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| Main Authors: | , , , , , , , , , , , , , |
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| Format: | Preprint |
| Published: |
2025
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| Subjects: | |
| Online Access: | https://arxiv.org/abs/2510.18233 |
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| _version_ | 1866912662614441984 |
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| author | Zhang, Wenjing Cui, Jizhe Wang, Xiaoyang Zhang, Shubo Chong, Yan Godfrey, Andy Tsuji, Nobuhiro Wang, Kai Hu, Rong Xue, Jing Chen, Junyu Fang, Gang Yu, Rong Liu, Wei |
| author_facet | Zhang, Wenjing Cui, Jizhe Wang, Xiaoyang Zhang, Shubo Chong, Yan Godfrey, Andy Tsuji, Nobuhiro Wang, Kai Hu, Rong Xue, Jing Chen, Junyu Fang, Gang Yu, Rong Liu, Wei |
| contents | Alloying by addition of oxygen interstitials during additive manufacturing provides new routes to strengthen and toughen metals and alloys. The underlying mechanisms by which such interstitial atoms lead to enhanced properties remain, however, unclear, not least due a lack of quantitative atomic-scale models linking microstructure to properties. Here using quasi-3D imaging based on multi-slice electron ptychography, we reveal the importance of a new type of interstitial-character lattice defect, namely zero-dimensional stacking domains (ZDSDs), present in high density in AM-processed oxygen-modulated pure titanium. These ZDSDs promote slip diversity, and support intense work hardening, enabling a three-fold enhancement in both strength and ductility in Ti-0.45O compared to conventional pure Ti. The work demonstrates the potential for using interstitial solutes to enhance mechanical properties in a range of critical engineering alloys. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2510_18233 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Zero-Dimensional Stacking Domains Enable Strong-Ductile Synergy in Additive Manufactured Titanium Zhang, Wenjing Cui, Jizhe Wang, Xiaoyang Zhang, Shubo Chong, Yan Godfrey, Andy Tsuji, Nobuhiro Wang, Kai Hu, Rong Xue, Jing Chen, Junyu Fang, Gang Yu, Rong Liu, Wei Materials Science Alloying by addition of oxygen interstitials during additive manufacturing provides new routes to strengthen and toughen metals and alloys. The underlying mechanisms by which such interstitial atoms lead to enhanced properties remain, however, unclear, not least due a lack of quantitative atomic-scale models linking microstructure to properties. Here using quasi-3D imaging based on multi-slice electron ptychography, we reveal the importance of a new type of interstitial-character lattice defect, namely zero-dimensional stacking domains (ZDSDs), present in high density in AM-processed oxygen-modulated pure titanium. These ZDSDs promote slip diversity, and support intense work hardening, enabling a three-fold enhancement in both strength and ductility in Ti-0.45O compared to conventional pure Ti. The work demonstrates the potential for using interstitial solutes to enhance mechanical properties in a range of critical engineering alloys. |
| title | Zero-Dimensional Stacking Domains Enable Strong-Ductile Synergy in Additive Manufactured Titanium |
| topic | Materials Science |
| url | https://arxiv.org/abs/2510.18233 |