Abstract
Authors developed the high-performance microwelding of aluminum alloy, in which the superposition of continuous diode laser of wavelength 808nm and pulsed Nd:YAG laser of wavelength 1064nm could perform the high-processing speed, the deeper penetration depth and the wider bead width. However, the penetration depth at the beginning of laser scanning was insufficient, and the evaluation of cracks was not cleared yet. Therefore, in this study, the effects of preand post-heating with continuous diode laser on welding phenomena of aluminum alloy were experimentally and numerically investigated. The combination of continuous diode laser and pre-heating pulse of Nd:YAG laser without melting of specimen surface could keep the high surface temperature, which led to the stable deeper penetration and wider bead width with smooth surface integrity even at the beginning of laser scanning. Moreover, it was confirmed that the superposition of continuous diode laser was effective to improve a welding quality of aluminum alloy, since the superposition of continuous diode laser prevented rapid heating and cooling of aluminum alloy. The post-heating with continuous diode laser kept the gentle temperature gradient at the laser spot, and the generation of crack could be decreased by appropriate power and irradiation time of continuous diode laser.
| Original language | English |
|---|---|
| Title of host publication | 30th International Congress on Applications of Lasers and Electro-Optics, ICALEO 2011 |
| Pages | 825-832 |
| Number of pages | 8 |
| Publication status | Published - 2011 |
| Event | 30th International Congress on Applications of Lasers and Electro-Optics, ICALEO 2011 - Orlando, FL, United States Duration: Oct 23 2011 → Oct 27 2011 |
Other
| Other | 30th International Congress on Applications of Lasers and Electro-Optics, ICALEO 2011 |
|---|---|
| Country | United States |
| City | Orlando, FL |
| Period | 10/23/11 → 10/27/11 |
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ASJC Scopus subject areas
- Electrical and Electronic Engineering
- Electronic, Optical and Magnetic Materials
Cite this
Welding characteristics of aluminum alloy by pulsed nd : Yag laser with pre-and post-irradiation of superposed continuous diode laser. / Nakashiba, Shin Ichi; Okamoto, Yasuhiro; Sakagawa, Tomokazu; Miura, Kazuya; Okada, Akira; Uno, Yoshiyuki.
30th International Congress on Applications of Lasers and Electro-Optics, ICALEO 2011. 2011. p. 825-832.Research output: Chapter in Book/Report/Conference proceeding › Conference contribution
}
TY - GEN
T1 - Welding characteristics of aluminum alloy by pulsed nd
T2 - Yag laser with pre-and post-irradiation of superposed continuous diode laser
AU - Nakashiba, Shin Ichi
AU - Okamoto, Yasuhiro
AU - Sakagawa, Tomokazu
AU - Miura, Kazuya
AU - Okada, Akira
AU - Uno, Yoshiyuki
PY - 2011
Y1 - 2011
N2 - Authors developed the high-performance microwelding of aluminum alloy, in which the superposition of continuous diode laser of wavelength 808nm and pulsed Nd:YAG laser of wavelength 1064nm could perform the high-processing speed, the deeper penetration depth and the wider bead width. However, the penetration depth at the beginning of laser scanning was insufficient, and the evaluation of cracks was not cleared yet. Therefore, in this study, the effects of preand post-heating with continuous diode laser on welding phenomena of aluminum alloy were experimentally and numerically investigated. The combination of continuous diode laser and pre-heating pulse of Nd:YAG laser without melting of specimen surface could keep the high surface temperature, which led to the stable deeper penetration and wider bead width with smooth surface integrity even at the beginning of laser scanning. Moreover, it was confirmed that the superposition of continuous diode laser was effective to improve a welding quality of aluminum alloy, since the superposition of continuous diode laser prevented rapid heating and cooling of aluminum alloy. The post-heating with continuous diode laser kept the gentle temperature gradient at the laser spot, and the generation of crack could be decreased by appropriate power and irradiation time of continuous diode laser.
AB - Authors developed the high-performance microwelding of aluminum alloy, in which the superposition of continuous diode laser of wavelength 808nm and pulsed Nd:YAG laser of wavelength 1064nm could perform the high-processing speed, the deeper penetration depth and the wider bead width. However, the penetration depth at the beginning of laser scanning was insufficient, and the evaluation of cracks was not cleared yet. Therefore, in this study, the effects of preand post-heating with continuous diode laser on welding phenomena of aluminum alloy were experimentally and numerically investigated. The combination of continuous diode laser and pre-heating pulse of Nd:YAG laser without melting of specimen surface could keep the high surface temperature, which led to the stable deeper penetration and wider bead width with smooth surface integrity even at the beginning of laser scanning. Moreover, it was confirmed that the superposition of continuous diode laser was effective to improve a welding quality of aluminum alloy, since the superposition of continuous diode laser prevented rapid heating and cooling of aluminum alloy. The post-heating with continuous diode laser kept the gentle temperature gradient at the laser spot, and the generation of crack could be decreased by appropriate power and irradiation time of continuous diode laser.
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M3 - Conference contribution
AN - SCOPUS:82655177630
SP - 825
EP - 832
BT - 30th International Congress on Applications of Lasers and Electro-Optics, ICALEO 2011
ER -