scholarly journals Theoretical and Experimental Research on Forge Rolling Process of Preforms From Magnesium Alloy AZ31

2015 ◽  
Vol 60 (1) ◽  
pp. 437-443 ◽  
Author(s):  
T. Bulzak ◽  
J. Tomczak ◽  
Z. Pater
Keyword(s):  
Magnesium Alloy ◽  
Experimental Research ◽  
Material Flow ◽  
Rolling Process ◽  
Numerical Calculations ◽  
Alloy Az31 ◽  
Magnesium Alloy Az31 ◽  
Tangential Stresses ◽  
The Moment

Abstract This paper presents results of theoretical and experimental research works on the rolling process of a lever preform from magnesium alloy AZ31. The forge rolling process of the preform was realized in the system oval-circle. The paper focuses mainly on kinematics of material flow and proper filling of rolling impressions. Research aiming at determining possibilities of faults presence in the form of cracks, overlapping and improper filling of the impressions were also conducted. During experimental research it was noticed that material cracking took place at the moment of material clamping by rolls. Moreover, it was stated that this cracking may be the result of large shearing stresses action, appearing at the moment of material clamping by rolls. Shearing stresses values were determined on the basis of numerical calculations. Next, tools were modified in order to lower tangential stresses at the moment of material clamping by rolls. The further experimental research with modified tools confirmed the rightness of the assumptions. On the basis of conducted works on the forge rolling process of magnesium alloy AZ31, it was stated that when material is clamped by tools tangential stresses intensification should not take place.

Experimental Research on a Novel Iodine-125 Seed Strand Connected Using Magnesium Alloy AZ31

2014 ◽  
Vol 9 (2) ◽  
pp. 249-257
Author(s):  
Chuanxing Li ◽  
Yanling Zhang ◽  
Dong Chen ◽  
Guangfeng Duan ◽  
Zhenyin Liu ◽  
...  
Keyword(s):  
Magnesium Alloy ◽  
Experimental Research ◽  
Alloy Az31 ◽  
Magnesium Alloy Az31 ◽  
Iodine 125

Experimental and Numerical Investigation of Texture Development during Hot Rolling of Magnesium Alloy AZ31

2007 ◽  
Vol 539-543 ◽  
pp. 3448-3453 ◽  
Author(s):  
C. Schmidt ◽  
Rudolf Kawalla ◽  
Tom Walde ◽  
Hermann Riedel ◽  
A. Prakash ◽  
...  
Keyword(s):  
Magnesium Alloy ◽  
Hot Rolling ◽  
Rolling Texture ◽  
Rolling Process ◽  
Model Parameters ◽  
Compression Tests ◽  
Basal Texture ◽  
Alloy Az31 ◽  
Magnesium Alloy Az31 ◽  
Softening Behavior

Due to the deformation mechanisms and the typical basal texture rolled magnesium sheets show a significant asymmetry of flow stress in tension and compression. In order to avoid this undesired behavior it is necessary to achieve non-basal texture during rolling, or at least, to reduce the intensity of the basal texture component. The reduction of the anisotropy caused by the basal texture is very important for subsequent forming processes. This project aims at optimizing the hot rolling process with special consideration of texture effects. The development of the model is carried out in close cooperation with the experimental work on magnesium alloy AZ31 .The experimental results are required for the determination of model parameters and for the verification of the model. Deformation-induced texture is described by the visco-plastic self-consistent (VPSC) model of Lebensohn and Tomé. The combination of deformation and recrystallization texture models is applied to hot compression tests on AZ31, and it is found, that the model describes the observed texture and hardening/softening behavior well. In some cases rotation recrystallization occurs in AZ31 which appears to be a possibility to reduce the undesired basal rolling texture.

Press Forging of Magnesium Alloy AZ31 Sheets

2007 ◽  
Vol 539-543 ◽  
pp. 1753-1758 ◽  
Author(s):  
Shi Hong Zhang ◽  
Zhang Gang Li ◽  
Yong Chao Xu ◽  
Li Mei Ren ◽  
Zhong Tang Wang ◽  
...  
Keyword(s):  
Numerical Simulation ◽  
Magnesium Alloy ◽  
Process Parameters ◽  
Material Flow ◽  
Friction Condition ◽  
Experimental Results ◽  
Alloy Az31 ◽  
Magnesium Alloy Az31 ◽  
Typical Component ◽  
Blank Size

Press forging of magnesium alloy AZ31 sheets was investigated in this paper. The typical component, a rectangular box with bosses at the bottom was formed. The experimental results show that the magnesium alloy sheets are suitable for press forging. The bosses and the rectangular box can be formed synchronously for 2 mm or 3 mm thick sheets when the punch temperature is 250 °C. By experimentation and numerical simulation, the effects of process parameters on material flow were analyzed, including the temperature, the die shape, the blank size, the lubrication manners and the friction condition.

A comparative study of plastic deformation mechanisms in room-temperature and cryogenically deformed magnesium alloy AZ31

2021 ◽  
Vol 807 ◽  
pp. 140821
Author(s):  
Kai Zhang ◽  
Zhutao Shao ◽  
Christopher S. Daniel ◽  
Mark Turski ◽  
Catalin Pruncu ◽  
...  
Keyword(s):  
Plastic Deformation ◽  
Magnesium Alloy ◽  
Comparative Study ◽  
Room Temperature ◽  
Deformation Mechanisms ◽  
Alloy Az31 ◽  
Magnesium Alloy Az31

Modelling Dynamic Recrystallisation in Magnesium Alloy AZ31

2021 ◽  
pp. 102995
Author(s):  
Kenneth J. Tam ◽  
Matthew W. Vaughan ◽  
Luming Shen ◽  
Marko Knezevic ◽  
Ibrahim Karaman ◽  
...  
Keyword(s):  
Magnesium Alloy ◽  
Alloy Az31 ◽  
Magnesium Alloy Az31 ◽  
Dynamic Recrystallisation

Model of Microstructure Development in Hot Deformed Magnesium Alloy AZ31 Type

2013 ◽  
Vol 197 ◽  
pp. 232-237 ◽  
Author(s):  
Dariusz Kuc ◽  
Eugeniusz Hadasik
Keyword(s):  
Grain Size ◽  
Flow Stress ◽  
Magnesium Alloy ◽  
Rolling Process ◽  
Microstructure Development ◽  
Compression Tests ◽  
Magnesium Alloy Az31 ◽  
Hot Rolling Process ◽  
Alloy Type ◽  
Relaxation Curves

The paper presents a model of microstructure changes elaborated for magnesium alloy type AZ31. In previous papers, the function of flow stress was defined on the basis of uniaxial hot compression tests. On the basis of marked relaxation curves and quantitative tests of structure the softening indicators were defined together with elaboration of equations which describe the changes in the grain size. Marked coefficients of equations were introduced in the code of simulation program. Calculations were conducted for given temperature values from 450 ÷ 250°C and strain rate from 0.01 to 10 s-1, which correspond with rolling temperature range of this alloy. Prepared model will allow the proper choice of parameters in hot rolling process of this alloy to achieve the assumed microstructure.

Improvement in Mechanical Properties of Magnesium Alloy (AZ31) Sheet Fabricated by Casting and Subsequent Plastic Working

2003 ◽  
Vol 439 ◽  
pp. 227-232
Author(s):  
Jae Wan Song ◽  
Chang Won Kim ◽  
Jeong Whan Han ◽  
Mok Soon Kim ◽  
Sun Keun Hwang
Keyword(s):  
Mechanical Properties ◽  
Magnesium Alloy ◽  
Plastic Working ◽  
Alloy Az31 ◽  
Magnesium Alloy Az31 ◽  
Az31 Sheet
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