Earticle

초록

영어

The Small Punch Test (SPT) was developed to evaluate the softening and embrittlement of materials such as power plants and nuclear fusion reactors by taking samples in the field. Specimens used in the SPT are very thin and small disk-shaped compared to specimens for general tensile test, and thus have economic advantages in terms of miniaturization and repeatability of the test. The cryogenic SPT can also be miniaturized and has a significantly lower heat capacity than conventional universal test machines. This leads to reduced cooling and warm-up times. In this study, the cryogenic SPT was developed by modifying the existing room temperature SPT to be cooled by liquid nitrogen using a super bellows and a thermal insulation structure. Since the cryogenic SPT was first developed, basic experiments were conducted to verify the effectiveness of it. For the validation, aluminum alloy 6061- T6 specimens were tested for mechanical properties at room and cryogenic temperature. The results of the corrected tensile properties from the SPT experiment results were compared with known room temperature and cryogenic properties. Based on the correction results, the effectiveness of the cryogenic SPT test was confirmed, and the surface fracture characteristics of the material were analyzed using a 3d image scanner. In the future, we plan to conduct property evaluation according to the development of various alloy materials.

목차

Abstract
1. INTRODUCTION
2. Estimation of mechanical properties through SPT
2.1. Force-Displacement Curve
2.2. Mechanical property estimation
3. Experimental setup
3.1. Cryogenic Small Punch Device
4. Experiment results
4.1. Small Punch Test Device Validation
4.2. Mechanical properties evaluation
4.3. Surface fracture characteristic of specimen
5. Conclusion
ACKNOWLEDGMENT
REFERENCES

키워드

저자

• Hojun Cha [ Smart Manufacturing Engineering, Changwon National University, Republic of Korea ]
• Seungmin Jeon [ Department of Special Alloys, Extreme Materials Institute Korea Institute of Materials Science, Republic of Korea ]
• Donghyeon Yoon [ Mechanical Engineering, Changwon National University, Republic of Korea ]
• Jisung Yoo [ Department of Hydrogen Materials Evaluation, Extreme Materials Institute Korea Institute of Materials Science, Republic of Korea ]
• Seunggun Lee [ Department of Hydrogen Materials Evaluation, Extreme Materials Institute Korea Institute of Materials Science, Republic of Korea ]
• Seokho Kim [ Mechanical Engineering, Changwon National University, Republic of Korea ] Corresponding Author

참고문헌

발행기관

간행물

표지보기 관심저널 등록

• 간행물명

  한국초전도·저온논문지 (구 한국초전도저온공학회논문지) [Progress in Superconductivity and Cryogenics]

• 간기

  계간

• pISSN

  1229-3008

• eISSN

  2287-6251

• 수록기간

  1999~2026

• 등재여부

  KCI 등재,SCOPUS

• 십진분류

  KDC 427 DDC 537