서지주요정보
3.5wt.%NaCl 수용액에서 AISI 4340 강의 응력부식균열 전파기구에 관한 연구 = A study on the mechanism of stress-corrosion crack propagation of AISI 4340 steel in aqueous 3.5wt.% NaCl solution
서명 / 저자 3.5wt.%NaCl 수용액에서 AISI 4340 강의 응력부식균열 전파기구에 관한 연구 = A study on the mechanism of stress-corrosion crack propagation of AISI 4340 steel in aqueous 3.5wt.% NaCl solution / 강인원.
저자명 강인원 ; Kang, In-Won
발행사항 [서울 : 한국과학기술원, 1986].
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소장정보

등록번호

4104051

소장위치/청구기호

학술문화관(문화관) 보존서고

MMS 8640

휴대폰 전송

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초록정보

The mechanism of stress-corrosion(SC) crack propagation of AISI 4340 steel in aqueous 3.5 wt.% NaCl solution at 30℃ has been investigated as a function of applied potential, stress state, the amount of dissolved oxygen, and tempering temperature over a range of applied potential from -140 to -1000 $m^V$_SHE. The continuous transition of the stress state from plane strain to plane stress was possible using 2 mm thick single edge-notched (SEN) specimens under constant load. The SC crack lengths were estimated by electrical potential method. As the amount of cathodic polarization was increased, the SC crack propagation rate was increased, whereas anodic polarization yielded the opposite results. These polarization effects can be attributed to the lowered reduction rate of hydrogen ions during anodic polarization. Because of the continuous change in the stress state, the usual rapid increase of SC crack propagation rate in V-K curve at high K, next to the region II, did not result in most cases, SC crack propagated with the intergranular fracture mode in the most region and dimpled rupture occurred near the surface in form of shear lip, irrespective of applied potential and tempering temperature. It was also found that the vigorous bubbling of $N_2$ gas for 3h accelerated the SC crack propagation rate. It was suggested from above experimental results that SC crack propagation is caused by hydrogen embrittlement. The effect of tempering temperature exhibited the decreasing order of resistance to SC cracking: 400℃, 200℃, and 300℃, and was discussed in terms of hydrogen embrittlement.

서지기타정보

서지기타정보
청구기호 {MMS 8640
형태사항 [iv], 64 p. : 삽도 ; 26 cm
언어 한국어
일반주기 저자명의 영문표기 : In-Won Kang
지도교수의 한글표기 : 변수일
지도교수의 영문표기 : Su-Il Pyun
학위논문 학위논문(석사) - 한국과학기술원 : 재료공학과,
서지주기 참고문헌 : p. 40-45
주제 Steel, stainless.
Stress corrosion.
Polarization (Electricity)
스테인리스강. --과학기술용어시소러스
응력 부식 균열. --과학기술용어시소러스
균열 전파. --과학기술용어시소러스
전기 화학 반응. --과학기술용어시소러스
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