Analysis of HAZ with Ansys in S355jr Structural Steels Joined by Flash Butt Welding

Uğur Arabacı

Makale detayları

Analysis of HAZ with Ansys in S355jr Structural Steels Joined by Flash Butt Welding

Yazarlar:

Uğur Arabacı

Yayıncı:

Gazi University

Ana Başlıklar:

Sonlu Elemanlar Analizi | Malzeme Bilimi ve Teknolojileri | Kaynak Teknolojileri

Dergi:

Politeknik Dergisi Vol.27 Issue 6, pp.2173-2179

Belge Tipi:

Makale

Yayın Tarihi:

12/2024

Belge Dili:

İngilizce

Document ID (Org No.):

2001333521

pISSN:

2147-9429

Anahtar kelimeler:

Özet:

 In this study, we focus on predicting the HAZ, which is a region whose mechanical properties are not clearly known, by modeling factors such as temperature input and heat turbulence, which may have different properties in the welding region. This is important for the safety of welded structures, because if the mechanical and thermal properties of these structures, which are used in many areas, can be determined in advance, they can be used more safely. In the study, flash butt welding method was preferred and holes were opened at regular intervals in the samples that were brought to appropriate dimensions for the welding process, and temperature values were measured and recorded using thermocouples and data loggers during the welding process. Additionally, the maximum temperature reached in the welding area was measured using a thermal camera during welding. Microstructural changes occurring in the joining regions of the welded test pieces were examined using light microscopy and scanning electron microscopy SEM. Micro hardness measurements were made to determine mechanical properties. Using the ANSYS program, three-dimensional models were created using the finite element method under the same experimental conditions and compared with the experimental results. As a result of this comparison, it was seen that the findings were compatible with the actual results. For this reason, it is emphasized that the use of simulation programs is important to predict the properties of welded structures and possible problems.

 In this study, we focus on predicting the HAZ, which is a region whose mechanical properties are not clearly known, by modeling factors such as temperature input and heat turbulence, which may have different properties in the welding region. This is important for the safety of welded structures, because if the mechanical and thermal properties of these structures, which are used in many areas, can be determined in advance, they can be used more safely. In the study, flash butt welding method was preferred and holes were opened at regular intervals in the samples that were brought to appropriate dimensions for the welding process, and temperature values were measured and recorded using thermocouples and data loggers during the welding process. Additionally, the maximum temperature reached in the welding area was measured using a thermal camera during welding. Microstructural changes occurring in the joining regions of the welded test pieces were examined using light microscopy and scanning electron microscopy SEM. Micro hardness measurements were made to determine mechanical properties. Using the ANSYS program, three-dimensional models were created using the finite element method under the same experimental conditions and compared with the experimental results. As a result of this comparison, it was seen that the findings were compatible with the actual results. For this reason, it is emphasized that the use of simulation programs is important to predict the properties of welded structures and possible problems.

 In this study, we focus on predicting the HAZ, which is a region whose mechanical properties are not clearly known, by modeling factors such as temperature input and heat turbulence, which may have different properties in the welding region. This is important for the safety of welded structures, because if the mechanical and thermal properties of these structures, which are used in many areas, can be determined in advance, they can be used more safely. In the study, flash butt welding method was preferred and holes were opened at regular intervals in the samples that were brought to appropriate dimensions for the welding process, and temperature values were measured and recorded using thermocouples and data loggers during the welding process. Additionally, the maximum temperature reached in the welding area was measured using a thermal camera during welding. Microstructural changes occurring in the joining regions of the welded test pieces were examined using light microscopy and scanning electron microscopy SEM. Micro hardness measurements were made to determine mechanical properties. Using the ANSYS program, three-dimensional models were created using the finite element method under the same experimental conditions and compared with the experimental results. As a result of this comparison, it was seen that the findings were compatible with the actual results. For this reason, it is emphasized that the use of simulation programs is important to predict the properties of welded structures and possible problems.

 Bu çalışmada, mekanik özellikleri net olarak bilinemeyen bir bölge olan ITABın, kaynak bölgesinin farklı özelliklere sahip olabileceği sıcaklık girdisi ve ısı türbülansı gibi etmenlerin modelleme ile önceden tahmin edilmesi üzerine odaklanılmıştır. Bu, kaynaklı yapıların güvenliği açısından önemlidir, çünkü birçok alanda kullanılan bu yapıların mekanik ve termal özellikleri önceden belirlenebilirse, daha güvenli bir şekilde kullanılabilirler. Çalışmada yakma alın kaynağı yöntemi tercih edilmiş ve kaynak işlemi için uygun boyutlara getirilen numunelere belirli aralıklarla delikler açılarak, kaynak işlemi sırasında termokupl ve datalogger kullanılarak sıcaklık değerleri ölçülmüş ve kaydedilmiştir. Ayrıca, kaynak esnasında termal kamera kullanılarak kaynak bölgesinin ulaştığı maksimum sıcaklık da ölçülmüştür. Kaynaklı birleştirilen deney parçalarının birleştirme bölgelerinde meydana gelen mikroyapısal değişiklikler, ışık mikroskobu ve taramalı elektron mikroskobu SEM kullanılarak incelenmiştir. Mekanik özelliklerin belirlenmesinde mikro sertlik ölçümleri yapılmıştır. ANSYS programı kullanılarak sonlu elemanlar yöntemiyle aynı deneysel şartlarda üç boyutlu modellemeler oluşturulmuş ve deneysel sonuçlarla karşılaştırılmıştır. Bu karşılaştırma sonucunda, elde edilen bulguların gerçek sonuçlarla uyumlu olduğu görülmüştür. Bu nedenle, simülasyon programlarının kullanımının, kaynaklı yapıların özelliklerinin ve olası sorunların önceden tahmin edilebilmesi için önemli olduğu vurgulanmıştır.

Makale detayları

Analysis of HAZ with Ansys in S355jr Structural Steels Joined by Flash Butt Welding

Yazarlar:

Uğur Arabacı

Yayıncı:

Gazi University

Ana Başlıklar:

Sonlu Elemanlar Analizi | Malzeme Bilimi ve Teknolojileri | Kaynak Teknolojileri

Dergi:

Politeknik Dergisi Vol.27 Issue 6, pp.2173-2179

Belge Tipi:

Makale

Yayın Tarihi:

12/2024

Belge Dili:

İngilizce

Document ID (Org No.):

2001333521

pISSN:

2147-9429

Flash butt welding

ansys

thermal analysis

welding metallurgy

structural steelsYakma alın kaynağı

ansys

termal analiz

kaynak metalurjisi

yapı çelikleri

Sayı

Makale detayları

Yazarlar: Uğur Arabacı

Yayıncı: Gazi University

Ana Başlıklar: Sonlu Elemanlar Analizi | Malzeme Bilimi ve Teknolojileri | Kaynak Teknolojileri

Dergi: Politeknik Dergisi Vol.27 Issue 6, pp.2173-2179

Belge Tipi: Makale

Yayın Tarihi: 12/2024

Belge Dili: İngilizce

Document ID (Org No.): 2001333521

pISSN: 2147-9429

Sayı

Yazarlar:

Uğur Arabacı

Yayıncı:

Gazi University

Ana Başlıklar:

Sonlu Elemanlar Analizi | Malzeme Bilimi ve Teknolojileri | Kaynak Teknolojileri

Dergi:

Politeknik Dergisi Vol.27 Issue 6, pp.2173-2179

Belge Tipi:

Makale

Yayın Tarihi:

12/2024

Belge Dili:

İngilizce

Document ID (Org No.):

2001333521

pISSN:

2147-9429