서지주요정보
35wt.% $MgCl_2$ 수용액중에서 전위차법에 의한 304계 스텐레스강의 응력 부식균열 생성 및 전파의 거동에 관한 연구 = The behaviour of stress corrosion crack initiation and propagation of type 304 stainless steel in 35wt.% $MgCl_2$ by electrical potential method
서명 / 저자 35wt.% $MgCl_2$ 수용액중에서 전위차법에 의한 304계 스텐레스강의 응력 부식균열 생성 및 전파의 거동에 관한 연구 = The behaviour of stress corrosion crack initiation and propagation of type 304 stainless steel in 35wt.% $MgCl_2$ by electrical potential method / 이우봉.
발행사항 [서울 : 한국과학기술원, 1986].
Online Access 제한공개(로그인 후 원문보기 가능)원문

소장정보

등록번호

4103672

소장위치/청구기호

학술문화관(문화관) 보존서고

MMS 8630

휴대폰 전송

도서상태

이용가능(대출불가)

사유안내

반납예정일

리뷰정보

초록정보

The behaviour of stress corrosion (SC) crack initiation and propagation of type 304 stainless steel in 35wt.% $MgCl_2$ has been studied as a function of temperature and applied stress at the applied potential of -$106mV_{SHE}$ using electrical potential method under constant load. In the present work, the incubation and progagation periods for SC crack have been differentiated by the electrical potential method. The optical microscopy shows that the pit is a primary source of SC crack initiation under 212MPa (0.90YS). SC crack initiation stage is composed of three steps ; 1) pit initiation 2) Pit growth to critical size 3) Crack propagation in the lateral and through - thickness directions. The fractograpy of SC crack propagation shows the transition of fracture mode from fully transgranular mode to the mixed zone with intergranular mode in the interior of the specimen. The intergranular portion is nearly independent of temperature and increases with the applied stress. The activation energy of electrochemical reaction and the stress contribution for SC crack propagation under 212MPa are evaluated to be 63KJ/mole and 8KJ/mole, respectively. It is suggested that the former is for ion diffusion, anodic dissolution and repassivation reaction, the latter is for the destruction of the passivated film. The average SC crack propagation rate at 124℃ and - $106mV_{SHE}$ under 212MPa is calculated to be 1.24×$10^{-4}$mm/sec.

서지기타정보

서지기타정보
청구기호 {MMS 8630
형태사항 [iii], 52 p. : 삽화 ; 26 cm
언어 한국어
일반주기 저자명의 영문표기 : Woo-Bong Rhee
지도교수의 한글표기 : 변수일
지도교수의 영문표기 : Su-Il Pyun
학위논문 학위논문(석사) - 한국과학기술원 : 재료공학과,
서지주기 참고문헌 : p. 30-33
주제 Stress corrosion.
Steel, stainless.
Electrochemistry.
Fracture mechanics.
응력 부식 균열. --과학기술용어시소러스
스테인리스강. --과학기술용어시소러스
균열 전파. --과학기술용어시소러스
전기 화학 반응. --과학기술용어시소러스
QR CODE qr code