Effect of Friction Stir Process on Mechanical Properties and Bottom Section Ultimate Strength of Ship Steel

SEKBAN D. M.

Journal of Materials Engineering and Performance, 2024 (SCI-Expanded) identifier

  • Yayın Türü: Makale / Tam Makale
  • Basım Tarihi: 2024
  • Doi Numarası: 10.1007/s11665-024-09791-y
  • Dergi Adı: Journal of Materials Engineering and Performance
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus, PASCAL, Aerospace Database, Applied Science & Technology Source, Aquatic Science & Fisheries Abstracts (ASFA), Chemical Abstracts Core, Communication Abstracts, Compendex, Computer & Applied Sciences, INSPEC, Metadex, Civil Engineering Abstracts
  • Anahtar Kelimeler: bottom-section ultimate strength, friction stir processing, mechanical properties, shipbuilding steel
  • Karadeniz Teknik Üniversitesi Adresli: Evet

Özet

Due to the supply problems and welding problems experienced in high-strength steels and the fact that the use of thicker sheets increases the weight of the ship, using low-strength steels by increasing their strength with severe plastic deformation methods (SPD) without changing their chemical content is seen as a good alternative. Among the SPD methods, friction stir process (FSP) stands out in terms of its applicability to plate type materials. On the other hand, it seems that there is no study in the literature on applying this process to shipbuilding steels and calculating the ultimate strength of the ship section by transferring the material properties to a finite element-based model after the FSP. In this context, the aim of the study is to reveal the effect of FSP on mechanical properties and the effect of the change in mechanical properties on the ultimate strength of a produced ship section. So, in the study, FSP was applied to ship steel and the changes in the microstructure and mechanical properties of the steel were determined. As a result of the examinations, it was determined that grain refining occurred in the steel after FSP and as a result, the hardness, strength and formability forces of the steel increased. In addition, the changes in the mechanical properties of the steel were transferred to the ship bottom section created with a finite element-based program, and the ultimate strength values in this section were examined comparatively for the base material and the FSPed material. With examinations, it was determined that the ship section’s ultimate strength values were higher in the model created with FSPed steel.