Influence of nanosize particles and methods of mixing on mechanical abilities of SP-70 powder steel

Панов, В. С.; Eremeeva, J. V.; Scoricov, R. A.; Miheev, Gregory; Sharipzyanova, G. Kh.; Ter-Vaganyants, U. S.

doi:10.1134/s2075113316020155

Cited by 3 publications

(2 citation statements)

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“…The relative elongation, corresponding to the yield strength σy, is approximately found by the formula εy = σy/E. The experimental tensile diagram can also be used to approximate numerically the relative elongation εu (corresponding to the ultimate strength σu and the maximum of diagram) and the hardening modulus Py at the yield point [1,4,[16][17][18][19][20][21][22]. When receiving at a pipe plant the technical documentation from a metal sheet manufacturer, the latter does not provide a tensile stress-strain diagram of metal, but only indicates parameters σy, σu, δ and ψ [7, 23−28].…”

Section: Fig 1 the Tensile Diagrammentioning

confidence: 99%

On Question of Metals’ Plasticity

Shinkin

2021

DDF

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Straightforward and reverse descriptions are used to describe the metal’s plasticity zone. For the straightforward descriptions of the hardening zone, the “reference” point is the relative deformation εy corresponding to the yield strength σy. The deviation of the relative deformations in the metal hardening zone is measured relative to εy, and the deviation of the normal stresses is measured relative to σy. For the reverse descriptions of the metal hardening zone, the “reference” point is the relative deformation εu corresponding to the ultimate strength σu. The deviation of the relative deformations in the metal hardening zone is measured relative to εu, and the deviation of the normal stresses is measured relative to σu.

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Section: Fig 1 the Tensile Diagrammentioning

confidence: 99%

On Question of Metals’ Plasticity

Shinkin

2021

DDF

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“…However, the work is actively carried out and the productivity of the methods is increasing every year. According to the results of works [20][21][22], the addition of NP to the initial charge before sintering significantly increases the mechanical properties of the powder steels.…”

Section: Introductionmentioning

confidence: 99%

Enhancing Mechanical Properties of Various Sintered Pellets with Nano-Additives

Nguyên

Konyukhov

Nguyen³

2021

DDF

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The impact of Fe, Co, Ni nano-additives on the density, microhardness and bending strength was investigated for several sintered pellets. Fe, Co, Ni nanopowders (NP) were prepared in the size range 67-94 nm using chemical metallurgy techniques. These powders (0.5 wt. %) were dispersed into three sets of micron powders: Co (+0.5 wt. % Co NP); Fe (+0.5 wt. % Fe NP); Fe+0.5wt. % C (+0.5 wt. % Co and 0.5 wt. % Ni NP). Mixtures were further mixed and processed using a magnetic mill and a turbulent mixer. Sintering was carried out using spark plasma sintering (SPS) as well as pressureless sintering (PS). The densities of sintered pellets were found to increase by 2.5-3% (SPS) and 3-5% (PS) in the presence of nano-additives; corresponding increases in microhardness and bending strength were determined to be 7.9-11.1% and 17.9-38.7%, respectively. These results are discussed in terms enhanced packing due to interparticle sliding and the filling of free spaces with the nanodisperse phase.

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