Study of the effect of nano-sized precipitates on the mechanical properties of boron-added low-carbon steels by neutron scattering techniques

Small-angle neutron scattering (SANS) and neutron powder diffraction (ND) techniques were used to study quantitatively the effect of nano-sized precipitates and boron addition on the mechanical properties of low-carbon steels. SANS was used to evaluate nano-sized precipitates, smaller than about 600 Å in diameter, and ND was used to determine the weight fraction of the cementite precipitates. Fine core–shell structured spherical precipitates with an average radius of ~50 Å, such as MnS and/or CuS, surrounded by BN layers were observed in the boron-added (BA) low-carbon steels; fine spherical precipitates with an average radius of ~48 Å were mainly observed in the boron-free (BF) low-carbon steels. In the BA steels, the number of boron precipitates, such as BN, Fe3(C,B) and MnS, surrounded by BN layers increased drastically at higher hot-rolling temperatures. The volume fraction of the fine precipitates of the BA steels was higher than that of the BF steels; this difference is related to the rapid growth of the BN layers on the MnS and CuS precipitates. Boron addition to low-carbon steels resulted in a reduction in strength and an improvement in elongation; this behaviour is related to the reduction of the solute carbon and the nitrogen contents in the ferrite matrix caused by the precipitation of BN, as well by the increase in the volume fraction of the cementites.

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The Influence of Oxide Inclusion on the Refinement of Bainite and Toughness in HAZ for Low Carbon Steels

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.651.163 ◽

2013 ◽

Vol 651 ◽

pp. 163-167

Author(s):

Shu Rui Li ◽

Xue Min Wang ◽

Xin Lai He

Keyword(s):

Mechanical Properties ◽

Acicular Ferrite ◽

Oxide Inclusion ◽

Optical Microscope ◽

Carbon Steels ◽

Low Carbon ◽

Low Carbon Steels ◽

The Core ◽

Ti Oxides ◽

Bainitic Steels

The influence of Ti oxide on the toughness of heat affected zone for low carbon bainitic steels has been investigated. The optical microscope, SEM and TEM were used to analyze the composition, size and distribution of the inclusions, and the microstructure and mechanical properties after welding thermal simulation were also investigated. The effect of Ti oxide inclusion on the transformation of acicular ferrite has also been studied. The results show that after the melting with Ti dioxide technique the inclusion is complex, in the core is Ti oxides about 1-3 micron and around it is MnS. It has been found the acicular ferrite can nucleate at the inclusions and the Ti oxide inclusion will promote the nucleation of acicular ferrite, and the acicular ferrite will block the growth of bainite. Therefore by introducing the Ti oxide in the steels the microstructure of HAZ could be refined markedly therefore the toughness of HAZ can be improved evidently.

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Effect of deformation rate on low carbon steels mechanical properties

IOP Conference Series Materials Science and Engineering ◽

10.1088/1757-899x/461/1/012030 ◽

2018 ◽

Vol 461 ◽

pp. 012030

Author(s):

I Jandrlić ◽

S Rešković ◽

T Brlić ◽

V Furlan

Keyword(s):

Mechanical Properties ◽

Deformation Rate ◽

Carbon Steels ◽

Low Carbon ◽

Low Carbon Steels

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Integrated crystal plasticity and phase field model for prediction of recrystallization texture and anisotropic mechanical properties of cold-rolled ultra-low carbon steels

International Journal of Plasticity ◽

10.1016/j.ijplas.2019.102644 ◽

2020 ◽

Vol 127 ◽

pp. 102644 ◽

Cited By ~ 5

Author(s):

K.M. Min ◽

W. Jeong ◽

S.H. Hong ◽

C.A. Lee ◽

P.-R. Cha ◽

...

Keyword(s):

Mechanical Properties ◽

Phase Field ◽

Recrystallization Texture ◽

Field Model ◽

Phase Field Model ◽

Carbon Steels ◽

Low Carbon ◽

Low Carbon Steels ◽

Anisotropic Mechanical Properties ◽

Cold Rolled

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Mechanical Properties of Nb-containing Low-carbon Steels Produced by Direct Rolling

Tetsu-to-Hagane ◽

10.2355/tetsutohagane1955.74.12_2323 ◽

1988 ◽

Vol 74 (12) ◽

pp. 2323-2329 ◽

Cited By ~ 1

Author(s):

Masahiko ODA ◽

Hiroshi KUBO ◽

Osamu AKISUE ◽

Kichi NAKAZAWA

Keyword(s):

Mechanical Properties ◽

Carbon Steels ◽

Low Carbon ◽

Low Carbon Steels ◽

Direct Rolling

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Study of precipitate and texture in low-carbon steels by neutron scattering techniques

Physica B Condensed Matter ◽

10.1016/j.physb.2004.03.124 ◽

2004 ◽

Vol 350 (1-3) ◽

pp. E475-E478 ◽

Cited By ~ 5

Author(s):

E.J Shin ◽

B.S Seong ◽

Y.S Han ◽

C.H Lee ◽

H.R Kim

Keyword(s):

Neutron Scattering ◽

Carbon Steels ◽

Low Carbon ◽

Low Carbon Steels

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Deformation, Mechanical Properties, and Fracture of Quenched and Tempered Carbon Steels

10.31399/asm.tb.spsp2.t54410405 ◽

2015 ◽

pp. 405-437

Keyword(s):

Mechanical Properties ◽

Mechanical Behavior ◽

Ductile Fracture ◽

Carbon Steels ◽

Low Carbon ◽

Tempering Temperature ◽

Medium Carbon ◽

Low Carbon Steels ◽

Deformation Properties ◽

Medium Carbon Steels

Abstract Steels with martensitic and tempered martensitic microstructures, though sometimes perceived as brittle, exhibit plasticity and ductile fracture behavior under certain conditions. This chapter describes the alloying and tempering conditions that produce a ductile form of martensite in low-carbon steels. It also discusses the effect of tempering temperature on the mechanical behavior and deformation properties of medium-carbon steels.

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