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Study of microstructure evolution and properties of ZrTi/GH4169 alloys prepared by low-temperature sintering of SPS.
- Source :
-
Materials Characterization . Jul2023, Vol. 201, pN.PAG-N.PAG. 1p. - Publication Year :
- 2023
-
Abstract
- This paper proposes a method involving low-temperature SPS for preparing ZrTi/GH4169 alloy blanks. The addition of GH4169 alloy significantly reduces the sintering temperature of ZrTi alloy. The Zr30-Ti62-Ni8 ratio was used to obtain equiaxed grains of ZrTi alloy through sintering at 1000 °C, and billets with excellent strength and plasticity under high-temperature deformation were obtained by sintering at 1100 °C. In the sintering temperature range from 1000 °C to 1200 °C, while both α-phase and Zr 2 (Fe,Ni) phase size increased with the sintering temperature, the amount of increase was different. Specifically, the α-phase in the alloy blanks sintered at 1100 °C was fine and reticulated, whereas that sintered at 1200 °C developed into a slatted structure. Strengthening mechanism analysis showed that the strength and plasticity of the 1100 °C sintered blanks were excellent, especially because of the effect of the reticulated α-phase and Zr 2 (Fe,Ni) phase. Furthermore, the high density of the phase interface hindered dislocation movement and inhibited stress concentration. In particular, the Zr 2 (Fe,Ni) phase distributed along the β-phase grain boundaries and around the α-phase in the grain acted as a nail, and it could inhibit grain growth and increase resistance to dislocation motion. The weaker β-phase weave and lower defect density also contributed to the superior material properties of the 1100 °C sintered blanks. • This paper proposes a method involving low-temperature SPS for preparing ZrTi/GH4169 alloy blanks. • Zr30-Ti62-Ni8 blanks with excellent strength and plasticity under high temperature deformation were obtained by sintering at 1000°C–1200 °C. • 4) The weaker β-phase weave and lower defect density were also responsible for the superior material properties in the case of sintering at 1100 °C. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 10445803
- Volume :
- 201
- Database :
- Academic Search Index
- Journal :
- Materials Characterization
- Publication Type :
- Academic Journal
- Accession number :
- 163848935
- Full Text :
- https://doi.org/10.1016/j.matchar.2023.112918