The Influence of Strain Rate on the Plasticity of Steel Sheets

Micheľ, J.; Buršák, M.

doi:10.26552/com.c.2010.4.27-32

Cited by 3 publications

(7 citation statements)

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“…An interesting, but unsatisfactory paper by Michel and Buršak 133 compared the mechanical and toughness properties of two controlled rolled microalloyed steels, A (0·09C–1·49Mn–0·024Al–0·031V–0·04Nb–0·022Zr) and B (0·088C–1·16Mn–0·024Al–0·035V–0·013Nb). The percentages of nitrogen and oxygen were not given, neither were any details of the controlled rolling schedule or the metallographic methods.…”

Section: Effect Of Zirconium On Mechanical Properties Of Steelsmentioning

confidence: 99%

“…The microstructure was characterised, producing for steel A an average grain size of 3·2 μm and an interparticle distance of 85 nm, and for Steel B an average grain size of 3·7 μm and an interparticle distance of 75 nm. Michel and Buršak 133 undertook a modified Hall–Petch analysis 30,96 using these data, estimating the contributions to the measured proof stresses as 540 MPa for steel A and 520 MPa for Steel B. The respective contributions through grain size were 265 and 246 MPa and for dispersion strengthening, via the interparticle distance data above, 110 and 140 MPa respectively.…”

Section: Effect Of Zirconium On Mechanical Properties Of Steelsmentioning

confidence: 99%

“…It is interesting to note that the yield stress data and dispersion, plus possibly dislocation, strengthening contributions here are similar to those given above for the steels investigated by Michel and Buršak. 133 More recent research undertaken by Wang et al 6 investigated two ∼0·07C steels with ∼0·034Al, one (S1: 0·017Zr, 0·0039N) giving a hypo-stoichiometric Zr/N ratio of 4·36, the other (S2: 0·040Zr, 0·0037N) a hyper-stoichiometric ratio of 10·8. Ingots of 50 kg were vacuum melted, homogenised at 1200°C for 2 h, then thermo-mechanically rolled to 20 mm thick plate, followed by two-pass water cooling to ∼520°C and finally air cooled to ambient temperature.…”

Section: Effect Of Zirconium On Mechanical Properties Of Steelsmentioning

confidence: 99%

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Role of zirconium in microalloyed steels: A review

Baker

2015

Materials Science and Technology

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Recently there has been a renewed interest in the addition of zirconium to microalloyed steels. It has been used since the early 1920's, but has never been universally employed, as have niobium, titanium or vanadium. The functions of zirconium in steelmaking are associated with a strong chemical affinity, in decreasing order, for oxygen, nitrogen, sulphur and carbon. Historically, the main use of additions of zirconium to steel was for combination preferentially with sulphur and so avoid the formation of manganese sulphide, known to have a deleterious influence of the impact toughness of wrought and welded steel. Modern steelmaking techniques have also raised the possibility that zirconium additions can reduce the austenite grain size and increase dispersion strengthening, due to precipitation of zirconium carbonitrides, or in high nitrogen vanadium-zirconium steels, vanadium nitride. This review gathers information on the compounds of zirconium identified in steels together with crystallographic data and solubility equations. Also brief accounts of the role of sulphides and particles in general on austenite grain size control and toughness are included.

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Section: Effect Of Zirconium On Mechanical Properties Of Steelsmentioning

confidence: 99%

Section: Effect Of Zirconium On Mechanical Properties Of Steelsmentioning

confidence: 99%

Section: Effect Of Zirconium On Mechanical Properties Of Steelsmentioning

confidence: 99%

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Role of zirconium in microalloyed steels: A review

Baker

2015

Materials Science and Technology

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Section: Introductionmentioning

confidence: 99%

“…The strain rate is an external factor which significantly influences the limit state of a material, its behaviour in the forming process, as well as on the resulting properties of the formed products [1][2][3][4]. The influence of the strain rate on the strength characteristics (yield point, tensile strength) are described using parametric equations [2][3][4][5]. However, the sensitiveness of a material on the strain rate is a function of the material structure, and it can generally be stated that the "more homogeneous" structure, the higher its sensitiveness to the strain rate [6][7][8][9].…”

Section: Introductionmentioning

confidence: 99%

Influence of the Strain Rate and Heat Treatment on the Mechanical Properties of Steel Sheets

Micheľ

Buršák

Lacková

2014

KEM

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The paper analyses the influence of the strain rate on the behaviour of unalloyed steels with Re 210 – 550 MPa in the deformation process. It presents and analyses the results of the influence of the strain rate ranging from 10-3 to 2.5.102 s-1 on the yield point, the tensile strength, the elongation and the reduction of area. It analyses the non-homogeneity of development of plastic deformation from both the macroscopic and microscopic points of view, as well as the influence of the strain rate on the development of plastic deformation. Since the intensity of the influence of the strain rate on the properties of materials depends on their internal structure, the tested steels are divided into three groups based on their yield point and yield point to tensile strength ratio.

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