금속표면 특성향상을 위한 Iaser peening 효과

• 영문명: The Laser Peening Effect for Improving the Surface Properties of Metals
• 발행기관: 한국레이저가공학회
• 저자명: 정진만(Chin-Man Chung) 백성훈(Sung-Hoon Baik) 김정수(Joung-Soo Kim) 이상배(Sang-Bae Lee)
• 간행물 정보: 『한국레이저가공학회지』한국레이저가공학회지 제11권 제3호, 5~9쪽, 전체 5쪽
• 주제분류: 공학 > 기계공학
• 파일형태: PDF
• 발행일자: 2008.09.30

영문 초록

  The effect of a laser peening on the surface residual stress of SUS 304 was investigated using a second harmonic Nd:YAG laser beam. The energy density and the diameter of the laser beam were 400 mJ/㎟ and about 1㎜, respectively. According to the test results, the effect of a laser peening for improving the surface residual stress was not big enough to induce a high compressive stress on the SUS 304 surface. This is thought to be attributed to the small radius of the laser beam used in this study, even though its energy density is big enough. From this study, it can be concluded that to induce a recognizably high compressive stress on a metal surface, the energy density as well as the size (diameter) of the laser beam should be large enough to generate surface plasma with a high energy to have a big impact to a metal surface.

목차

ABSTRACT
1. 서론
2. 펄스 레이저에 의한 충격파 발생원리
3. 실험 장치 및 방법
4. 실험 결과 및 고찰
5. 결론
후기
참고문헌

키워드

Laser Peening Residual stress improvement