서지주요정보
W-Ni-Fe 중합금속에서 진공처리에 의한 기계적 성질의 변화 = The effect of vacuum treatment on mechanical properties of W-Ni-Fe heavy alloy
서명 / 저자 W-Ni-Fe 중합금속에서 진공처리에 의한 기계적 성질의 변화 = The effect of vacuum treatment on mechanical properties of W-Ni-Fe heavy alloy / 윤희구.
저자명 윤희구 ; Yoon, Hee-Koo
발행사항 [서울 : 한국과학기술원, 1980].
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소장정보

등록번호

4000902

소장위치/청구기호

학술문화관(문화관) 보존서고

MMS 8021

휴대폰 전송

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반납예정일

리뷰정보

초록정보

The effect of vacuum treatment on mechanical properties of W-Ni-Fe heavy alloy has been studied. The specimens of 96 w/o-2.8w/o Ni-1,2w/o Fe composition have been sintered at 1460℃ in hydrogen and then heat treated at 1000℃ in vacuum or hydrogen from 0 to 6 hours. As-sintered specimens show elongation value of 7.0 ± 0.9% and U.T.S., 750 ± 30 MPa. By vacuum treatment at 1000℃, the elongation and U.T.S. increase markedly to 21.7% and 890MPa, respectively. There is no significant change in mechanical properties with vacuum treating time to 6 hours. But, mechanical properties of the specimens heat treated under hydrogen remain unchanged. When the vacuum treated specimens are exposed again to hydrogen atmosphere at 1000℃, mechanical properties are decreased to the level of as-sintered or hydrogen heat treated specimens. The fracture surfaces of these specimens have been examined by scanning electron microscopy. As-sintered or hydrogen heat treated specimens fractured mainly along the interface between tungsten grains and matrix. In the ductile vacuum treated specimen, however, ductile tensile fracture of the matrix and cleavage fracture through the tungsten grains have been observed. It is suggested that after normal sintering process, heat treatment has no effect on mechanical properties of W-Ni-Fe heavy alloy. On the other hand, the vacuum treatment improves the mechanical properties by removing the hydrogen embrittlement effect.

서지기타정보

서지기타정보
청구기호 {MMS 8021
형태사항 [ii], 51 p. : 삽도 ; 26 cm
언어 한국어
일반주기 부록 : 실험자료 총괄표
저자명의 영문표기 : Hee-Koo Yoon
지도교수의 한글표기 : 윤덕용
지도교수의 영문표기 : Duk-N. Yoon
학위논문 학위논문(석사) - 한국과학기술원 : 재료공학과,
서지주기 참고문헌 : p. 45-47
주제 Tungsten alloys.
Metals --Mechanical properties.
Metals --Heat treatment.
Hydrogen.
중합금. --과학기술용어시소러스
진공 처리. --과학기술용어시소러스
기계적 성질. --과학기술용어시소러스
열 처리. --과학기술용어시소러스
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