고장력강을 이용한 수소 확산거동에 관한 연구 = A Study of Hydrogen Diffusion Behavior of Using High-tensile strength Steel

다국어 초록 (Multilingual Abstract)

This study which used electric chemical method researched hydrogen diffusion behavior being melted in high-tensial strength steel. It partially measured a little capacity of water emitting from the surface of test speciment with the no-load neglect test and delay fracture test, and so forth by test speciment given tension fracture test and paused change. The result is as follows;
1) There were two phenomena in the transportation of hydrogen by the movement of dislocation. When the strain velocity was low, hydrogen existing around dislocation was transported together with dislocation because it draws down by stress field. In the case that the strain velocity was high, hydrogen existing in grid was transported of Sweep by the movement of dislocation.
2. Hydrogen equally distributed in steel was redistributed with dislocation in the process of time. after that, because hydrogen was dispersed from dislocation, it was confirmed to be absent from the surface of steel.
3. The more the quantity of plasticity strain was, Deff, roughly diffusion integral number, was less than D_L, diffusion integral number in a grid. So, the more the quantity of plasticity strain was, the less Deff was.
(4) In the state of right load, the influence of load strain was higher than plasticity strain of the hydrogen diffusion as a test speciment.

목차 (Table of Contents)

• 목차
• List of Tables = iii
• List of Figures = iv
• List of Photograph = vii
• 제1장 서론 = 1
• 제2장 시험재료 및 시험편 형상 = 3
• 2.1 시험 재료 = 3
• 2.2 시편형상 = 4
• 제3장 실험장치 및 실험방법 = 6
• 3.1 수소첨가법 = 6
• 3.2 전기화학적 수소측정법 = 7
• 3.3 수소방출 실험 = 10
• 3.3.1 인장파단 시험 = 10
• 3.3.2 예변형을 준 시편에 대한 무부하방치시험 = 10
• 3.3.3 지연 파괴시험 = 11
• 제4장 실험결과 = 12
• 4.1 인장파단 시험결과 = 12
• 4.2 인장파단시험에 있어서의 수소방출 = 13
• 4.3 예변형을 준 시편에 의한 무부하 방치시의 수소의 방출 = 20
• 4.4 지연 파괴 시험 결과 = 23
• 4.5 지연파괴시의 수소방출 = 23
• 제5장 고찰 = 28
• 5.1 수소방출과정의 관계이론 = 28
• 5.2 소성변형에 의한 수소방출현상 = 31
• 5.2.1 소성변형시의 수소의 방출 = 31
• 5.2.2 소성변형시의 수소방출현상에 미치는 시효시간과 변형속도의 영향 = 33
• 5.3 수소확산거동에 미치는 소성변형의 영향 = 40
• 5.4 지연파괴 발생까지의 수소의 거동 = 46
• 제6장 결론 = 51
• 참고문헌 = 52
• 영문초록 = 54