[A+] 성균관대 고역실 Microscope 레포트

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"[A+] 성균관대 고역실 Microscope 레포트"에 대한 내용입니다.

목차

1. Abstract
2. Introduction
3. Methods
4. Results
5. Discussion
6. Conclusion
7. References

본문내용

Abstract
In this experiment, surfaces of SM20C steel specimens were observed under metallurgical microscope up to magnification of x1,000 to confirm how polishing and etching procedure work on the specimen. Rust was removed from the surface after polishing, but grain boundary could not be observed, and white area of ferrite and black area of pearlite microstructure could be observed on the surface after etching. Then, the average grain size and yield strength of the specimen was determined following ASTM specification, which was and , respectively. Moreover, by inferring the heat treatment of the specimen, the purpose and method of heat treatment, and the microstructure of the steel specimen were analyzed.

1. Introduction
1.1. Objective of Experiment
본 실험의 목적은 열처리 공정과 금속의 특성을 이해하는 것이다. 이를 위해 polishing과 etching이 완료된 SM20C 탄소강 표면의 변화를 육안과 금속현미경으로 관찰했으며, 이를 바탕으로 금속 시료의 결정립계를 분석하였다. 따라서 본 실험으로 시료 관찰 전 열처리 방법 및 목적, 금속 표면의 미세구조를 이해할 수 있다.

참고 자료

Ostrovski, Oleg & Belashchenko, David. (2013). Thermophysical properties and structure of liquid Fe-C alloys. High Temperatures - High Pressures. 42. 137-149.
Askeland Donald R and Wendelin J Wright. 2014. Essentials of Materials Science and Engineering Third ed. Stamford CT: Cengage Learning.
ASTM international, “Standard Test Methods for Determining Average Grain Size”, ASTM E112-96, 9.
강용준,오창영,이승건,이상훈,and 강성식. "탄소강 모재의 기계적 특성과 미세조직에 미치는 용접후열처리 온도의 영향." 대한용접·접합학회지 39.6 (2021): 582-589.