The Effect of Niobium on the Formation of Nanostructured Low Carbon Steel Using Martensite Treatment
Publish Year: 1391
نوع سند: مقاله ژورنالی
زبان: English
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شناسه ملی سند علمی:
JR_ISSIRAN-9-1_002
تاریخ نمایه سازی: 6 آبان 1402
Abstract:
The formation of nano/ultrafine grained ferrite in low carbon steels containing different amounts of niobium was investigated using thermomechanical treatment which consisted of annealing of ۸۵% cold rolled martensite with different parameters. The specimens were characterized by optical and scanning electron microscopy and Vickers hardness test. A lamellar dislocation cell structure was formed during cold rolling. An increase in hardness was found during annealing with the addition of the Nb element. The mean grain size of the specimens annealed at ۵۵۰ ºC for ۳۰۰ s was approximately similar (ranging from ۷۹ to ۸۷ nm) for both chemical compositions. Increasing annealing temperature to ۶۰۰ ºC or annealing time to ۲.۷ ks led to a severe grain growth in the steel without Nb,but no considerable changes in Nb containing steel were observed.
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Authors
M. Abbasi
Department of Materials Engineering, Isfahan University of Technology, Isfahan ۸۴۱۵۶-۸۳۱۱۱, Iran
A. Kermanpur
Department of Materials Engineering, Isfahan University of Technology, Isfahan ۸۴۱۵۶-۸۳۱۱۱, Iran
A. Najafizadeh
Department of Materials Engineering, Isfahan University of Technology, Isfahan ۸۴۱۵۶-۸۳۱۱۱, Iran
Y. Mazaheri
Department of Materials Engineering, Isfahan University of Technology, Isfahan ۸۴۱۵۶-۸۳۱۱۱, Iran
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