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논문 기본 정보
- 자료유형
- 학술저널
- 저자정보
- 발행연도
- 2022.5
- 수록면
- 1,257 - 1,263 (7page)
- DOI
- 10.1007/s12540-021-01018-2
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초록· 키워드
오류제보하기
Microstructure and room temperature mechanical properties of α-titanium alloy Ti-5Al-0.5 V subjected to equal channelangular pressing (ECAP) and subsequent ultrasonic treatment (UST) have been studied. The ECAP was carried out at 600 °Cby route Bcand the UST at the frequency of 20 kHz and amplitude of compression-tension stresses of 100 MPa for processingtime of 60 s. The dislocation densities after ECAP and subsequent UST were estimated by x-ray diffraction and positronlifetime spectroscopy. By the latter, vacancy concentration also was determined. It has been shown that UST results in avery little increase in the dislocation density and vacancy concentration and has no considerable effect on the mechanicalproperties of the ECAP-ed titanium alloys. Basing on the data obtained and earlier published results of computer simulationsof the behavior of nonequilibrium grain boundaries in Ni and Ti under the action of ultrasound it is concluded thatthe structural transformations in Ti under UST occur at much higher stresses than in Ni, in which UST results in significantmodifications of the structure and properties.
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