수소 장입된 극저온용 철강 소재의 수소 취성 민감도 특성 평가Part II : 기계 물성 평가

다국어 초록 (Multilingual Abstract)

Hydrogen is one of the main candidates in replacing fossil fuels in the forthcoming years. However, hydrogen technologies must deal with safety aspects due to the specific sub�stance properties. This study aims to provide an overview on the loss of mechanical properties of cryogenic materials, which may lead to serious consequences, such as fires and explosions. The hydrogen embrittlement of cryogenic steels was investigated through slow strain rate tensile tests (SSRTs) and thermal desorption analyses of electrochemically H-charged specimens. As a prior study to confirm mechanical properties under liquid hydrogen conditions, the amount of diffusive hydrogen that causes hydrogen embrittlement was confirmed after charging hydrogen using an electrochemical method for 4 types of steel materials applied as cryogenic materials did. When exposed to the same hydrogen charging conditions, the amount of hydrogen diffused into the 9% nickel steel is the highest compared to the austenitic steel type. It is considered that this is because the diffusion and integration of hydrogen into the interior is easy. It is necessary to analyze the relationship between hydrogen loading and mechanical properties, and this will be carried out in a follow-up study.

목차 (Table of Contents)

• ABSTRACT
• 1. 서론
• 2. 실험 방법
• 2.1 실험 재료
• 2.2 미소인장시험편
• 2.3 수소 장입 방법 및 조건
• 2.4 저속 변형 속도 시험(SSRT)
• 2.5 충격 인성 평가
• 3. 시험 결과 및 고찰
• 3.1 상온 SSRT 시험 결과
• 3.2 극저온(-196℃)SSRT 시험결과
• 3.3 충격 인ㅇ성 평가
• 4. 논의
• 5. 결론
• 후기
• References

참고문헌 (Reference)

1 김재웅, "선박 극저온 탱크용 9% 니켈강 소재 FCAW 맞대기 용접 연구 PART I : 용접부 신뢰성 연구" 한국기계기술학회 23 (23): 354-359, 2021

2 이승용, "고압 수소 가스 하 인장 시험을 이용한 두 오스테나이트계고망간강의 수소취화 특성 평가" 한국재료학회 26 (26): 353-358, 2016

3 Djukic MB, "The synergistic action and interplay of hydrogen embrittlement mechanisms in steels and iron : Localized plasticity and decohesion" 216 : 106528-, 2019

4 Kamikawa N, "Tensile behavior of ferrite-martensite dual phase steels with nano-precipitation of vanadium carbides" 55 : 1781-1790, 2015

5 Hryniewicz T, "SIMS analysis of hydrogen content in near surface layers of AISI 316L SS after electrolytic polishing under different conditions" 205 : 4228-4236, 2011

6 A. Barnoush, "Recent developments in the study of hydrogen embrittlement : hydrogen effect on dislocation nucleation" 58 (58): 74-85, 2010

7 D. Mori, "Recent challenges of hydrogen storage technologies for fuel cell vehicles" 34 (34): 4569-4574, 2009

8 M. Dadfarnia, "Recent advances in the study of structural materials compatibility with hydrogen" 22 (22): 2010

9 Koyama, M, "Overview of hydrogen embrittlement in high-Mn steels" 42 (42): 12706-12723, 2017

10 Davies RG, "Influence of martensite content on the hydrogen embrittlement of dual-phase steels" 17 : 889-892, 1983

11 Bag A, "Influence of martensite content and morphology on tensile and impact properties of high-martensite dual-phase steels" 30 : 1193-1202, 1999

12 D. Sampath, "Hydrogen-Assisted Cracking Behavior of Ni Alloy 718 : Microstructure, H Testing Protocol, and Fractography" 52 : 46-64, 2021

13 Akiyama, E., "Hydrogen entry into Fe and high strength steels under simulated atmospheric corrosion" 56 : 1799-1805, 2011

14 Ogata, "Hydrogen Environment Embrittlement on Austenitic Stainless Steels from Room Temperature to Low Temperatures" 102 : 012005-, 2015

15 T. Ogata, "HYDROGEN ENVIRONMENT EMBRITTLEMENT EVALUATION IN FATIGUE PROPERTIES OF STAINLESS STEEL SUS304L AT CRYOGENIC TEMPERATURES" AIP 2010

16 Dong, C., "Effects of hydrogen-charging on the susceptibility of X100 pipeline steel to hydrogen-induced cracking" 34 : 9879-9884, 2009

17 Momotani, Y., "Effect of strain rate on hydrogen embrittlement in low-carbon martensitic steel" 42 : 3371-3379, 2016

18 Kheradmand N, "Effect of hydrogen on the hardness of different phases in super duplex stainless steel" 41 : 704-712, 2016

19 S. Dwivedi, "Effect of hydrogen in advanced high strength steel materials" (51) : 28007-28030, 2019

20 S. Deya, "Effect of Hydrogen on Mechanical Degradation and Fatigue in 7075 Aluminium Alloy with In-situ Hydrogenation" 114 : 461-469, 2015

21 Aoki, M., "Deformation microstructures of a low carbon steel characterized by tritium autoradiography and thermal desorption spectroscopy" 58 : 1141-1148, 1994

22 E. Merson, "Confocal laser scanning microscopy : the technique for quantitative fractographic analysis" 183 : 147-158, 2017

23 Chida T, "Comparison of constant load, SSRT and CSRT methods for hydrogen embrittlement evaluation using round bar specimens of high strength steels" 56 : 1268-1275, 2016

24 Nguyen, L., "Charpy Impact Properties of Hydrogen-Exposed 316L Stainless Steel at Ambient and Cryogenic Temperatures" 9 : 625-, 2019

25 L. Fournier, "Cathodic hydrogen embrittlement in alloy 718" 269 (269): 111-119, 1999

26 Liu, Q., "A critical review of the influence of hydrogen on the mechanical properties of medium-strength steels" 31 : 85-103, 2013

27 Bal B., "A New Venue Toward Predicting the Role of Hydrogen Embrittlement on Metallic Materials" 1 : 1-14, 2016