서지주요정보
Zircaloy-4의 응력 부식 균열에 영향을 미치는 인자에 대한 연구 = A study on factors affecting stress corrosion cracking of zircaloy-4
서명 / 저자 Zircaloy-4의 응력 부식 균열에 영향을 미치는 인자에 대한 연구 = A study on factors affecting stress corrosion cracking of zircaloy-4 / 정승욱.
저자명 정승욱 ; Jung, Sung-Uk
발행사항 [서울 : 한국과학기술원, 1985].
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소장정보

등록번호

4103453

소장위치/청구기호

학술문화관(문화관) 보존서고

MMS 8556

SMS전송

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초록정보

Effects of iodine concentration, stress, and strain rate on stress corrosion cracking (SCC) of stress-relieved zircaloy-4 tube in iodine vapor were investigated by an internal pressurization method and by a constant strain-rate method at temperature ranging from 573 to 673˚K. Stress corrosion cracking was observed when iodine concentration exceeded a critical value of 0.2 mg/㎠ at 603˚K. The failure time was found to decrease with increasing stress. At iodine concentration of 0.8 mg/㎠ and at temperature at 603˚K, the following relationship was found between the failure time (tf) and the hoop stress(σ) at stresses above the threshold level of 380MPa. $tf=8.84\times10^8\exp(-0.045\sigma)$ Using specimens with internal surface flaws, the relationship between crack growth rate (da/dt) and stress intensity factor (K) was established as follows. $da/dt=3.8\times10^{-9}K^{6.3}(mm/\sec)$ The SCC resistivity was found to be minimum at a certain strain rate. The strain rate corresponding to this minimum resistivity increased as the temperature increased. This phenomenon is considered to be related to the rate of formation of protective film on zircaloy surface.

서지기타정보

서지기타정보
청구기호 {MMS 8556
형태사항 iii, 40 p. : 삽도 ; 26 cm
언어 한국어
일반주기 저자명의 영문표기 : Sung-Uk Jung
지도교수의 한글표기 : 임창생
지도교수의 영문표기 : Chang-Saeng Rim
학위논문 학위논문(석사) - 한국과학기술원 : 재료공학과,
서지주기 참고문헌 : p. 37-40
주제 Stress corrosion.
Fractures.
응력 부식. --과학기술용어시소러스
파괴. --과학기술용어시소러스
변형률. --과학기술용어시소러스
응력 집중 계수. --과학기술용어시소러스
Stress intensity factor.
Zircaloy.
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