원문정보
초록
영어
In this study, the laser welding experiments were performed with the 1 mm thickness of Al 6061-T6 using by 5 kW fiber laser welding system. The optimum laser welding condition of the lap joint has been investigated by analyzing the penetration depth and the porosity fraction through observation of the cross-sections. Based on the test results, the sound joint was obtained from the welding condition with the power of 2 kW and the focal position of -0.8 mm at the continuous laser welding speed of 2 mpm. Also, the tensile strength of the sound joint after heat treatment(170℃, 12hr) was increased almost 87% that of the base material. Especially, the fatigue test result of the sound joint showed that the fatigue cycle was 3×10 4 at the highest test load of 100 MPa.
목차
1. 서론
2. 실험 방법
3. 실험 결과 및 고찰
3.1 레이저 용접공정 최적화
3.2 용접부 기공 결함 조사
3.3 레이저 용접부 특성 평가
4. 결론
References