Effect of Laser Angle Parameter in High Strength DP1200 Steel Fiber Laser Overlap Welding

Meryem Altay; Hakan Aydın

Makale detayları

Effect of Laser Angle Parameter in High Strength DP1200 Steel Fiber Laser Overlap Welding

Yazarlar:

Meryem Altay | Hakan Aydın

Yayıncı:

Çanakkale Onsekiz Mart University

Ana Başlıklar:

Engineering

Dergi:

Journal of Advanced Research in Natural and Applied Sciences Vol.9 Issue 1, pp.78-88

Belge Tipi:

Makale

Yayın Tarihi:

6/2023

Belge Dili:

Türkçe

Document ID (Org No.):

2001284615

pISSN:

2757-5195

Anahtar kelimeler:

Özet:

 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 mms 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.

 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 mms 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.

 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 mms 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.

 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 mms 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.

Makale detayları

Effect of Laser Angle Parameter in High Strength DP1200 Steel Fiber Laser Overlap Welding

Yazarlar:

Meryem Altay | Hakan Aydın

Yayıncı:

Çanakkale Onsekiz Mart University

Ana Başlıklar:

Engineering

Dergi:

Journal of Advanced Research in Natural and Applied Sciences Vol.9 Issue 1, pp.78-88

Belge Tipi:

Makale

Yayın Tarihi:

6/2023

Belge Dili:

Türkçe

Document ID (Org No.):

2001284615

pISSN:

2757-5195

Laser welding

welding parameters

fracture surface

mechanical properties

DP1200 steel

Lazer kaynak

kaynak işlem parametreleri

kırılma yüzeyi

mekanik özellikler

DP1200 çeliği

Sayı

Makale detayları

Yazarlar: Meryem Altay | Hakan Aydın

Yayıncı: Çanakkale Onsekiz Mart University

Ana Başlıklar: Engineering

Dergi: Journal of Advanced Research in Natural and Applied Sciences Vol.9 Issue 1, pp.78-88

Belge Tipi: Makale

Yayın Tarihi: 6/2023

Belge Dili: Türkçe

Document ID (Org No.): 2001284615

pISSN: 2757-5195

Sayı

Yazarlar:

Meryem Altay | Hakan Aydın

Yayıncı:

Çanakkale Onsekiz Mart University

Ana Başlıklar:

Engineering

Dergi:

Journal of Advanced Research in Natural and Applied Sciences Vol.9 Issue 1, pp.78-88

Belge Tipi:

Makale

Yayın Tarihi:

6/2023

Belge Dili:

Türkçe

Document ID (Org No.):

2001284615

pISSN:

2757-5195