Improvement of nonmonotone deformation technology in plastic metal working

2021 ◽  
pp. 115-122
Author(s):  
S.M. Vaytsekhovich ◽  
Yu.V. Vlasov ◽  
A.Yu. Zhuravlev
Keyword(s):  
Experimental Investigation ◽  
Simple Shear ◽  
Strain State ◽  
Effectiveness Evaluation ◽  
Inhomogeneous Body ◽  
Metal Working ◽  
Practical Application ◽  
Angular Pressing ◽  
Plastic Metal ◽  
Rational Sequence

The production of semi-finished products made of refractory metals is considered. The advantage of parts production using combination of two types of straining with change in the straining direction: direct extrusion and equal-channel pressing is shown. The experimental investigation data of pure and simple shear for the semi-finished products processing made of tungsten and molybdenum are presented. Requirements for the tool providing diagonal flow and angular straining are formulated based on the analysis of the stress-strain state of the processes of axial symmetric extrusion and simple shear of plastically inhomogeneous body. Effectiveness evaluation of the combination of various types of fixtures and the rational sequence for using of diagonal flow and angular pressing is given. Experimental devices for practical application of the proposed technology are developed.

Analysis of the stress-strain state of copper M0B under different schemes of equal channel angular pressing and its effect on the structure and physical and mechanical properties

2019 ◽  
pp. 47-53
Author(s):  
L. F. Sennikova ◽  
G. K. Volkova ◽  
V. M. Tkachenko
Keyword(s):  
Equal Channel Angular Pressing ◽  
Strain State ◽  
Physical And Mechanical Properties ◽  
Strength Properties ◽  
Stress Strain ◽  
Loading Pattern ◽  
Stress Strain State ◽  
Angular Pressing ◽  
Fine Copper ◽  
Copper Structure

The results of studies of the stress-strain state of copper M0b after deformation under different schemes of equal channel angular pressing (ECAP) are presented. The level of macro and micro stresses in copper has been determined in various ECAP modes. It is shown that the strength properties, deformation porosity and parameters of the fine copper structure differ depending on the loading pattern.

On the stochastic optimization problems of plastic metal-working processes

1997 ◽  
Vol 84 (3) ◽  
pp. 1109-1112 ◽  
Author(s):  
M. B. Gitman ◽  
P. V. Trusov ◽  
S. A. Fedoseev
Keyword(s):  
Stochastic Optimization ◽  
Optimization Problems ◽  
Metal Working ◽  
Plastic Metal ◽  
Working Processes

scholarly journals Simulation and Experimental Investigation for the Homogeneity of Ti49.2Ni50.8 Alloy Processed by Equal Channel Angular Pressing

Metals ◽  
2016 ◽  
Vol 6 (3) ◽  
pp. 45 ◽  
Author(s):  
Diantao Zhang ◽  
Mohamed Osman ◽  
Li Li ◽  
Yufeng Zheng ◽  
Yunxiang Tong
Keyword(s):  
Experimental Investigation ◽  
Equal Channel Angular Pressing ◽  
Angular Pressing

Significance of Microdefects Induced by ECAP in Aluminium, Al-0.2%Sc Alloy and Copper

2007 ◽  
Vol 567-568 ◽  
pp. 93-96 ◽  
Author(s):  
Vladimir I. Betekhtin ◽  
Andrey G. Kadomtsev ◽  
Petr Král ◽  
Jiří Dvořák ◽  
Milan Svoboda ◽  
...  
Keyword(s):  
Experimental Investigation ◽  
Equal Channel Angular Pressing ◽  
Pure Aluminium ◽  
Creep Properties ◽  
Angular Pressing

This paper deals with an experimental investigation of the effect of various microdefects induced by equal-channel angular pressing (ECAP) on mechanical and creep properties of ultrafinegrained pure aluminium, an Al-0.2%Sc alloy and copper.

A Numerical Analysis on the Dissimilar Channel Angular Pressing Process by Rolling

2005 ◽  
Vol 475-479 ◽  
pp. 3231-3234 ◽  
Author(s):  
Moo Young Huh ◽  
Hyoung Jin Choi ◽  
J.H. Ok ◽  
Beong Bok Hwang ◽  
Bok Choon Kang
Keyword(s):  
Strain State ◽  
Model Material ◽  
Radius Of Curvature ◽  
Strain Component ◽  
Large Radius ◽  
Rigid Plastic ◽  
Center Layer ◽  
Angular Pressing ◽  
Dimensional Finite Element ◽  
Deformation Mechanics

The dissimilar channel angular pressing (DCAP) process by rolling was numerically modeled and analyzed by the rigid-plastic two-dimensional finite element method in order to optimize the strain state of the DCAP process. Three distinct deformation mechanics during DCAP by rolling includes rolling, bending, and shearing. AA 1100 aluminum alloy was selected as a model material for the analysis of DCAP process. Difference in the friction conditions between the upper and lower roll surfaces led to large variation of shear strain component throughout the thickness of sample. Strain accompanying bending turned out to be negligible because of a large radius of curvature by relatively large roll diameter. The concentrated shear deformation was monitored at the corner of the DCAP-channel where the abrupt change in the direction of material flow occurred. The strain state at the upper and lower surfaces was observed to vary strongly from that of the center layer of the sheet.

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