Bestimmung des Grenzumformgrades mit dem Torsionsversuch

Kliber, Jiří; Schindler, Ivo; Kubiński, W.; Kuźmiński, Z.

doi:10.1002/srin.198901693

Cited by 5 publications

(4 citation statements)

References 3 publications

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“…This procedure yielded in the value of Q = 340 kJ mol −1 for CuCr0.6 alloy, which allowed to calculate the values of Zener-Hollomon parameter Z(ė, T ) (s −1 ). Subsequently, both coordinates of the peak point could be mathematically described, depending on the so-called temperature-compensated strain rate Z [26][27][28]:…”

Section: The Hot Deformation Activation Energymentioning

confidence: 99%

High-temperature deformation properties of CuCr0.6 alloy

Rusz¹,

Schindler²,

Navrátil³

et al. 2020

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The submitted paper aimed to investigate the hot deformation behavior of CuCr0.6 alloy. Nil strength temperature of 1349 K and nil ductility temperature of 1313 K have been experimentally determined. Formability is monotonously increased with the decrease of forming temperature in the temperature range from 923 K to approx. 1273 K. The flow stress curves were obtained in the forming temperature interval of 923-1223 K and at a strain rate of 0.1-10 s −1. After their analysis, the hot deformation activation energy of 340 kJ mol −1 was calculated for peak stress and 393 kJ mol −1 for steady state. This proves that the value of the activation energy depends upon a strain size.

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Section: The Hot Deformation Activation Energymentioning

confidence: 99%

High-temperature deformation properties of CuCr0.6 alloy

Rusz¹,

Schindler²,

Navrátil³

et al. 2020

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“…This procedure has been quantified as Q = 380 kJ•mol -1 for CuFe2 alloy, which allowed for calculation of Zener-Hollomon parameter Z(ė,T ) [s -1 ] for given alloy. Subsequently, both coordinates of the stress peaks could be mathematically described, depending on the one defined temperature-compensated strain rate Z [23][24][25]…”

Section: Hot Deformation Activation Energymentioning

confidence: 99%

Archives of Metallurgy and Materials

Schindler¹,

Sauer²,

Kawulok³

et al. 2019

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STUDY OF HOT DEFORMATION BEHAVIOR OF CuFe2 ALLOYNil strength temperature of 1062°C and nil ductility temperature of 1040°C were experimentally set for CuFe2 alloy. The highest formability at approx. 1020°C is unusable due to massive grain coarsening. The local minimum of ductility around the temperature 910°C is probably due to minor formation of γ-iron. In the forming temperatures interval 650-950°C and strain rate 0.1-10 s -1 the flow stress curves were obtained and after their analysis hot deformation activation energy of 380 kJ• mol -1 was achieved. Peak stress and corresponding peak strain values were mathematically described with good accuracy by equations depending on Zener-Hollomon parameter.

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“…Deformation (strain) ε p which corresponds with maximum flow stress in function of parameter Z was marked from exponential function [9]:…”

Section: Deformability Testsmentioning

confidence: 99%

Microstructure and Plastic Properties of Mg-Li Alloys Smelted in Vacuum Induction Furnaces after Hot Working

Hadasik¹,

Kuc²,

Mikuszewski³

et al. 2017

Archives of Metallurgy and Materials

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The paper analyses the characteristics of plasticity and microstructure of magnesium alloys with lithium meant for hot plastic working with different lithium content. The alloys were prepared in conditions of vacuum smelting. Achieved ingots were subject to hot extrusion. Tests on Gleeble simulator were conducted to assess the susceptibility of tested alloys to plastic forming in conditions of hot plastic working. For tested alloy the activation energy was marked for hot plastic deformation and plasticity characteristics in function of Zener-Hollomon parameter. After the analysis of the influence of temperature on the deformability of tested alloys it was stated that the alloy containing 8%Li (LAZ831) has better susceptibility to plastic treatment than alloy containing 4%Li (LAZ431), but higher than in case of classic magnesium alloys -AZ31.

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Bestimmung des Grenzumformgrades mit dem Torsionsversuch

Cited by 5 publications

References 3 publications

High-temperature deformation properties of CuCr0.6 alloy

High-temperature deformation properties of CuCr0.6 alloy

Archives of Metallurgy and Materials

Microstructure and Plastic Properties of Mg-Li Alloys Smelted in Vacuum Induction Furnaces after Hot Working

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