Construction of edge cracks pre-criterion model based on hot rolling experiment and simulation of AZ31 magnesium alloy

2018 ◽  
Vol 5 (5) ◽  
pp. 056528 ◽  
Author(s):  
Fangkun Ning ◽  
Weitao Jia ◽  
Jian Hou ◽  
Xingrui Chen ◽  
Qichi Le
Keyword(s):  
Magnesium Alloy ◽  
Hot Rolling ◽  
Az31 Magnesium Alloy ◽  
Model Based ◽  
Rolling Experiment ◽  
Edge Cracks ◽  
Experiment And Simulation

SUPERPLASTIC FORMABILITY OF AZ31 MAGNESIUM ALLOY SHEETS PRODUCED BY TWIN ROLL CASTING AND SEQUENTIAL HOT ROLLING

2013 ◽  
Vol 27 (19) ◽  
pp. 1341020
Author(s):  
YANDONG YU ◽  
KAI LIN ◽  
PENG JIANG
Keyword(s):  
Magnesium Alloy ◽  
Magnesium Alloys ◽  
Hot Rolling ◽  
Tensile Testing ◽  
Az31 Magnesium Alloy ◽  
Twin Roll Casting ◽  
Roll Casting ◽  
Three Stages ◽  
The Common ◽  
Twin Roll

In this paper, superplastic tensile testing and gas bulging forming of AZ31 and AZ31 + Y + Sr magnesium alloys produced by twin roll casting (TRC) and sequential hot rolling were carried out. At 673 K, the superplastic formability of the TRC AZ31 magnesium alloy sheets added Y and Sr elements has improved significantly compared to the common TRC AZ31 sheets. Formations of cavities on the bulging part go through three stages of the nucleation, growth and aggregation, finally cavities merging lead to rupture at the top of the bulging part.

Hot Rolling of AZ31 Magnesium Alloy to Sheet Gauge

2006 ◽  
Author(s):  
Elhachmi Essadiqi ◽  
Claude Galvani ◽  
Javaid Amjad ◽  
Guowu Shen ◽  
Kevin Spencer ◽  
...  
Keyword(s):  
Magnesium Alloy ◽  
Hot Rolling ◽  
Az31 Magnesium Alloy

Texture and Mechanical Properties of AZ31 Magnesium Alloy Sheets Processed by Symmetric/Asymmetric Combination Hot-Rolling

2010 ◽  
Vol 654-656 ◽  
pp. 719-722 ◽  
Author(s):  
J. Horiuchi ◽  
Hirofumi Inoue ◽  
Takayuki Takasugi
Keyword(s):  
Magnesium Alloy ◽  
Yield Strength ◽  
Hot Rolling ◽  
High Strength ◽  
Alloy Sheet ◽  
Az31 Magnesium Alloy ◽  
High Yield ◽  
Rolled Sheet ◽  
Asymmetric Rolling ◽  
Double Peaks

Conventional symmetric rolling enhances yield strength by forming basal texture, while asymmetric rolling can improve formability by inclining the c-axis of hcp crystal. In this study, the combination rolling consisting of symmetric and asymmetric hot rolling has been performed to simultaneously improve formability and maintain high strength of AZ31 magnesium alloy sheet. The symmetrically/asymmetrically combination hot-rolled and annealed sheet exhibits a broadened texture having double peaks with tilt angles of 0º and 40º from ND toward RD with respect to the c-axis. Correspondingly, this sheet shows relatively high yield strength of 123 MPa and large elongation of 24.7%. As for cup drawing test, the conventional warm-rolled sheet is barely formed at 175 °C, but the symmetrically/asymmetrically combination rolled sheet can be formed at temperature as low as 75 °C. These results indicate that the symmetric/asymmetric combination hot-rolling leads to a unique texture with good balance of formability and strength.

Effect of Sn Addition on Corrosion Properties of As-Cast and Hot-Rolled AZ31 Magnesium Alloys

2017 ◽  
Vol 750 ◽  
pp. 124-128
Author(s):  
Yunus Turen ◽  
Didem Güzel ◽  
Huseyin Zengin ◽  
Yavuz Sun ◽  
Hayrettin Ahlatci
Keyword(s):  
Corrosion Resistance ◽  
Magnesium Alloy ◽  
Hot Rolling ◽  
Rolling Process ◽  
Az31 Magnesium Alloy ◽  
Corrosion Properties ◽  
Electric Resistance Furnace ◽  
Hot Rolling Process ◽  
Working Solution ◽  
Hot Rolled

In this study, the effect of Sn addition on corrosion resistance of as-cast and hot rolled AZ31 magnesium alloy was investigated. Sn additions were made by 0.2 wt%, 0.5 wt% and 1 wt%. An electric resistance furnace was used to produce alloys. Hot rolling process was performed at 350 °C by 40% thickness reduction at one rolling pass. Microstructure characterizations were performed by optical (OM) and scanning electron microscope (SEM). Immersion tests and electrochemical analyses were performed to investigate the corrosion resistance of the alloys. A 3.5% NaCl working solution at room temperature was used in both corrosion tests. The results showed that Sn addition decreased the primary dentrite size and restricted the growth of secondary dentritic arm. The as-cast structures transformed to dynamically recrystallized grain structures after hot-rolling process in all the alloys. Corrosion resistance of AZ31 magnesium alloy tended to decrease with Sn addition. This decrease was more clear in homogenized and hot-rolled states while there were some flactuations in as-cast states.

MICROSTRUCTURE AND MECHANICAL PROPERTIES OF AZ31 MAGNESIUM ALLOY SHEET BY HOT ROLLING

2009 ◽  
Vol 23 (06n07) ◽  
pp. 984-989 ◽  
Author(s):  
QING MIAO ◽  
LIANXI HU ◽  
ERDE WANG ◽  
SHUJIN LIANG ◽  
HONGYING CHAO
Keyword(s):  
Mechanical Properties ◽  
Grain Size ◽  
Magnesium Alloy ◽  
Hot Rolling ◽  
Tensile Elongation ◽  
Rolling Direction ◽  
Alloy Sheet ◽  
Az31 Magnesium Alloy ◽  
Microstructure And Mechanical Properties ◽  
Roll Temperature

AZ31 magnesium alloy sheets with a thickness of about 2mm were prepared by using a unique hot rolling process which was featured by heating the rolls during rolling. Two different rolling routes were used to achieve the final thickness through 6 passes of rolling. The major rolling parameters were chosen as the same for both rolling routes except that the roll temperature was set to be 400°C for route A and the 1st to 4th passes of route B, but lowered to 350°C for the 5th and 6th passes of route B. The microstructure and mechanical properties of the alloy sheets were comparatively investigated. The results showed that dynamic recrystallization occurred during hot rolling, and by choosing the processing parameters appropriately the grain size could be refined steadily with increasing rolling passes. The final alloy sheet prepared by 6 passes of rolling via the rolling route B was featured by a very fine microstructure, with the grain size being 5μm in average. Correspondingly, it presented very high strength and tensile elongation, with its yield strength and tensile elongation achieving 206MPa and 26.4% in the transverse, and 196MPa and 27.6% in the rolling direction, respectively.

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