Deformation field variations in equal channel angular extrusion due to back pressure

Hasani, Arman; Lapovok, Rimma; Tóth, László; Molinari, A.

doi:10.1016/j.scriptamat.2007.12.018

Cited by 44 publications

(41 citation statements)

References 9 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…non-monotonic change of direction of the principal increments of strain. It is important to note that the main indicator of non-monotonicity is not only the quantity of parameters in the published flow line model [2] - [3], but an algebraic structure of phenomenological expression for flow function, which ensures a plot of correspondent flow trajectories with a sign reversal of the second derivative. An important new research result of the present study presents itself in the experimentally-derived data in Fig.…”

Section: Discussionmentioning

confidence: 99%

“…The present research is focused on an experimental verification of the known previously published research results by Han et al (2008), Hasani et al (2008) -Hosseini et al (2009), and Tóth et al (2004 for material flow lines through a die of classical Segal geometry. The experimental research used physical simulation techniques to visualize moving marker trajectories in the vicinity of the channel intersection zone during ECAE of plasticine models.…”

mentioning

confidence: 85%

“…4 -5), while Hasani et al (2008) [2] and Hosseini et al (2009) [3] (Fig. 6 -7) assume material flow lines as concentric elliptical arcs.…”

Section: Introduction the State Of The Artmentioning

confidence: 99%

“…A model describing the Equal-Channel Angular Extrusion (ECAE) flow-lines family and defined by three geometric parameters α, n and μ was proposed by Hasani et al (2008) [2] and additionally analyzed by Hosseini et al (2009) [3] (Fig. 6 -7).…”

Section: Introduction the State Of The Artmentioning

confidence: 99%

See 3 more Smart Citations

The experimental verification of the known flow line models describing local flow during ECAE (ECAP)

Perig¹,

Galan²

2017

LoM

View full text Add to dashboard Cite

In spite of the existence of a number of studies suggesting various models of flow-lines during ECAE, there are few studies dedicated to the experimental visualization of the empirically observable flow-lines. The present research is focused on an experimental verification of the known previously published research results by Han et al (2008), Hasani et al (2008) -Hosseini et al (2009), and Tóth et al (2004 for material flow lines through a die of classical Segal geometry. The experimental research used physical simulation techniques to visualize moving marker trajectories in the vicinity of the channel intersection zone during ECAE of plasticine models. The successive positions of moving markers were recorded with a digital camera with further recognition and digitalization of experimental marker trajectories. This research has shown that experimental flow-lines do not fully fit Toth et al's and Han et al's flow models. It was found that the best fit of experimental flow-lines is achieved by using of Hasani et al's -Hosseini et al's model. Experimental / theoretical results which were obtained in the current study are of interest to the interdisciplinary SPD mechanics sphere. The experimental verification of the earlier published models quoted in the paper provides the succession, sustainability and academic integrity of the experimental / theoretical results from the SPD mechanics of the various schools of sciences. New results of the study relate to the experimental visualization of the moving markers positions during ECAE physical modeling and the experimental / theoretical determination of corresponding empirical flow-lines. Экспериментальное исследование использует методы физиче-ского моделирования для визуализации траекторий движущихся маркеров в зоне пересечения каналов при РКУП пластилиновых моделей деформируемых заготовок. Последовательные положения движущихся маркеров были за-писаны с использованием цифровой камеры с дальнейшим распознаванием и оцифровыванием экспериментальных траекторий маркеров. Настоящее исследование выявило, что экспериментально-полученные линии тока не в пол-ной мере совпадают с моделями Tóth и др. и Han и др. для РКУП-линий тока. Было установлено, что наилучшее согласование эмпирически-установленных линий тока с ранее опубликованными результатами имеет место для мо-делей Hasani и др. -Hosseini и др. Экспериментально-теоретические результаты, полученные в рамках представ-ленного исследования, представляют интерес для междисциплинарной сферы ИПД механики. Экспериментальная верификация ранее опубликованных моделей, выполненная в данной работе, способствует преемственности, ста-бильности и академической достоверности теоретико-экспериментальных результатов по механике ИПД между различными школами исследователей. Оценка условий трения при физическом моделировании РКУП выполнялась в рамках применения методики De Pierre и др. (1972) по осадке 6 : 3 : 2 колец, несмотря на отличия параметра Nádai-Lode в ОМД-схемах РКУП и осадки колец. Новые результаты данного исследования относятся к воп...

show abstract

Section: Discussionmentioning

confidence: 99%

mentioning

confidence: 85%

“…4 -5), while Hasani et al (2008) [2] and Hosseini et al (2009) [3] (Fig. 6 -7) assume material flow lines as concentric elliptical arcs.…”

Section: Introduction the State Of The Artmentioning

confidence: 99%

Section: Introduction the State Of The Artmentioning

confidence: 99%

See 2 more Smart Citations

The experimental verification of the known flow line models describing local flow during ECAE (ECAP)

Perig¹,

Galan²

2017

LoM

View full text Add to dashboard Cite

show abstract

“…In the upper section it is slightly smaller, while in the lower section it drastically increases for all BPs applied. The broadening of the PDZ with BP has been shown by scribed grids on furnace-cooled aluminum alloy AA 6016-O [8].…”

Section: Introductionmentioning

confidence: 95%

Effect of back pressure on material flow and texture in ECAP of aluminum

Panigrahi

Scheerbaum

Chekhonin

et al. 2014

IOP Conf. Ser.: Mater. Sci. Eng.

View full text Add to dashboard Cite

Deformation Field Analysis in Equal Channel Angular Extrusion of Metals Using Asymmetric Flow Function

Hasani

Tóth

2015

Adv Eng Mater

Self Cite

View full text Add to dashboard Cite

The trajectory and the corresponding plastic deformation of a material element during equal channel angular extrusion (ECAE) are analyzed with the help of a flow line function applicable for any ECAE die angle. The function contains the following three parameters: the parameter n that describes the sharpness of the line and the a and m parameters that account for the asymmetry of the flow line. The approach permits to determine the velocity field, the strain rate field, and, in general, the shape of the plastic deformation zone in ECAE experiments even for flow lines that are asymmetric with respect to the ECAE geometry. The flow line function was applied to flow lines observed in 90°and 120°ECAE of commercially pure aluminum as well as for 135°ECAE of pure copper to describe the characteristics of the deformation field and the evolution of the crystallographic texture.

show abstract

Deformation field variations in equal channel angular extrusion due to back pressure

Cited by 44 publications

References 9 publications

The experimental verification of the known flow line models describing local flow during ECAE (ECAP)

The experimental verification of the known flow line models describing local flow during ECAE (ECAP)

Effect of back pressure on material flow and texture in ECAP of aluminum

Deformation Field Analysis in Equal Channel Angular Extrusion of Metals Using Asymmetric Flow Function

Contact Info

Product

Resources

About