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Title: Effects of microstructure and notches on the mechanical properties of dual-phase steels
Authors: Uludağ Üniversitesi/Mühendislik ve Mimarlık Fakültesi.
Bayram, Ali
Uğuz, Agah
Ula, Murat
Keywords: Transformed 0.15-pct-c steels
1.2-pct si-1.5-pct mn
Tensile properties
Materials science
Metallurgy & metallurgical engineering
Issue Date: 1999
Publisher: Elsevier Science
Citation: Bayram, A. vd. (1999). "Effects of microstructure and notches on the mechanical properties of dual-phase steels". Materials Characterization, 43(4), 259-269.
Abstract: A low-carbon (0.1%) steel has been subjected to three different heat treatments to obtain dual-phase steels with different microstructures. The steel with the intercritically annealed microstructure of equiaxed ferrite-martensite exhibited the highest tensile strength, the lowest ductility, and intermediate fracture toughness properties. Step quenching also produced an equiaxed ferrite-martensite structure, but the material had the worst mechanical properties of the three different heat-treatment conditions. In contrast to the other two heat-treatment conditions, step annealing produced a fibrous (fine, needle-like) ferrite-plus-martensite structure. This gave rise to a material of intermediate tensile strength but with the highest ductility, notch strength, and fracture toughness. It is argued that optimum mechanical properties in a dual-phase steel can best be achieved by obtaining a microstructure containing fine, fibrous needle-like, martensite. (C) Elsevier Science Inc., 1999. All rights reserved.
ISSN: 1044-5803
Appears in Collections:Web of Science

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