INVESTIGATION OF THE FLOW BEHAVIOUR OF MARTENSITIC STEELAT ELEVATED TEMPERATURES VIA UNIAxIAL TENSILE TESTS
Küçük Resim Yok
Tarih
2025
Yazarlar
Dergi Başlığı
Dergi ISSN
Cilt Başlığı
Yayıncı
Polska Akad Nauk, Polish Acad Sciences, Inst Metall & Mater Sci Pas
Erişim Hakkı
info:eu-repo/semantics/openAccess
Özet
In recent years, advanced high strength steels have been the main choice of automobile manufacturers due to their excellent strengths and decent formability. In this study, the forming behaviour of a martensitic steel (MART 1200) at elevated temperatures, where higher formability and an acceptable strength can be achieved, has been investigated. For this purpose, tensile test experiments have been conducted at room temperature, 175 degrees C, 275 degrees C, 375 degrees C and 475 degrees C in two different strain rates (0.005 s-1, 0.05 s-1). The flow behaviour, elongation capacity, strain rate sensitivity, strain hardening and strain hardening rate of MART1200 have been investigated and fracture surfaces and microstructures have been examined by scanning electron microscope. It has been shown that the strain rate sensitivity of MART1200 increases significantly after 275 degrees C and, for the higher strain rate, a significant improvement up to 80% in the elongation capacity has been achieved in return for a 19% strength reduction at 375 degrees C.
Açıklama
Anahtar Kelimeler
Advanced high strength steel, martensitic steel, warm forming, flow behaviour, tensile test
Kaynak
Archives of Metallurgyand Materials
WoS Q Değeri
Q4
Scopus Q Değeri
Q3
Cilt
70
Sayı
2
