Variation of Extrusion Process Parameter for the Magnesium Alloy ME21

2020 ◽  
pp. 181-188
Author(s):  
G. Kurz ◽  
M. Nienaber ◽  
J. Bohlen ◽  
D. Letzig ◽  
K. U. Kainer
Keyword(s):  
Magnesium Alloy ◽  
Extrusion Process ◽  
Process Parameter

Mechanical properties and wear-corrosion resistance of a new compound extrusion process for magnesium alloy AZ61

2020 ◽  
Vol 62 (4) ◽  
pp. 395-399
Author(s):  
Jiehui Liu ◽  
Hongjun Hu ◽  
Yang Liu ◽  
Dingfei Zhang ◽  
Zhongwen Ou ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Wear Resistance ◽  
Magnesium Alloy ◽  
Equal Channel Angular Extrusion ◽  
Extrusion Process ◽  
Corrosion And Wear ◽  
Nacl Solution ◽  
Corrosion Properties ◽  
Manufacturing Method ◽  
Az61 Magnesium Alloy

Abstract Compound extrusion (CE) is a newly developed plastic deformation technique which combines direct extrusion (DE) with a two-pass equal channel angular extrusion (ECAE). This paper focuses on the strength, ductility and anti-corrosion properties of an NaCl solution at certain concentrations and the wear-resistance of dry sliding AZ61 magnesium alloy prepared by CE and DE. It is found that the strength and elongation of the AZ61 alloy prepared by CE are enhanced because of grain refinement. Furthermore, AZ61 magnesium alloy made by CE displays higher corrosion and wear resistance than that prepared by DE. Experimental results prove that CE is a prospective manufacturing method for improving the mechanical properties, anti-corrosion and anti-wear of AZ61 magnesium alloy.

Taguchi based genetic approach for optimizing the PVD process parameter for coating ZrN on AZ91D magnesium alloy

2016 ◽  
Vol 90 ◽  
pp. 713-722 ◽  
Author(s):  
M. Sivapragash ◽  
P. Kumaradhas ◽  
B. Stanly Jones Retnam ◽  
X. Felix Joseph ◽  
U.T.S. Pillai
Keyword(s):  
Magnesium Alloy ◽  
Process Parameter ◽  
Genetic Approach ◽  
Az91d Magnesium Alloy

scholarly journals Effect of Cyclic Expansion-Extrusion Process on Microstructure, Deformation and Dynamic Recrystallization Mechanisms, and Texture Evolution of AZ80 Magnesium Alloy

2019 ◽  
Vol 2019 ◽  
pp. 1-10 ◽  
Author(s):  
Yong Xue ◽  
Shuaishuai Chen ◽  
Haijun Liu ◽  
Zhimin Zhang ◽  
Luying Ren ◽  
...  
Keyword(s):  
Magnesium Alloy ◽  
Dynamic Recrystallization ◽  
Grain Refinement ◽  
Texture Evolution ◽  
Extrusion Process ◽  
Basal Texture ◽  
Continuous Dynamic Recrystallization ◽  
Distributed Structure ◽  
Texture Intensity ◽  
Az80 Magnesium Alloy

The microstructure, deformation mechanisms, dynamic recrystallization (DRX) behavior, and texture evolution of AZ80 magnesium alloy were investigated by three-pass cyclic expansion-extrusion (CEE) tests. Optical microscopy (OM), electron back-scattered diffraction (EBSD), and X-ray diffraction (XRD) were employed to study microstructure, grain orientation, DRX mechanism, and texture evolution. The results show that the grain sizes decrease continuously with the increase of CEE pass. The grain refinement effect of the first pass is the most remarkable, and there appear a large number of twins. After three-pass CEE, a well-distributed structure with fine equiaxed grains is obtained. With the increase of CEE pass, the deformation mechanism changes from twinning to slipping and the DRX mechanism changes mainly from twinning-induced dynamic recrystallization (TDRX) to rotation dynamic recrystallization (RDRX) and then to continuous dynamic recrystallization (CDRX). The grain misorientation between the new grains and matrix grains deceases gradually, and a relatively small angle misorientation is obtained after three-pass CEE. Grain misorientations of the first two passes are attributed to TDRX and RDRX behaviors, respectively. The grain refinement changes the deformation and DRX mechanisms of CEE process, which leads the (0002) basal texture intensity first decrease and then increase suddenly. Eventually, the extremely strong basal texture is formed after three-pass CEE.

Aging Property of AZ91D Magnesium Alloy Screw Thread-Rolled at Room Temperature Using Extrusion-Torsion Simultaneous Processing

2016 ◽  
Vol 879 ◽  
pp. 2450-2455
Author(s):  
Mitsuaki Furui ◽  
Shouyou Sakashita ◽  
Shougo Suzuki ◽  
Tetsuo Aida ◽  
Yuusuke Ishisaka ◽  
...  
Keyword(s):  
Magnesium Alloy ◽  
Room Temperature ◽  
Aging Treatment ◽  
High Strength ◽  
Extrusion Process ◽  
Peak Hardness ◽  
Screw Thread ◽  
Az91d Magnesium Alloy ◽  
Simultaneous Processing ◽  
Aging Property

We have proposed a new extrusion process functionally combined with torsion. Extrusion-torsion simultaneous processing is a very attractive technique for fabricating a rod-shape material with high strength and excellent workability. To improve the hardness, the aging treatment was performed with AZ91D magnesium alloy screw thread-rolled at room temperature using extrusion-torsion simultaneous processing. The distribution of hardness from the tip to center in as thread-rolled screw was modified to uniform distribution by the isothermal aging treatment at 423 K for 460.8 ks. The peak hardness was not depended on the working temperature and rotation speed during extrusion-torsion simultaneous processing. β-Mg17Al12 precipitates are obviously grown in as peak-aged condition comparing with as thread-rolled condition.

scholarly journals Properties of the AZ31 Magnesium Alloy Round Bars Obtained in Different Rolling Processes / Własności Prętów Okrągłych Ze Stopu Magnezu AZ31 Otrzymanych W Różnych Procesach Walcowania

2015 ◽  
Vol 60 (4) ◽  
pp. 3001-3006 ◽  
Author(s):  
A. Stefanik ◽  
P. Szota ◽  
S. Mróz ◽  
T. Bajor ◽  
H. Dyja
Keyword(s):  
Magnesium Alloy ◽  
Rolling Mill ◽  
Energy Demand ◽  
Experimental Studies ◽  
Tensile Tests ◽  
Modern Method ◽  
Extrusion Process ◽  
Mg Alloy ◽  
Static Tensile ◽  
Skew Rolling

Currently magnesium alloy bars are manufactured mainly in the extrusion process. This method has some drawbacks, which include: low process capacity, considerable energy demand, small length of finished products. Therefore it is purposeful to develop efficient methods for manufacturing of Mg alloy products in the form of bars, such methods include groove rolling and three-high skew rolling processes. Modified stretching passes provide change in material plastic flow, which contributes to the occurrence of the better distribution of stress and strain state than in the case of rolling in classical stretching passes. One of the modern method of Mg alloy bars production is rolling in a three-high skew rolling mill, which allows to set in a single pass a larger deformation compared to the rolling in the stretching passes. The paper presents the results of experimental studies of the AZ31 round bars production in the modified stretching passes and in the three-high skew rolling mill. The study of microstructural changes, hardness and the static tensile tests were made for as-cast and ready-rolled bars in both analyzed technologies.

Manufacturing Technology and Usable Properties of Magnesium Alloy after Plastic Deformation

2014 ◽  
Vol 783-786 ◽  
pp. 443-448 ◽  
Author(s):  
Bartłomiej Płonka ◽  
Krzysztof Remsak ◽  
Marek Nowak ◽  
Marzena Lech-Grega ◽  
Piotr Korczak
Keyword(s):  
Mechanical Properties ◽  
Plastic Deformation ◽  
Corrosion Resistance ◽  
Magnesium Alloy ◽  
Considerable Increase ◽  
Extrusion Process ◽  
Die Forging ◽  
Higher Temperature ◽  
Ram Speed ◽  
Anodic Oxidation Method

The object of this study was to develop parameters of plastic deformation in hot direct extrusion and die forging process of magnesium alloy MgAlZn. Extrusion process was conducted in the temperature range 350°C÷450°C at different extrusion speeds (ram speed 0.5 mm/s÷3 mm/s). The extrusion tests have showed that for this alloy it is possible to use the temperature of the extruded material ranging from 350°C÷450°C when the process is run at the optimum ram speed. Higher temperature of extrusion is beneficial For higher ram speed of 3mm/s, in this alloy at a temperature of 420÷450°C, cracks began to show in the surface. The same problem were for die forging. Extruded rods and forging parts were characterized by mechanical properties and structure in different heat treatment tempers. This magnesium alloy obtained in the T5 temper higher mechanical properties then T6 temper. The paper also presents research results of investigation of conversion coating on MgAlZn magnesium alloy by anodic oxidation method in non-chromium solutions. It was found that the coating produced in non-chromium solutions show considerable increase of corrosion resistance of tested alloy.Keywords: Mg alloys, extrusion, mechanical properties, structure, corrosion resistance.

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