Comparative Investigation of Edge Cracking Behavior in 600 MPa Dual Phase (DU) Steel Sheets from Different Manufacturers

Zeki Ahmet Ekmen; Yiğit Gönülalan; Onur Muratal; Diğdem Atabek

Article Details

Comparative Investigation of Edge Cracking Behavior in 600 MPa Dual Phase (DU) Steel Sheets from Different Manufacturers

Authors:

Zeki Ahmet Ekmen | Yiğit Gönülalan | Onur Muratal | Diğdem Atabek

Publisher:

Manisa Celal Bayar University

Main Topics:

Malzeme Karekterizasyonu

Journal:

Celal Bayar Üniversitesi Fen Bilimleri Dergisi Vol.21 Issue 3, pp.10-20

Document Type:

Article

Publication Date:

9/2025

Document Language:

English

Document ID (Org No.):

2001359117

pISSN:

1305-130X

Keywords:

Abstract:

 Recent advancements in the automotive industry have emphasized the importance of fuel efficiency, weight reduction, and durability. In response, AHSS materials have become widely used, particularly in cold forming. However, their high strength reduces formability, leading to challenges such as edge cracking. In this study, 600DU steel from two different mills was tested. Tensile tests were conducted on EU1 and EU2 at 0, 45, and 90 to the rolling direction per JIS Z 2241 No. 5. The tensile strength values were similar, but EU2 showed higher elongation. A hole expansion test revealed an average expansion of 27 for EU1 and 60 for EU2. Vickers hardness was measured under an HV 10 load. Metallographic preparation was followed by microstructural analysis using optical and SEM microscopy. In the AutoForm simulation analysis, the average thickness reduction of the EU1 steel was determined to be 19, while that of the EU2 steel was measured at 11. These results indicate that the EU1 steel exhibits 8 greater thinning compared to the EU2 steel. This study examines the formability of 600DU dual-phase AHSS steel from different manufacturers using numerical and experimental methods. The findings provide key insights into AHSS forming performance and help address potential issues. Numerical and experimental data modeling will contribute to optimizing manufacturing processes.

 Recent advancements in the automotive industry have emphasized the importance of fuel efficiency, weight reduction, and durability. In response, AHSS materials have become widely used, particularly in cold forming. However, their high strength reduces formability, leading to challenges such as edge cracking. In this study, 600DU steel from two different mills was tested. Tensile tests were conducted on EU1 and EU2 at 0, 45, and 90 to the rolling direction per JIS Z 2241 No. 5. The tensile strength values were similar, but EU2 showed higher elongation. A hole expansion test revealed an average expansion of 27 for EU1 and 60 for EU2. Vickers hardness was measured under an HV 10 load. Metallographic preparation was followed by microstructural analysis using optical and SEM microscopy. In the AutoForm simulation analysis, the average thickness reduction of the EU1 steel was determined to be 19, while that of the EU2 steel was measured at 11. These results indicate that the EU1 steel exhibits 8 greater thinning compared to the EU2 steel. This study examines the formability of 600DU dual-phase AHSS steel from different manufacturers using numerical and experimental methods. The findings provide key insights into AHSS forming performance and help address potential issues. Numerical and experimental data modeling will contribute to optimizing manufacturing processes.

 Recent advancements in the automotive industry have emphasized the importance of fuel efficiency, weight reduction, and durability. In response, AHSS materials have become widely used, particularly in cold forming. However, their high strength reduces formability, leading to challenges such as edge cracking. In this study, 600DU steel from two different mills was tested. Tensile tests were conducted on EU1 and EU2 at 0, 45, and 90 to the rolling direction per JIS Z 2241 No. 5. The tensile strength values were similar, but EU2 showed higher elongation. A hole expansion test revealed an average expansion of 27 for EU1 and 60 for EU2. Vickers hardness was measured under an HV 10 load. Metallographic preparation was followed by microstructural analysis using optical and SEM microscopy. In the AutoForm simulation analysis, the average thickness reduction of the EU1 steel was determined to be 19, while that of the EU2 steel was measured at 11. These results indicate that the EU1 steel exhibits 8 greater thinning compared to the EU2 steel. This study examines the formability of 600DU dual-phase AHSS steel from different manufacturers using numerical and experimental methods. The findings provide key insights into AHSS forming performance and help address potential issues. Numerical and experimental data modeling will contribute to optimizing manufacturing processes.

 Recent advancements in the automotive industry have emphasized the importance of fuel efficiency, weight reduction, and durability. In response, AHSS materials have become widely used, particularly in cold forming. However, their high strength reduces formability, leading to challenges such as edge cracking. In this study, 600DU steel from two different mills was tested. Tensile tests were conducted on EU1 and EU2 at 0, 45, and 90 to the rolling direction per JIS Z 2241 No. 5. The tensile strength values were similar, but EU2 showed higher elongation. A hole expansion test revealed an average expansion of 27 for EU1 and 60 for EU2. Vickers hardness was measured under an HV 10 load. Metallographic preparation was followed by microstructural analysis using optical and SEM microscopy. In the AutoForm simulation analysis, the average thickness reduction of the EU1 steel was determined to be 19, while that of the EU2 steel was measured at 11. These results indicate that the EU1 steel exhibits 8 greater thinning compared to the EU2 steel. This study examines the formability of 600DU dual-phase AHSS steel from different manufacturers using numerical and experimental methods. The findings provide key insights into AHSS forming performance and help address potential issues. Numerical and experimental data modeling will contribute to optimizing manufacturing processes.

Article Details

Comparative Investigation of Edge Cracking Behavior in 600 MPa Dual Phase (DU) Steel Sheets from Different Manufacturers

Authors:

Zeki Ahmet Ekmen | Yiğit Gönülalan | Onur Muratal | Diğdem Atabek

Publisher:

Manisa Celal Bayar University

Main Topics:

Malzeme Karekterizasyonu

Journal:

Celal Bayar Üniversitesi Fen Bilimleri Dergisi Vol.21 Issue 3, pp.10-20

Document Type:

Article

Publication Date:

9/2025

Document Language:

English

Document ID (Org No.):

2001359117

pISSN:

1305-130X

Advanced High-Strength

Steel (AHSS)

Dual-Phase Steel

Cold Forming

Formability

Numerical and Experimental Methods.Gelişmiş Yüksek Dayanımlı Çelik (AHSS)

Çift Fazlı Çelik Soğuk Şekillendirme

Şekil Verme Yetenekliliği

Numerik ve Deneysel Yöntemler

Issues

Article Details

Authors: Zeki Ahmet Ekmen | Yiğit Gönülalan | Onur Muratal | Diğdem Atabek

Publisher: Manisa Celal Bayar University

Main Topics: Malzeme Karekterizasyonu

Journal: Celal Bayar Üniversitesi Fen Bilimleri Dergisi Vol.21 Issue 3, pp.10-20

Document Type: Article

Publication Date: 9/2025

Document Language: English

Document ID (Org No.): 2001359117

pISSN: 1305-130X

Issues

Authors:

Zeki Ahmet Ekmen | Yiğit Gönülalan | Onur Muratal | Diğdem Atabek

Publisher:

Manisa Celal Bayar University

Main Topics:

Malzeme Karekterizasyonu

Journal:

Celal Bayar Üniversitesi Fen Bilimleri Dergisi Vol.21 Issue 3, pp.10-20

Document Type:

Article

Publication Date:

9/2025

Document Language:

English

Document ID (Org No.):

2001359117

pISSN:

1305-130X