Observation of Anisotropy of Creep Fracture Using Small Punch Test for Al-Al4C3 System Produced by Equal Channel Angular Pressing

Besterci, Michal; Dobeš, F.; Ballóková, Beáta; Sülleiová, Katarína; Kvačkaj, Tibor

doi:10.1515/htmp.2011.030

Cited by 3 publications

(2 citation statements)

References 14 publications

(13 reference statements)

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“…The times to fracture in ECAPed material are shorter than in the hot-extruded material, though the relative difference is smaller than in the previous case of deflection rate: Assuming the same value of power F n in both materials, the time to facture is about 43 times shorter at 623 K and 14 times shorter at 723 K. The ratio at 723 K should be taken with caution since its force dependence has to be admitted. The anisotropy of the creep properties and fracture using small punch tests for the Al-Al 4 and deflection at fracture were different in specimen with different orientation with respect to the axis of ECAP deformation [30,31]. A fracture surface analysis of the tested small punch specimens was conducted.…”

Section: Mechanical Properties Of Nanostructural Systemmentioning

confidence: 99%

HIGH TEMPERATURE MECHANICAL PROPERTIES OF Al-Al4C3 COMPOSITE PRODUCED BY MECHANICAL ALLOYING

Besterci¹,

Dobeš²,

Kvačkaj³

et al. 2014

Acta Metall Slovaca

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A method of mechanical alloying process is described. It was proved that the transformation efficiency of carbon to Al 4 C 3 by heat treatment of aluminium with the porous furnace black and electrographite at temperatures 723-873 K and time periods 1-10 hours is higher than that of the hard cracked graphite. The size of Al 4 C 3 dispersed phase was measured on thin foil and it was constant and as small as 30 nm. Subgrain size measured in the range of 100 grains in thin foils depended on the carbon type.. It ranged from 0.3 to 0.7 μm. Mechanical properties were analyzed in a microstructural matrix (after extrusion) as well as in nano-matrix The temperature dependence of ductility, and reduction of area in the temperature range of 623-723 K and strain rate of 10-1 s-1 , indicated a considerable increase of properties. In a case when the volume fraction of Al 4 C 3 changes from lower to higher, the grain rotation mechanism dominates instead of the grain boundary sliding. Creep parameters for Al-Al 4 C 3 systems and commercial IN9021 and IN9052 systems were compared. The dependence of the minimum deflection rate on the applied force as well as the dependence of the time to fracture on the applied force for two temperature levels (623 and 723 K) by small punch testing is depicted. The anisotropy of the creep properties and fracture using small punch tests for the Al-Al 4 C 3 system produced by ECAP were analyzed.

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Section: Mechanical Properties Of Nanostructural Systemmentioning

confidence: 99%

HIGH TEMPERATURE MECHANICAL PROPERTIES OF Al-Al4C3 COMPOSITE PRODUCED BY MECHANICAL ALLOYING

Besterci¹,

Dobeš²,

Kvačkaj³

et al. 2014

Acta Metall Slovaca

Self Cite

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“…Small punch creep tests under constant force were performed at the temperature of 623 K. It was shown that the fracture results, i.e. time to fracture and deflection at fracture were different in specimen with different orientation with respect to the axis of ECAP deformation, [26]. A fracture surface analysis of the tested small punch specimens was conducted.…”

Section: Mechanical Properties Of Nanostructural Systemmentioning

confidence: 99%

Mechanical Properties of Al-Al<sub>4</sub>C<sub>3</sub> Composite Produced by Mechanical Alloying

Besterci¹,

Dobeš²,

Sülleiová³

et al. 2013

ujms

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The aim of this paper was to study the influence of different input materials and methods of treatment on the microstructure, mechanical properties and fracture of dispersion strengthened aluminium alloys in the Al-Al 4 C 3 system. It was proved that the transformation efficiency of carbon to Al 4 C 3 by heat treatment of aluminium with the porous furnace black and electrographite is higher than that of the hard cracked graphite. The size of Al 4 C 3 dispersed phase was measured by TEM on thin foil and it was constant and as small as 30 nm. Subgrain size measured in the range of 100 grains in thin foils depended on the carbon type, as well. It ranged from 0.3 to 0.7 µm. The temperature dependence of ductility, and reduction of area in the temperature range of 623 -723 K and strain rate of 10 -1 s -1 , indicated a considerable increase of properties. In a case when the volume fraction of Al 4 C 3 changes from lower to higher, the grain rotation mechanism dominates instead of the grain boundary sliding. The dependence of the minimum deflection rate on the applied force as well as the dependence of the time to fracture on the applied force for two temperature levels (623 and 723 K) by small punch testing is depicted. The anisotropy of the creep properties and fracture using small punch tests for the Al-Al 4 C 3 system produced by ECAP were analysed.

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Assessment of Material Properties by Means of the Small Punch Test

Abendroth

Soltysiak

2015

Recent Trends in Fracture and Damage Mechanics

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Observation of Anisotropy of Creep Fracture Using Small Punch Test for Al-Al4C3 System Produced by Equal Channel Angular Pressing

Cited by 3 publications

References 14 publications

HIGH TEMPERATURE MECHANICAL PROPERTIES OF Al-Al4C3 COMPOSITE PRODUCED BY MECHANICAL ALLOYING

HIGH TEMPERATURE MECHANICAL PROPERTIES OF Al-Al4C3 COMPOSITE PRODUCED BY MECHANICAL ALLOYING

Mechanical Properties of Al-Al<sub>4</sub>C<sub>3</sub> Composite Produced by Mechanical Alloying

Assessment of Material Properties by Means of the Small Punch Test

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