Investigation of the Interfacial Characteristics and Mechanical Properties of Duplex Stainless Steel/Low-Alloy Steel Clad Rebar

In this work, duplex stainless steel/low-alloy steel-clad rebars were fabricated using metal deposition and hot rolling. The interfacial characteristics of the rebar, such as element diffusion and phase composition, were investigated using an optical microscope and a scanning electron microscope wit...

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Bibliographic Details
Published in:Metals (Basel ) 2022-10, Vol.12 (10), p.1573
Main Authors: Ma, Jian, Liu, Xuming, Chen, Jilin, Liu, Xin, Zhang, Hongliang, Wang, Baoshan, Feng, Guanghong
Format: Article
Language:English
Subjects:
Alloys
Boron steel
Building materials
Carburizing
clad rebar
Cladding
Corrosion resistance
Duplex stainless steels
Elongation
Finite element method
Grooves
Heat resistance
Hot rolling
Interfacial bonding
interfacial characteristics
Investigations
Low alloy steels
Martensite
Mechanical properties
Metals
Microstructure
Morphology
Optical microscopes
Phase composition
Rebar
Reinforcing steels
Shape effects
Specialty steels
Stainless steel
Steel alloys
Temperature
Tensile strength
Thickness
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Summary:In this work, duplex stainless steel/low-alloy steel-clad rebars were fabricated using metal deposition and hot rolling. The interfacial characteristics of the rebar, such as element diffusion and phase composition, were investigated using an optical microscope and a scanning electron microscope with an energy-dispersive spectrometer. The mechanical properties of the rebar were evaluated by tensile and bending tests. The results show that the rebar interface is composed of a carburized layer on the duplex stainless steel side and a decarburized layer on the low-alloy steel side; they also show that the rebar exhibits good mechanical properties, with 435 MPa of yield strength, 630 MPa of tensile strength, and a 24.8% percentage elongation. The reduction in the cladding thickness at the rebar’s transverse rib root was studied using the ABAQUS software. The results show that the cladding thickness is reduced due to the effect of the groove shape during the rolling process. The rebar’s transverse rib root cracked after bending due to the thinning of the cladding and brittle fractures in the interfacial martensite layer.
ISSN:2075-4701
2075-4701
DOI:10.3390/met12101573