Enhancing dynamic property in additive manufactured IN738LC alloy through cell orientation control
Cell structures are common substructures in additive-manufactured (AM) superalloys, yet their influence on high strain-rate dynamic behavior remains unclear. Herein, two IN738LC alloys with different cell orientations were fabricated via AM and assessed for dynamic behavior at strain rates of ∼105/s using flyer-plate impact tests. Results show that preferential cell growth along the building direction (BD) enhances spall strength by 12–13% (4.36∼4.51 GPa) compared to random orientations (3.91∼3.99 GPa). The enhancement arises from cell alignment along the BD. This alignment makes the cell wall, a damage nucleation site, parallel to the impact direction, restricting damage void coalescence and crack propagation.
Authors
- Liqun Li (ORCID: https://orcid.org/0000-0001-6275-3399)
- Jianfeng Gong (ORCID: https://orcid.org/0000-0001-8518-6796)
- Shuai Chang (ORCID: https://orcid.org/0000-0001-7405-5555)
- Hongwei Ding (ORCID: https://orcid.org/0000-0002-0851-1994)
- Jun Ding (ORCID: https://orcid.org/0000-0003-3752-1750)
- Zhiguo Li (ORCID: https://orcid.org/0000-0001-7847-7608)
- Rui Ma (ORCID: https://orcid.org/0000-0003-0188-5499)
- Mingchuan Li (ORCID: https://orcid.org/0000-0001-5185-6392)
Institutions
- National University of Singapore (SG)
- Harbin Institute of Technology (CN)
- China Academy of Engineering Physics (CN)
- Beijing Institute of Power Machinery (China) (CN)
Publication Details
- Journal
- Materials Research Letters
- Published
- 2025-03-05
- DOI
- https://doi.org/10.1080/21663831.2025.2472963
- Primary Topic
- Additive Manufacturing Materials and Processes
- Type
- article
- Field-Weighted Citation Impact
- 0.00
Funders
- National Natural Science Foundation of China
- National Key Research and Development Program of China