Abstract
The influence of aging treatments on the evolution of the γ' precipitates in ATI 718Plus was studied using scanning electron microscopy, energy dispersive spectroscopy, transmission electron microscopy, and atomic probe tomography. A set of aging treatments was performed on solution-treated samples to obtain various γ' size distributions. The aging temperatures ranged from 720 to 900°C with holding times of either two hours (for the 900°C aging temperature) or 10 h (for the 720°C and 750°C aging temperatures) followed by either air cooling, furnace cooling, or water quenching. The cooling method and aging temperature influenced the distribution of the solute elements. This work discussed the evolution of the γ' precipitation during single-step aging and two-step aging involving continuous cooling or interrupted cooling. A bimodal size distribution of the γ' precipitates was obtained through interrupted cooling two-step aging treatments, while single-step aging resulted in unimodal γ' precipitate distributions. Graphical abstract: [Figure not available: see fulltext.]
| Original language | English |
|---|---|
| Pages (from-to) | 16445-16461 |
| Number of pages | 17 |
| Journal | Journal of Materials Science |
| Volume | 58 |
| Issue number | 42 |
| DOIs | |
| State | Published - Nov 2023 |
Funding
The authors thank Mr. Kevin Bockenstedt of ATI specialty materials for providing the processed material for this work. The authors thank Dr. Vijay K Vasudevan of the University of North Texas for his valuable inputs. Microscopy and APT were performed as part of a user project at the Center for Nanophase Materials Sciences (CNMS), which is a U.S. DOE Office of Science User Facility by the Scientific User Facilities Division, Office of Basic Energy Sciences, U.S. Department of Energy. The authors acknowledges the support by Department of Science and Technology, Govt. of India through the sponsored project (Grant No: SP20211038MMSERB008277) and the support by Ministry of Education, Govt. of India, through the Institutes of Eminence for the research initiatives on establishing the IoE Research Centre for Advanced Microscopy and Materials (Grant No. SB20210844MMMHRD008277). Part of the microscopy was performed using instrumentation (FEI Talos F200X S/TEM) provided by the Department of Energy, Office of Nuclear Energy, Fuel Cycle R&D Program and the Nuclear Science User Facilities. The authors would like to thank James Burns of Oak Ridge National Laboratory for assistance in performing both the APT sample preparation and the APT experiments. The authors thank Mr. Kevin Bockenstedt of ATI specialty materials for providing the processed material for this work. The authors thank Dr. Vijay K Vasudevan of the University of North Texas for his valuable inputs. Microscopy and APT were performed as part of a user project at the Center for Nanophase Materials Sciences (CNMS), which is a U.S. DOE Office of Science User Facility by the Scientific User Facilities Division, Office of Basic Energy Sciences, U.S. Department of Energy. The authors acknowledges the support by Department of Science and Technology, Govt. of India through the sponsored project (Grant No: SP20211038MMSERB008277) and the support by Ministry of Education, Govt. of India, through the Institutes of Eminence for the research initiatives on establishing the IoE Research Centre for Advanced Microscopy and Materials (Grant No. SB20210844MMMHRD008277). Part of the microscopy was performed using instrumentation (FEI Talos F200X S/TEM) provided by the Department of Energy, Office of Nuclear Energy, Fuel Cycle R&D Program and the Nuclear Science User Facilities. The authors would like to thank James Burns of Oak Ridge National Laboratory for assistance in performing both the APT sample preparation and the APT experiments.