Physical and Numerical Determination of Workability in Aluminium Alloys

Kováčová, Andrea; Kvačkaj, Tibor; Kočiško, Róbert; Tiža, Juraj

doi:10.12776/ams.v20i3.359

Cited by 13 publications

(16 citation statements)

References 23 publications

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“…In terms of nanosize methods, in present time in PM area, are very promising methods are SPD (Severe Plastic Deformation) methods, such as ECAP, ECAP-BP or ECAR [26][27][28][29][30]. Another and proven method for downsizing the final grain size in cemented carbides is grain growth inhibition by adding small amounts of VC during liquid phase sintering.…”

Section: Resultsmentioning

confidence: 99%

Wear Characteristics of Sintered Cermets

Bidulský

Bidulská

Arenas³

et al. 2012

High Temperature Materials and Processes

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The present paper deals with the tribological behaviour of the boride and carbide hardmetals evaluated by performing comparative dry sliding pin-on-disc experiments using normal contact loads. Analyses of the wear performance results, microstructural evaluation and processing conditions effect indicate that microstructure inhomogenities play an important role in abrasive wear behaviour of cermets. In term of grain size and chemical composition, the addition of VC also play an important role in increasing the wear resistance.

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Section: Resultsmentioning

confidence: 99%

Wear Characteristics of Sintered Cermets

Bidulský

Bidulská

Arenas³

et al. 2012

High Temperature Materials and Processes

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“…Most of the simulation software use constitutive material models by Hollomon, Ludwik, Swift, Voce, Krupkowski-Swift [9,10] to define material stress-strain behaviour when deformed at static strain rates conditions. For middle and higher strain rates following constitutive material models are used [11,12]: -Hollomon:…”

Section: Fig 1 Deformable Car Body Components At Frontal Impactmentioning

confidence: 99%

Quasistatic Strain Rates’ Effect to the Properties of Advanced Steels for Automotive Industry

Evin

Tomáš

Výrostek

2016

Acta Metall Slovaca

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The paper presents the findings of the strain rate effect, described in constitutive material models by strain rate sensitivity index m, to the strength and deformation material properties. These were evaluated from stress-strain diagrams recorded at tensile test using PC controlled testing machine TiraTEST 2300 according to STN EN ISO 6892-1. The high strength low alloyed steel H220PD, dual phase steel DP 600 and Trip steel RAK 40/70 were investigated at strain rates   = 0.0021, 0.083 and 0.125 s -1 . The results indicate major influence of the strain rate to the strength properties while only minor influence have been found when evaluate the deformation properties. The results also shown single phase materials are more sensitive to the strain rate than dual phase materials.

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“…Workability depends on process parameters such as stress, strain, strain rate, friction, forming temperature, and strain hardening as well as on the typical PM features such as porosity. For the assessment of critical workability, values have been proposed various criteria such as Cockroft-Latham (CL), Brozzo, Oyane, Johnson–Cook [ 21 , 22 , 23 , 24 ], etc. Cockcroft and Latham fracture criterion, which is based on a critical value of the tensile strain energy per unit of volume, is often used for engineering applications [ 25 ].…”

Section: Introductionmentioning

confidence: 99%

Evaluation of Powder Metallurgy Workpiece Prepared by Equal Channel Angular Rolling

et al. 2023

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The aim of the article is to examine the workability of sintered powder material of aluminum alloy (Alumix 321) through severe plastic deformations under the conditions of the equal channel angular rolling (ECAR) process. Accordingly, the stress–strain analysis of the ECAR was carried out through a computer simulation using the finite element method (FEM) by Deform 3D software. Additionally, the formability of the ALUMIX 321 was investigated using the diametrical compression (DC) test, which was measured and analyzed by digital image correlation and finite element simulation. The relationship between failure mode and stress state in the ECAR process and the DC test was quantified using stress triaxiality and Lode angle parameter. It is concluded that the sintered powder material during the ECAR processing failure by a shearing fracture because in the fracture location the stress conditions were close to the pure shear (η and θ¯ ≈ 0). Moreover, the DC test revealed the potential role as the method of calibration of the fracture locus for stress conditions between the pure shear and the axial symmetry compression.

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Physical and Numerical Determination of Workability in Aluminium Alloys

Cited by 13 publications

References 23 publications

Wear Characteristics of Sintered Cermets

Wear Characteristics of Sintered Cermets

Quasistatic Strain Rates’ Effect to the Properties of Advanced Steels for Automotive Industry

Evaluation of Powder Metallurgy Workpiece Prepared by Equal Channel Angular Rolling

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