Balancing strength and ductility in additive-manufactured bulk titanium by interception of titanium hydrides
We report the interception of two titanium hydrides in bulk Ti via additive manufacturing (AM) of hydride-de-hydride (HDH) Ti powders with high H content: nano-sized, stable face-centered cubic (FCC) δ-TiHx plate within α-Ti grains and ultrafine, metastable face-centered tetragonal (FCT) γ-TiH aciculae crossing adjacent α-Ti grain boundaries. Remarkably, the AM bulk Ti achieves a surprising balance of strength and ductility, surpassing those of AM bulk Ti and TC4 alloys. This balance is attributed to effective work hardening from {111} twinning in the FCC δ-TiHx plate, a hindrance to dislocation motion, and high-density dislocation pile-ups around the FCT γ-TiH aciculae dowel connectors.
Authors
- Chao Yang (ORCID: https://orcid.org/0000-0003-1902-1461)
- Xiaobing Luo (ORCID: https://orcid.org/0000-0002-6423-9868)
- Tao Song (ORCID: https://orcid.org/0000-0002-9389-7595)
- Dongdong Li (ORCID: https://orcid.org/0000-0001-6671-7475)
- Zhao Liu (ORCID: https://orcid.org/0000-0002-7186-6341)
- Jiayin Li (ORCID: https://orcid.org/0000-0002-1179-1077)
- Weisi Cai
- Yang Yang
Institutions
- Huazhong University of Science and Technology (CN)
- South China University of Technology (CN)
Publication Details
- Journal
- Materials Research Letters
- Published
- 2024-12-13
- DOI
- https://doi.org/10.1080/21663831.2024.2440041
- Citations
- 1
- Primary Topic
- Titanium Alloys Microstructure and Properties
- Type
- article
- Field-Weighted Citation Impact
- 0.12
Funders
- National Natural Science Foundation of China
- Special Fund Project for Science and Technology Innovation Strategy of Guangdong Province
- Basic and Applied Basic Research Foundation of Guangdong Province