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Statements

Subject Item
n2:RIV%2F61989100%3A27360%2F14%3A86091306%21RIV15-MSM-27360___
rdf:type
skos:Concept n20:Vysledek
rdfs:seeAlso
http://www.sciencedirect.com/science/article/pii/S0921509314008053
dcterms:description
The paper proposes a new variation for the application of SPD methods. Suggested TCMAP (twisted channel multi angular pressing) technology obtains the larger imposed strain more effectively while increasing homogeneity of material. The number of passes needed to obtain the ultra-fine to nano-scale grains in bulk materials can be significantly reduced. Commercially pure Al (99.97%) was used for the experimental verification of the suggested process. The deformation behaviour of the material during the process was also described using the numerical simulation based on FE analysis. It was proved that the geometric parameters of the die, as well as the used individual deformation sections sequence, can significantly affect the size and homogeneity of the imposed strain or stability of the plastic flow of material. Predicted value of imposed strain, after a single pass, reached approximately 2.8. It is obvious that during the TCMAP process no dead zones occurred in any of the channel deformation sections. Due to designed shape of channel are both ends of processed sample defined by higher imposed strain and only negligible shape changes. A comparison between the FEM and experimental results of the required loads and the homogeneity of the imposed strain distribution showed good agreement. The high homogeneity of the distribution of the deformation was confirmed by micro-hardness testing, whereas a relative growth of 97% was documented after the first pass. The grain size, determined after TCMAP pass, averaged out 2.4 micrometers. The paper proposes a new variation for the application of SPD methods. Suggested TCMAP (twisted channel multi angular pressing) technology obtains the larger imposed strain more effectively while increasing homogeneity of material. The number of passes needed to obtain the ultra-fine to nano-scale grains in bulk materials can be significantly reduced. Commercially pure Al (99.97%) was used for the experimental verification of the suggested process. The deformation behaviour of the material during the process was also described using the numerical simulation based on FE analysis. It was proved that the geometric parameters of the die, as well as the used individual deformation sections sequence, can significantly affect the size and homogeneity of the imposed strain or stability of the plastic flow of material. Predicted value of imposed strain, after a single pass, reached approximately 2.8. It is obvious that during the TCMAP process no dead zones occurred in any of the channel deformation sections. Due to designed shape of channel are both ends of processed sample defined by higher imposed strain and only negligible shape changes. A comparison between the FEM and experimental results of the required loads and the homogeneity of the imposed strain distribution showed good agreement. The high homogeneity of the distribution of the deformation was confirmed by micro-hardness testing, whereas a relative growth of 97% was documented after the first pass. The grain size, determined after TCMAP pass, averaged out 2.4 micrometers.
dcterms:title
Twist channel multi-angular pressing (TCMAP) as a new SPD process: Numerical and experimental study Twist channel multi-angular pressing (TCMAP) as a new SPD process: Numerical and experimental study
skos:prefLabel
Twist channel multi-angular pressing (TCMAP) as a new SPD process: Numerical and experimental study Twist channel multi-angular pressing (TCMAP) as a new SPD process: Numerical and experimental study
skos:notation
RIV/61989100:27360/14:86091306!RIV15-MSM-27360___
n3:aktivita
n12:P
n3:aktivity
P(LO1203)
n3:cisloPeriodika
26 August 2014
n3:dodaniDat
n9:2015
n3:domaciTvurceVysledku
n14:8383146 n14:5000386 n14:8102457
n3:druhVysledku
n13:J
n3:duvernostUdaju
n16:S
n3:entitaPredkladatele
n10:predkladatel
n3:idSjednocenehoVysledku
51483
n3:idVysledku
RIV/61989100:27360/14:86091306
n3:jazykVysledku
n6:eng
n3:klicovaSlova
TCMAP; grain refinement; bulk deformation; aluminium alloys; finite element method
n3:klicoveSlovo
n4:TCMAP n4:grain%20refinement n4:finite%20element%20method n4:bulk%20deformation n4:aluminium%20alloys
n3:kodStatuVydavatele
CH - Švýcarská konfederace
n3:kontrolniKodProRIV
[74696A0C15D3]
n3:nazevZdroje
Materials Science and Engineering. A, Structural Materials : Properties, Microstructure and Processing
n3:obor
n8:JG
n3:pocetDomacichTvurcuVysledku
3
n3:pocetTvurcuVysledku
3
n3:projekt
n17:LO1203
n3:rokUplatneniVysledku
n9:2014
n3:svazekPeriodika
612
n3:tvurceVysledku
Kunčická, Lenka Macháčková, Adéla Kocich, Radim
n3:wos
000340331300055
s:issn
0921-5093
s:numberOfPages
11
n5:doi
10.1016/j.msea.2014.06.079
n19:organizacniJednotka
27360