal dual-phase Ni–Mo–W alloy with atomic-scale planar faults |
| title_sort | hardening an amorphous crystal dual phase ni mo w alloy with atomic scale planar faults |
| topic | Atomic-scale planar faults Amorphous-crystal dual-phase Hardening Elastic modulus Partial dislocations |
| url | http://www.sciencedirect.com/science/article/pii/S2238785425016758 |
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