Öz
Çalışma kapsamında yüksek mukavemete sahip DP 1200 çelik malzemenin, fiber lazer kaynak işlemiyle birleştirilmesi bindirme formunda yapılmıştır. Lazer gücü (2500 W) ve ilerleme hızı (55 mm/s) sabit tutularak lazer açısı (70ᵒ, 80ᵒ, 90ᵒ) değişiminin kaynaklı bağlantıların kaynak dikiş yüzeyi, kaynak geometrisi, kırılma yüzeyleri ve mekanik özelliklere etkisi incelenmiştir. Lazer kaynaklı numunelerin arka yüzeylerinde, ön yüzeylerine göre sıçrama etkilerinin (spatter effect) daha fazla olduğu tespit edilmiştir. Eşit ısı girdisinde lazer açısının, ara seviyede kullanılmasındansa düşük (70ᵒ) ya da yüksek seviye (90ᵒ) kullanılmasının kaynak geometrisinde optimum sonuçlar vereceği tespit edilmiştir. Çekme testinde yüksek kuvvet ve yüzde uzama değerleri elde edilmiştir: 70ᵒ lazer açısına sahip numunede maksimum kesme kuvveti 5.8266 kN olarak elde edilmiştir. Ayrıca kesme kuvveti ile kaynak geometrisindeki erime bölgesinde ölçülen tam birleşme mesafesi (bonding) arasında ilişki kurulmuştur. Düşük lazer açısı parametresi (70ᵒ) ile üretilen numunelerde yüksek gevrekliğin göstergesi klivaj kırılmalar gözlenmiştir; yüksek lazer açısı (90ᵒ) ile üretilen numunelerde ise kırılma yüzeyleri sünektir, oluşan çukurlar küçük boyutludur. Lazer açısının yüksek dereceye sahip olması (90ᵒ), kırılmanın gerçekleştiği bölgenin Isı Tesiri Altındaki Bölge içerisinde yer almasına neden olmuştur
Anahtar Kelimeler
Lazer kaynak kaynak işlem parametreleri kırılma yüzeyi mekanik özellikler DP1200 çeliği
Destekleyen Kurum
Bursa Uludağ Üniversitesi
Proje Numarası
OUAP (MH)-2019-6
Kaynakça
- Ai, Y., Wang, J., Jiang, P., Liu, Y. ve Liu, W. (2017). Parameters optimization and objective trend analysis for fiber laser keyhole welding based on Taguchi-FEA. International Journal of Advanced Manufac-turing Technology, 90(5–8), 1419–1432. https://doi.org/10.1007/s00170-016-9403-9
- Bandyopadhyay, K., Panda, S. K., Saha, P., Baltazar-Hernandez, V. H. ve Zhou, Y. N. (2016). Mic-rostructures and failure analyses of DP980 laser welded blanks in formability context. Materials Science and Engineering A, 652, 250–263. https://doi.org/10.1016/j.msea.2015.11.091
- Buddu, R. K., Chauhan, N., Raole, P. M. ve Natu, H. (2015). Studies on mechanical properties, mic-rostructure and fracture morphology details of laser beam welded thick SS304L plates for fusion reactor applications. Fusion Engineering and Design, 95, 34–43. https://doi.org/10.1016/j.fusengdes.2015.04.001
- Chen, Z., Yang, S., Wang, C., Hu, X., Shao, X. ve Wang, J. (2014). A study of fiber laser welding of galvanized steel using a suction method. Journal of Materials Processing Technology, 214(7), 1456–1465. https://doi.org/10.1016/j.jmatprotec.2014.02.013
- Datta, S., Raza, M. S., Das, A. K., Saha, P. ve Pratihar, D. K. (2020). Experimental investigations and parametric optimization of laser beam welding of NiTinol sheets by metaheuristic techniques and desi-rability function analysis. Optics and Laser Technology, 124(October 2019), 105982. https://doi.org/10.1016/j.optlastec.2019.105982
- Kouadri-Henni, A. (2017). Effect of welding laser process on macrostructures and the mechanical properties of coating steel DP600: Influence of vaporization zinc. Journal of Manufacturing Processes, 30, 83–96. https://doi.org/10.1016/j.jmapro.2017.07.025
- Lakshminarayana, P. V. S., Gautam, J. P., Mastanaiah, P., Reddy, G. M. ve Sankara Rao, K. B. (2018). Influence of Beam Power and Traverse Speed in Fibre Laser welding of Dual phase steel (590) on Depth of weld zone penetration, Microstructure and Hardness. Materials Today: Proceedings, 5(9), 17132–17138. https://doi.org/10.1016/j.matpr.2018.04.121
- Li, L., Zheng, J. ve Wang, C. (2020). Fatigue behavior improvements of laser-induction hybrid wel-ded S690QL steel plates. Optics and Laser Technology, 126(106101). https://doi.org/10.1016/j.optlastec.2020.106101
- Liu, G., Gao, X. D., Peng, C., Liu, X. H., Huang, Y. J., Zhang, Y. ve You, D. Y. (2020). Tensile re-sistance, microstructures of intermetallic compounds, and fracture modes of welded steel/aluminum joints produced using laser lap welding. Transactions of Nonferrous Metals Society of China, 30(10), 2639–2649. https://doi.org/10.1016/S1003-6326(20)65408-5
- Manonmani, K., Murugan, N. ve Buvanasekaran, G. (2007). Effects of process parameters on the bead geometry of laser beam butt welded stainless steel sheets. International Journal of Advanced Manufac-turing Technology, 32(11–12), 1125–1133. https://doi.org/10.1007/s00170-006-0432-7
- Zhang, M. J., Chen, G. Y., Zhou, Y., Li, S. C. ve Deng, H. (2013). Observation of spatter formation mechanisms in high-power fiber laser welding of thick plate. Applied Surface Science, 280, 868–875. https://doi.org/10.1016/j.apsusc.2013.05.081
- Zhang, S., Sun, J., Zhu, M., Zhang, L., Nie, P. ve Li, Z. (2020). Fiber laser welding of HSLA steel by autogenous laser welding and autogenous laser welding with cold wire methods. Journal of Materials Processing Technology, 275(May 2019), 116353. https://doi.org/10.1016/j.jmatprotec.2019.116353
Öz
In this study, high-strength DP 1200 steel plates were welded with fiber laser welding method in the form of overlapping without gaps. The effects of the laser angle (70ᵒ, 80ᵒ, 90ᵒ) changed on the weld bead surface, weld geometry, fracture surfaces and mechanical properties were investigated by keeping the laser power (2500 W), and the scanning speed (55 mm/s) was constant. It has been determined that the rear surfaces of the laser-welded specimens have more spatter effects than the front surfaces. Low level (70ᵒ) or high level (90ᵒ) laser angle was achieved a good result in terms of weld geometry rather than an intermediate level. High strength and relatively high percent elongation values were obtained in the tensile test: the highest shear force was achieved as 5.8266 kN in the sample with a laser angle of 70ᵒ. In addition, the shear force and the fusion zone bonding distance were correlated. Cleavage fractures in specimens produced with a low laser angle (70ᵒ), demonstrated high embrittlement; the fracture surfaces
were ductile and the voids formed were small in size in specimens manufactured with a high laser angle (90ᵒ). The high laser angle parameter (90ᵒ) was caused the fraction region to moved away from the weld center and stayed within the Heat Affected Zone (HAZ) region.
Anahtar Kelimeler
Laser welding welding parameters fracture surface mechanical properties DP1200 steel
Proje Numarası
OUAP (MH)-2019-6
Kaynakça
- Ai, Y., Wang, J., Jiang, P., Liu, Y. ve Liu, W. (2017). Parameters optimization and objective trend analysis for fiber laser keyhole welding based on Taguchi-FEA. International Journal of Advanced Manufac-turing Technology, 90(5–8), 1419–1432. https://doi.org/10.1007/s00170-016-9403-9
- Bandyopadhyay, K., Panda, S. K., Saha, P., Baltazar-Hernandez, V. H. ve Zhou, Y. N. (2016). Mic-rostructures and failure analyses of DP980 laser welded blanks in formability context. Materials Science and Engineering A, 652, 250–263. https://doi.org/10.1016/j.msea.2015.11.091
- Buddu, R. K., Chauhan, N., Raole, P. M. ve Natu, H. (2015). Studies on mechanical properties, mic-rostructure and fracture morphology details of laser beam welded thick SS304L plates for fusion reactor applications. Fusion Engineering and Design, 95, 34–43. https://doi.org/10.1016/j.fusengdes.2015.04.001
- Chen, Z., Yang, S., Wang, C., Hu, X., Shao, X. ve Wang, J. (2014). A study of fiber laser welding of galvanized steel using a suction method. Journal of Materials Processing Technology, 214(7), 1456–1465. https://doi.org/10.1016/j.jmatprotec.2014.02.013
- Datta, S., Raza, M. S., Das, A. K., Saha, P. ve Pratihar, D. K. (2020). Experimental investigations and parametric optimization of laser beam welding of NiTinol sheets by metaheuristic techniques and desi-rability function analysis. Optics and Laser Technology, 124(October 2019), 105982. https://doi.org/10.1016/j.optlastec.2019.105982
- Kouadri-Henni, A. (2017). Effect of welding laser process on macrostructures and the mechanical properties of coating steel DP600: Influence of vaporization zinc. Journal of Manufacturing Processes, 30, 83–96. https://doi.org/10.1016/j.jmapro.2017.07.025
- Lakshminarayana, P. V. S., Gautam, J. P., Mastanaiah, P., Reddy, G. M. ve Sankara Rao, K. B. (2018). Influence of Beam Power and Traverse Speed in Fibre Laser welding of Dual phase steel (590) on Depth of weld zone penetration, Microstructure and Hardness. Materials Today: Proceedings, 5(9), 17132–17138. https://doi.org/10.1016/j.matpr.2018.04.121
- Li, L., Zheng, J. ve Wang, C. (2020). Fatigue behavior improvements of laser-induction hybrid wel-ded S690QL steel plates. Optics and Laser Technology, 126(106101). https://doi.org/10.1016/j.optlastec.2020.106101
- Liu, G., Gao, X. D., Peng, C., Liu, X. H., Huang, Y. J., Zhang, Y. ve You, D. Y. (2020). Tensile re-sistance, microstructures of intermetallic compounds, and fracture modes of welded steel/aluminum joints produced using laser lap welding. Transactions of Nonferrous Metals Society of China, 30(10), 2639–2649. https://doi.org/10.1016/S1003-6326(20)65408-5
- Manonmani, K., Murugan, N. ve Buvanasekaran, G. (2007). Effects of process parameters on the bead geometry of laser beam butt welded stainless steel sheets. International Journal of Advanced Manufac-turing Technology, 32(11–12), 1125–1133. https://doi.org/10.1007/s00170-006-0432-7
- Zhang, M. J., Chen, G. Y., Zhou, Y., Li, S. C. ve Deng, H. (2013). Observation of spatter formation mechanisms in high-power fiber laser welding of thick plate. Applied Surface Science, 280, 868–875. https://doi.org/10.1016/j.apsusc.2013.05.081
- Zhang, S., Sun, J., Zhu, M., Zhang, L., Nie, P. ve Li, Z. (2020). Fiber laser welding of HSLA steel by autogenous laser welding and autogenous laser welding with cold wire methods. Journal of Materials Processing Technology, 275(May 2019), 116353. https://doi.org/10.1016/j.jmatprotec.2019.116353
Ayrıntılar
| Birincil Dil | Türkçe |
|---|---|
| Konular | Mühendislik |
| Bölüm | Makaleler |
| Yazarlar | |
| Proje Numarası | OUAP (MH)-2019-6 |
| Erken Görünüm Tarihi | 3 Mart 2023 |
| Yayımlanma Tarihi | 6 Mart 2023 |
| Gönderilme Tarihi | 12 Şubat 2022 |
| Yayımlandığı Sayı | Yıl 2023 Cilt: 9 Sayı: 1 |
Kaynak Göster
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