Journals / Politeknik Dergisi / 2002 / Cilt: 4 - Sayı: 0

Investigation of anisotropy at the mechanical properties of hot rolled 8620 steel bar

Sıcak hadde mamulü SAE 8620 çelik çubuğun mekanik özelliklerindeki anizotropik durumun incelenmesi

Pages
35–39
DOI
—
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AI Summary & Key Takeaways

AI Insight
⚡ TL;DR(Too Long; Didn't Read)

But, yield stress and tensile stress of steel bar were found to be isotropic.

📌 3 Key Takeaways

🎯
Objective & Hypothesis:The anisotropic behaviour of the mechanical properties of hot rolled round product produced in electric arc furnace was investigated.
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Key Findings & Data:Tensile and izod impact tests were conducted on the specimens had been cut out in $\phi=0^\circ$, $\phi=45^\circ$° and $\phi=90^\circ$, to the rolling direction.
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Conclusion & Impact:But, yield stress and tensile stress of steel bar were found to be isotropic.
🔬Design:Research Article
📍Scope:Comprehensive Sample
⚙️Variables:Domain Parameters

Abstract

The anisotropic behaviour of the mechanical properties of hot rolled round product produced in electric arc furnace was investigated. Tensile and izod impact tests were conducted on the specimens had been cut out in $\phi=0^\circ$, $\phi=45^\circ$° and $\phi=90^\circ$, to the rolling direction. Ductility, tensile stress, yield stress and impact values of these specimens in various directions were examined. Morphologies of fracture surfaces and types of inclusions were investigated by scanning electron microscopy and EDAX analyses respectively. The decrasing on ductility and impact value at the transverse direction were due to the sulphide inclusions which are aligned in the rolling direction of the steel bar were determined. But, yield stress and tensile stress of steel bar were found to be isotropic.

Özet

Elektrik ark ocağında üretilmiş ve sıcak haddelenmiş SAE 8620 yuvarlak çelik çubuğun mekanik özelliklerindeki anizotropik durum incelenmiştir. Haddeleme doğrultusuna $\phi=0^\circ$, $\phi=45^\circ$° ve $\phi=90^\circ$, açı ile hazırlanan çekme ve çentik darbe numunelerine çekme ve izod darbe deneyleri yapılmıştır. Farklı doğrultulardaki bu numunelerin süneklikleri, çekme, akma ve darbe dayanımları belirlenmiştir. Tarama elektron mikroskop çalışmaları ve EDAX analizleri ile kırık yüzey morfolojileri incelenmiş ve inklüzyon türleri belirlenmiştir. Haddeleme doğrultusunda uzamış MnS inklüzyonları sebebi ile çelik çubuğun bu doğrultuya dik doğrultudaki süneklik ve darbe dayanımında aşırı düşüş belirlenmiştir. Ancak, akma ve çekme dayanımında yöne bağlı belirgin bir değişiklik olmamıştır.

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Cite This Article

ÖZÇATALBAŞ, Y. (2002). Investigation of anisotropy at the mechanical properties of hot rolled 8620 steel bar. Politeknik Dergisi, Cilt: 4 - Sayı: 0, 35–39. https://ajindex.com/articles/306932

References (1)

  1. MKE Normu Özel Nitelikte Çelik Türleri Katoloğu, MKE Basımevi,1978 2. Çelik Türleri Kataloğu, T.E.F. Matbaası, 1980, Ankara 3. Beer, F.P., Johnston, E.R., Mechanics of Materials, McGraw-Hill, 1983 4. Sun, J., Boyd, J.D., “Effect of thermomechanical processing on anisotropy of cleavage fracture stress in microalloyed linepipe steel”, Int. Journal of Pressure Vessels and Piping, 77, 369-377, (2000) 5. Sukapuntavorn, A., Somsiri, C., “A comparative study of limiting strain in low carbon steel”, Journal of Materials Processing Technology, 63, 140-143, (1997) 6. Mendoza, R., Huante, J., ve diğerleri, “Processing of ultra low carbon steels with mechanical properties adequate for automotive applications in the as-annealed condition”, Materials Science and Engineering, A276, 203-209, (2000) 7. Tau, L., Chan, S.L.I., “Effects of ferrite/ pearlite alignment on the hydrogen permeation in a AISI 4130 steel”, Materials Letters, 29, 143-147, (1996) 8. Osakada, K., Kido, H., “The anisotropy of ductility in carbon steel”, Bulletin of JSME, Vol.26, No.222, 2067-2072, (1983) 9. Kayalı, E.S., Ensari, C., Metallere Plastik Şekil Verme İlke ve Uygulamaları”, İTÜ, 1985 10. Dieter, E.G., Mechanical Metallurgy, McGraw-Hill, UK, 1988 11. Samuels, L.E., Optical Microscopy of Carbon Steel, American Society for Metals, USA,1989