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논문 기본 정보
- 자료유형
- 학술저널
- 저자정보
- 발행연도
- 2024.9
- 수록면
- 2,422 - 2,432 (11page)
- DOI
- 10.1007/s12540-024-01651-7
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초록· 키워드
오류제보하기
Continuous extrusion is a very promising technique for forming Cu–Cr–Zr alloys which takes the upward continuouscasted rods as raw materials. While the hot deformation behavior and constitutive equation of as-cast rods have never beenreported. In the present study, the hot deformation behavior of as-cast Cu–Cr–Zr rods with columnar grains was investigated.
The results showed that the flow stress at 500 °C is higher than that at 400 °C. The reason for that can be attributed to thedynamic precipitation process, which was confirmed by TEM observations. At this temperature, partial CDRX dominatesthe softening mechanism while at high temperatures DRV and DDRX play a critical role. The constitutive equation wasthen established and the deformation activation energy was determined to be 541.93 kJ/mol. The high activation energy wasattributed to the large solidified columnar grains. At high strains, stable metal flows can be obtained at high strain rates andhigh temperatures according to the processing maps, which indicates that a high-speed deformation at a high temperatureis favorable to the plastic forming of this material. This investigation thus provides valuable information on how to processthe Cu–Cr–Zr rods by plastic deformation methods, for example, continuous extrusion.
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