Title of article :
Effect of Casting Diameter and Heat Treatment Process on Microstructural Evolution and Mechanical Properties of Fe55-XCr18Mo7B16C4NbX- (X=0,3) Ribbons and Nanostructured Rods
Author/Authors :
Tavakoli Harandi, M Tarbiat Modares University - Department of Materials Engineering - Tehran, Iran , Askari-Paykani, M Tarbiat Modares University - Department of Materials Engineering - Tehran, Iran , Shahverdi, H Tarbiat Modares University - Department of Materials Engineering - Tehran, Iran , Nili Ahmadabadi, M Center of Excellence for High Performance Materials - School of Metallurgy and Materials Engineering - College of Engineering - University of Tehran - Tehran, Iran
Abstract :
One-step and two-step annealing techniques were used to examine the relationship between microstructure
and mechanical properties during compression tests in iron-based ribbons and nanostructured 1- and 2.5mm cylindrical
rods. The X-ray diffraction, microstructural, and mechanical results showed that substituting Nb for Fe had a minor
effect on glass-forming ability but it increased the formability index. The novel two-step annealing process resulted in a
remarkable formability index of 16.62 GPa, yield stress of 2830 MPa, ultimate strength of 3866 MPa, and 4.3% plastic
strain. A ductile nanosized -Fe framework and boron-containing nano precipitations, which caused Zener pinning
effect, were responsible for these novel mechanical properties.
Keywords :
Mechanical properties , Microstructure , Heat treatment , Rapid solidiflcation , Casting
Journal title :
Astroparticle Physics
