서지주요정보
0.6 Tm 온도영역에서의 INCONEL alloy 718 에 대한 cyclic creep 특성에 관한 연구 = A study on the cyclic creep characteristics of INCONEL alloy 718 at 0.6 Tm temperature range
서명 / 저자 0.6 Tm 온도영역에서의 INCONEL alloy 718 에 대한 cyclic creep 특성에 관한 연구 = A study on the cyclic creep characteristics of INCONEL alloy 718 at 0.6 Tm temperature range / 최인식.
저자명 최인식 ; Choi, In-Sik
발행사항 [서울 : 한국과학기술원, 1980].
Online Access 원문보기 원문인쇄

소장정보

등록번호

4000908

소장위치/청구기호

학술문화관(문화관) 보존서고

MMS 8027

SMS전송

도서상태

이용가능

대출가능

반납예정일

초록정보

The cyclic creep behaviour of INCONEL alloy 718 of Ni-Iron base superalloy has been examined under the condition of square wave stress cycling tension creep test in the temperature, stress and frequency ranges of 621-677℃ (0.57-0.61 Tm), 25-87.5 Kg/㎟ (245-857.5 MPa), and 12 cpm or 0.2857 cpm, respectively. Square wave cyclic stress is chosen with the minimum stress equals to 70% of the maximum stress. Also static creep behaviour of INCONEL alloy 718 has been examined, and the relations between cyclic creep and static creep have been studied. The observation of the stress mode changed, so-called "static-to-dynamic creep transition", was interpreted in terms of mobile dislocation density changes. Over the range of experimental conditions examined, "cyclic stress acceleration" occurs. Microstrain for cyclic creep was measured and its behaviour was investigated in the view of internal stress changes in region of primary creep. The activation energy for static creep deformation was measured to be similar to that of interdiffusion in INCONEL alloy 718. Also the activation energies for cyclic and subsequent static creep deformation were measured and the relations among these were studied by means of effective stress differences. The stress exponent value for cyclic and static creep is observed to be about 3.1 and 3.0, respectively. From the above facts, it is considered that creep deformation for INCONEL alloy 718 is controlled by dislocation glide over the range of experimental conditions, and that the alloy belongs to class I alloys.

서지기타정보

서지기타정보
청구기호 {MMS 8027
형태사항 [iv], 89 p. : 삽도 ; 26 cm
언어 한국어
일반주기 부록 수록
저자명의 영문표기 : In-Sik Choi
지도교수의 한글표기 : 남수우
지도교수의 영문표기 : Soo-Woo Nam
학위논문 학위논문(석사) - 한국과학기술원 : 재료공학과,
서지주기 참고문헌 : p. 80-88
주제 Creep.
Heat resistant alloys.
크리프. --과학기술용어시소러스
초내열 합금. --과학기술용어시소러스
활성화 에너지. --과학기술용어시소러스
응력도 계수. --과학기술용어시소러스
Activation energy.
Stress exponenet.
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