Microstructure and Mechanical Properties of Selective Laser Melted Reduced Activation Ferritic/Martensitic Steel
Abstract
:1. Introduction
2. Materials and Experimental Procedures
2.1. Materials
2.2. Experimental Procedures
3. Results and Discussion
3.1. Microstructure
3.2. Mechanical Properties
4. Conclusions
- (1)
- The relative density of the SLMed CLF-1 samples exceeded 99%, and there were no obvious tracks and pores in the samples due to using the PREP powder.
- (2)
- Numerous nano-sized spherical and needle-like precipitates were dispersion distributed in the grains and boundary of the grains, and the precipitates were mainly composed of M23C6 carbide and MX carbide. The microstructure was composed of columnar grains and equiaxed grains, and the smallest average size of the grains was 15 ± 2.1 µm under the procedure parameters of 320 W power and 800 mm/s scanning velocity.
- (3)
- The sample at 320 W power and 800 mm/s scanning velocity exhibited higher yield strength (875 ± 6.0 MPa) and higher elongation (25.6 ± 0.8%) than that of the sample at 200 W power, 800 mm/s scanning velocity, yield strength (715 ± 1.5 MPa), and elongation (22.6 ± 1.2%).
Author Contributions
Funding
Data Availability Statement
Conflicts of Interest
References
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Element | C | Cr | W | Ta | V | Mn | Fe |
---|---|---|---|---|---|---|---|
Wt% | 0.11 | 9.4 | 1.5 | 0.15 | 0.21 | 0.47 | 88.16 |
Laser Power (W) | Scanning Velocity (mm/s) | Layer Thickness (μm) | Hatch Spacing (μm) |
---|---|---|---|
200 | 600 | 30 | 85 |
800 | |||
320 | 600 | ||
800 |
Location | 200 W 800 mm/s | 320 W 800 mm/s | |
---|---|---|---|
Micro-hardness (HV) | Top | 293 ± 3 | 296 ± 5 |
Middle | 289 ± 8 | 310 ± 3 | |
Bottom | 312 ± 7 | 323 ± 6 |
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Yuan, Z.; Xiao, C.; Liu, H.; Sun, X.; Zhao, G.; Liao, H.; Qian, W.; Yuan, J.; Lao, C.; Wang, H. Microstructure and Mechanical Properties of Selective Laser Melted Reduced Activation Ferritic/Martensitic Steel. Metals 2022, 12, 2044. https://doi.org/10.3390/met12122044
Yuan Z, Xiao C, Liu H, Sun X, Zhao G, Liao H, Qian W, Yuan J, Lao C, Wang H. Microstructure and Mechanical Properties of Selective Laser Melted Reduced Activation Ferritic/Martensitic Steel. Metals. 2022; 12(12):2044. https://doi.org/10.3390/met12122044
Chicago/Turabian StyleYuan, Zihao, Chenyu Xiao, Hao Liu, Xuejing Sun, Guangyi Zhao, Hongbin Liao, Wei Qian, Jingkun Yuan, Changshi Lao, and Huajie Wang. 2022. "Microstructure and Mechanical Properties of Selective Laser Melted Reduced Activation Ferritic/Martensitic Steel" Metals 12, no. 12: 2044. https://doi.org/10.3390/met12122044