Results 271 to 280 of about 31,262 (307)

Strain localisation patterns under equal-channel angular pressing

Journal of the Mechanics and Physics of Solids, 2009
Instabilities of plastic flow in the form of localised shear bands were experimentally observed to result from equal-channel angular pressing (ECAP) of magnesium alloy AZ31. The appearance of shear bands and their spacing were dependent on velocity of the pressing and applied back-pressure.
Rimma Lapovok, László S. Tóth, Alain Molinari, Yuri Estrin   +3 more
openaire   +1 more source

Equal Channel Angular Pressing of Al Alloy AA2219

Advanced Materials Research, 2009
Severe plastic deformation processes (SPD) are gaining importance as advanced materials processing techniques and hold immense potential in obtaining ultra fine-grained high strength materials. Among the SPD techniques, Equal channel angular pressing (ECAP) has its own merits to produce materials with ultra fine grains in bulk with better mechanical ...
V. Anil Kumar, M.K. Karthikeyan, Rohit Kumar Gupta, P. Ramkumar, P.P. Sinha   +4 more
openaire   +1 more source

Incremental Equal Channel Angular Pressing for Grain Refinement

Materials Science Forum, 2011
Creating a small amount of ultrafine grained metals by severe plastic deformation, for example using equal channel angular pressing, is possible in many research laboratories. However, industrial production of these materials is lagging behind because of the lack of industrially viable severe plastic deformation processes.
Rosochowski, Andrzej, Olejnik, J
openaire   +2 more sources

Optimum processing parameters for equal channel angular pressing

Mechanics of Materials, 2016
Abstract This study aims to explore the optimum processing parameters for minimum strain coefficient of variance in equal channel angular pressing based on the analysis of whole steady zone. In order to design the die correctly, it is important to understand the effect of die geometry and processing parameters on the deformation behavior, strain ...
M.A. Agwa, M.N. Ali, Amal E. Al-Shorbagy
openaire   +1 more source

Obtaining a Nanostructure in Titanium by Equal-Channel Angular Pressing

Metal Science and Heat Treatment, 2000
1. We have developed a technological setup for isothermal equal-channel angular pressing (ECAP) for hard-to-deform materials that serve at up to 500°C and specific loads on the punch of up to 2000 MPa.
G. I. Raab, R. Z. Valiev
openaire   +1 more source

Recrystallization of high-purity aluminium during equal channel angular pressing

Acta Materialia, 2007
Aluminium with 5N purity were deformed at room temperature by equal channel angular pressing following Route A up to three passes. The microstructure and the crystallographic texture were investigated by orientation imaging microscopy and electron backscatter diffraction, respectively.
Skrotzki, W, Scheerbaum, N, Oertel, C-G, Brokmeier, H-G, Suwas, S, To'th, LS   +5 more
openaire   +2 more sources

Analyses of route Bc equal channel angular pressing and post-equal channel angular pressing behavior by the finite element method

Journal of Materials Science, 2010
Equal channel angular pressing (ECAP) process provides an efficient procedure for achieving ultrafine grained microstructures with excellent mechanical properties in metallic materials. In this article, a simulation scheme for predicting the mechanical behavior during and after ECAP was proposed.
Yoon, EY, Yoo, JH, Yoon, SC, Kim, YK, Baik, SC, Kim, HS   +5 more
openaire   +2 more sources

Equal Channel Angular Pressing in a Pearlitic Structured Steel

Materials Science Forum, 2007
Equal Channel Angular Pressing (ECAP) in a fully pearlitic structured steel 65Mn was successfully carried out at 923 K via route C in this study. The severe shear deformation of ECAP was accommodated by periodical bending, periodical shearing and shearing fracture etc in the pearlitic lamellae.
Jun Xia Huang, Jing Tao Wang
openaire   +1 more source

Ultrafine grained steels processed by equal channel angular pressing

Materials Science and Engineering: A, 2005
Abstract Recent development of ultrafine grained (UFG) low carbon steels by using equal channel angular pressing (ECAP) and their room temperature tensile properties are reviewed, focusing on the strategies overcoming their inherent mechanical drawbacks.
Dong Hyuk Shin, Kyung-Tae Park
openaire   +1 more source

Grain Refinement of Aluminum using Equal-Channel Angular Pressing

MRS Proceedings, 1999
AbstractUsing the technique of equal-channel angular (ECA) pressing, it is possible to reduce the grain size of polycrystalline materials to the submicrometer level. Thus, this processing technique has the potential for producing materials which may exhibit superplasticity. This paper describes various factors affecting the development and evolution of
Z. Horita, M. Furukawa, M. Nemoto, T.G. Langdon   +3 more
openaire   +1 more source