서지주요정보
정적압축및 반복압축응력이 알루미늄 단결정과 다결정의 creep 거동에 미치는 영향 = The effects of static and cyclic stress on the compressive creep behaviors in single and polycrystalline aluminum
서명 / 저자 정적압축및 반복압축응력이 알루미늄 단결정과 다결정의 creep 거동에 미치는 영향 = The effects of static and cyclic stress on the compressive creep behaviors in single and polycrystalline aluminum / 이동헌.
저자명 이동헌 ; Lee, Dong-Hun
발행사항 [서울 : 한국과학기술원, 1987].
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소장정보

등록번호

4104408

소장위치/청구기호

학술문화관(문화관) 보존서고

MMS 8725

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초록정보

To investigate the creep behavior of pure Al under static and cyclic stress at $0.4T_m$, the compressive creep tests are performed. The behavior of compressive creep are similar to that of tensile creep and for polycrystalline Al, the threshold stree (σ/E) is observed to be $6.78×10^{-4}$ under compressive stress. To study crystallographic aspect of creep behavior, the creep test is performed by using the single crystal and the results of creep test are as follows; Irrespective of crystallographic orientation, mostly one slip system is operated at steady state under cyclic creep acceleration and the slip step spacing of operating slip system is narrower in cyclic than in static creep. Another result is that cyclic creep activation energy of single crystal is very similar to that of polycrystalline, this consequence shows that deformation process of single and poly-crystal is same. Also cyclic creep activation energy is 80kJ/mol which is similar to that for pipe diffusion. These results show that cyclic creep acceleration is due to dislocation climb enhanced by mechanically generated excess vacancies under cyclic stress. The lower value of the activation energy of cyclic creep than that of static creep also supports those results.

서지기타정보

서지기타정보
청구기호 {MMS 8725
형태사항 [iv], 71 p. : 삽도 ; 26 cm
언어 한국어
일반주기 부록 : Single crystal growth
저자명의 영문표기 : Dong-Hun Lee
지도교수의 한글표기 : 유진
공동교수의 한글표기 : 남수우
지도교수의 영문표기 : Jin Yu
공동교수의 영문표기 : Soo-Woo Nam
학위논문 학위논문(석사) - 한국과학기술원 : 재료공학과,
서지주기 참고문헌 : p. 52-55
주제 Creep.
Strain and stresses.
알루미늄. --과학기술용어시소러스
단결정. --과학기술용어시소러스
다결정. --과학기술용어시소러스
크리프. --과학기술용어시소러스
압축 응력. --과학기술용어시소러스
Single crystal.
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