Low-medium strength steels are used by increasing their thickness in parts where high strength is required on ships due to the low weldability and formability of high-strength steels. The use of thicker plates brings about a significant increase in the ship’s weight and their fuel consumption as expected. So, it is very important to improve the strength of low-medium strength shipbuilding steels by applying severe plastic deformation methods or heat treatments. Grain refinement via severe plastic deformation (SPD) seems to be an essential strengthening mechanism without changing the chemical composition of metallic materials. Among SPD methods, equal channel angular pressing (ECAP) is one of the most commonly used one due to its high grain refinement capacity. When the literature is examined, it is clearly seen that ECAP is not applied to any shipbuilding steel before. Therefore, in this study, one pass ECAP at 300 0C to low-medium strength shipbuilding steel (Grade A) which has intensively used in the shipbuilding industry and the changes in the microstructural and mechanical properties of steel after ECAP were investigated. After investigations, it was determined that the average grain size after ECAP decreased from 25 μm (base material) to 7 μm and as a result of this, hardness and strength values increased significantly compared to the base material. On the other hand, wear and formability tests were applied after and before ECAP and it was determined that while a slight improvement was obtained in wear behavior, formability behavior deteriorated after ECAP.
|Konular||Mühendislik, Malzeme Bilimleri, Tekstil|
|Yayımlanma Tarihi||2020 Mart 8(1)|
|Bölüm||Araştırma Makalesi \ Research Makaleler|
|Teşekkür||Çalışma kapsamında laboratuvar imkânlarının kullanılması noktasındaki katkılarından ötürü Karadeniz Teknik Üniversitesi Makine Mühendisliği Bölümü Öğretim Üyesi Prof. Dr. Gençağa PÜRÇEK’e teşekkürü bir borç bilirim.|
: 27 Mayıs 2019
|APA||SEKBAN, D . (2020). EŞ KANALLI AÇISAL PRESLEME (EKAP) UYGULANAN GEMİ İNŞA ÇELİĞİNİN İÇYAPI VE MEKANİK ÖZELLİKLERİNİN İNCELENMESİ. Mühendislik Bilimleri ve Tasarım Dergisi , 8 (1) , 240-251 . DOI: 10.21923/jesd.570536|