논문 상세보기
This paper investigates tensile characteristics of the stress aging heat-treated SM45C steel which are aging temperature at 250℃, 300℃, aging time at 1, 3 hours, and applied load at 300, 400N conditions by using acoustic emission. Most suitable aging condition was aging temperature 300℃, aging time 1 hour, and aging applied load 300N. And increased yield load 28.3% than non-treatment specimen in this condition. AE energy in elastic limit increased about 16.7 times than non-treatment specimen. When aging time is 3 hours, yield load decreased than other conditions that possibility is high to have itself defect on inside the specimen or coarse grain size precipitation is different in happened over-aging phenomenon. Especially, in case of 300℃, 3 hours and 400N condition appeared AE energy in elastic limit fairly high about 30 times than non-treatment specimen. This is considered by emit a lot of energies when material causes plastic deformation because the ductility increases on specimen by over-aging phenomenon.
1. 서론
2. 실험재료 및 방법
2.1 실험재료 및 시험편
2.2 실험장치 및 방법
3. 실험결과 및 고찰
3.1 인장시험의 경우
3.2 AE시험의 경우
4. 결론
5. 참고문헌
