Static recrystallization mechanism in cold-rolled magnesium alloy with off-basal texture based on quasi in situ EBSD observations

2020 ◽  
Vol 844 ◽  
pp. 156185 ◽  
Author(s):  
Sang Won Lee ◽  
Sung Hyuk Park
Keyword(s):  
Magnesium Alloy ◽  
Static Recrystallization ◽  
Basal Texture ◽  
Recrystallization Mechanism ◽  
Cold Rolled

scholarly journals Statistical Analysis on Static Recrystallization Texture Evolution in Cold-Rolled AZ31 Magnesium Alloy Sheet

2013 ◽  
Vol 19 (S5) ◽  
pp. 21-24 ◽  
Author(s):  
Jun-Ho Park ◽  
Tae-Hong Ahn ◽  
Hyun-Sik Choi ◽  
Jung-Man Chung ◽  
Dong-Ik Kim ◽  
...  
Keyword(s):  
Magnesium Alloy ◽  
Thermomechanical Processing ◽  
Texture Evolution ◽  
Rolling Direction ◽  
Alloy Sheet ◽  
Basal Texture ◽  
Rolled Sample ◽  
Az31 Magnesium Alloy Sheet ◽  
Cold Rolled ◽  
Grain Orientation Spread

AbstractCast AZ31B-H24 magnesium alloy, comprising Mg with 3.27 wt% Al and 0.96 wt% Zn, was cold rolled and subsequently annealed. Global texture evolutions in the specimens were observed by X-ray diffractometry after the thermomechanical processing. Image-based microstructure and texture for the deformed, recrystallized, and grown grains were observed by electron backscattered diffractometry. Recrystallized grains could be distinguished from deformed ones by analyzing grain orientation spread. Split basal texture of ca. ±10–15° in the rolling direction was observed in the cold-rolled sample. Recrystallized grains had widely spread basal poles at nucleation stage; strong {0001} basal texture developed with grain growth during annealing.

Orientational Analysis on Static Recrystallization at Tension Twins in AZ31 Magnesium Alloy

2011 ◽  
Vol 299-300 ◽  
pp. 778-784
Author(s):  
Xiao Li ◽  
Ping Yang ◽  
Li Meng
Keyword(s):  
Magnesium Alloy ◽  
Static Recrystallization ◽  
Volume Fraction ◽  
Early Stage ◽  
Nucleation Site ◽  
Az31 Magnesium Alloy ◽  
Basal Texture ◽  
Promotive Effect ◽  
Ebsd Technique ◽  
Evolution Of Microstructure

The deformation depends on twinning in Mg alloy, and twins will be the dominant recrystallization nucleation site. Tension twinning proceeds much more easily than compression twinning since its volume fraction is much higher than that of compression twins, which may have a promotive effect on the recrystallization to a certain degree. Based on the previous research on the static recrystallization at compression twins, the evolution of microstructure and texture in AZ31 magnesium alloy during its static recystallization at tension twins was further investigated; and the orientational characteristics of new grains formed at tension twins in the early stage of static recrystallization were analyzed by EBSD technique. The results showed that the strong basal texture was retained and weakened with no new texture component being detected during annealing. New grains were observed to nucleate preferentially at the intersections of tension twin variants or the intersection between tension twins and compression twins. Their orientations are relatively random and are strongly scattered from those of original tension twins or compression twins. A comparison of the recrystallization at tension twins and compression twins was further made.

EFFECT OF SAMPLE ORIENTATION ON STATIC RECRYSTALLIZATION OF AZ31 MAGNESIUM ALLOY

2012 ◽  
Vol 48 (8) ◽  
pp. 915 ◽  
Author(s):  
Hongtao HUANG ◽  
Andrew Godfrey ◽  
Wei LIU ◽  
Ruihe TANG ◽  
Qing LIU
Keyword(s):  
Magnesium Alloy ◽  
Static Recrystallization ◽  
Az31 Magnesium Alloy ◽  
Sample Orientation

scholarly journals In situ monitoring of dislocation, twinning, and detwinning modes in an extruded magnesium alloy under cyclic loading conditions

2021 ◽  
Vol 806 ◽  
pp. 140860
Author(s):  
Di Xie ◽  
Zongyang Lyu ◽  
Yuan Li ◽  
Peter K. Liaw ◽  
Huck Beng Chew ◽  
...  
Keyword(s):  
Magnesium Alloy ◽  
Cyclic Loading ◽  
In Situ Monitoring ◽  
Loading Conditions

scholarly journals Simulation of the Texture Evolution During Annealing of Cold Rolled Bcc and Fcc Metals Using a Cellular Automation Approach

1997 ◽  
Vol 28 (3-4) ◽  
pp. 211-218 ◽  
Author(s):  
V. Marx ◽  
D. Raabe ◽  
O. Engler ◽  
G. Gottstein
Keyword(s):  
Static Recrystallization ◽  
Texture Evolution ◽  
Three Dimensional ◽  
Deformation Texture ◽  
Three Dimensional Model ◽  
Static Recovery ◽  
Fcc Metals ◽  
Cellular Automation ◽  
Texture Change ◽  
Cold Rolled

In this study both primary static recrystallization and static recovery of cold rolled bcc and fcc metals and alloys are numerically simulated using a three-dimensional model that is based on a modified cellular automaton approach. The model considers the influence of the initial deformation texture and microstructure on both static recovery and primary static recrystallization with a high spatial resolution. The cellular automat technique provides both local and statistical information about the kinetics, the morphology and the texture change during annealing. The influence of nucleation and growth can be studied in detail. The simulations are compared to experimental results obtained on fcc and bcc polycrystals.

In situ observation of ageing process and new morphologies of continuous precipitates in AZ91 magnesium alloy

2007 ◽  
Vol 61 (25) ◽  
pp. 4707-4710 ◽  
Author(s):  
J.P. Zhou ◽  
D.S. Zhao ◽  
R.H. Wang ◽  
Z.F. Sun ◽  
J.B. Wang ◽  
...  
Keyword(s):  
Magnesium Alloy ◽  
Ageing Process ◽  
In Situ Observation ◽  
Az91 Magnesium Alloy ◽  
Az91 Magnesium

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.

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