Investigations of Plasticity of Hard-Deformed Aluminium Alloys of 5xxx Series Using Torsion Plastometer

Abstract

This paper presents the results of the study aimed at determination of plasticity of selected grades of hard-deformed aluminium alloys of 5xxx series in terms of parameters characteristic for the process of extrusion. The examinations were carried out for 5083 and 5754 alloys in the torsion test using STD 812 torsion plastometer. Using the empirical tests, the study evaluated yield stress of alloys depending on strain, strain rate and temperature and the results were approximated and mathematical models of rheological properties of the aluminium grades studied were determined within the range of parameters of deformation and temperature.

Моделирование Временных Эффектов Необратимого Деформирования На Основе Релаксационной Модели Пластичности

“…При этом деформирование рассматривалось как квазистатическое, несмотря на зависимость деформационной кривой от скорости воздействия. Наличие эффекта зуба текучести для металлов наблюдается на скоростях деформации порядка 10 2 −10 3 s −1 [22,23], а также на скоростях деформации 10 −2 −10 1 s −1 [24][25][26]. На основе кинетического варианта модели релаксационной пластичности максвелловского типа [3,4] в работе [27] для меди, кадмия и стали были спрогнозированы динамические эффекты, в том числе эффект зуба текучести, наблюдаемые на скоростях деформации 10 −5 −10 −2 s −1 .…”

Study of the Strain Resistance During the Tests of the Wheel Steel

“…The value must be known to assess the heterogeneity of strength and mechanical properties in the volume of the metal, to calculate the power parameters of the process, which determine the stable flow of the metal deformation process. Many works are devoted to the development of adequate mathematical models for strain resistance calculations [1][2][3][4][5][6][7][8][9][10]. Most of the studies based on the plastometer tests, which allow to consider the influence of degree , rate and temperature of deformation on .…”

Analysis of the Rolling Process of Alloy 6005 in a Three-High Skew Rolling Mill

“…Magnesium alloys were studied by Dobatkin et al [18] and Gryc et al [19].The continued interest in aluminum alloy products has caused the implementation of increasingly new technologies of their plastic working processes, which requires the proper design of the process to obtain products with high mechanical properties at a relatively small weight. The selection parameters of plastic working processes are currently based on numerical analyses of many technological variants, whereby the costs of implementing and adapting new technologies to industrial conditions can be reduced [20,21].By modifying the deformation scheme, it is possible to improve the mechanical properties of the finished product. Methods based on the process of rolling bars in a three-high skew mill combine different deformation schemes.…”

“…The continued interest in aluminum alloy products has caused the implementation of increasingly new technologies of their plastic working processes, which requires the proper design of the process to obtain products with high mechanical properties at a relatively small weight. The selection parameters of plastic working processes are currently based on numerical analyses of many technological variants, whereby the costs of implementing and adapting new technologies to industrial conditions can be reduced [20,21].…”