Microstructure formation mechanism during a novel semisolid rheo-rolling process of AZ91 magnesium alloy

Zhao, Zhihao; Guan, Renguo; Wang, Xiang; Liu, Chunming

doi:10.1007/s40195-012-0261-7

Cited by 10 publications

(5 citation statements)

References 20 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Magnesium alloys have been utilized in automobile, aircraft and electronics industries due to their low density, high specific strength and damping characteristic [1][2][3][4][5][6][7]. However, the high chemical activity in aggressive environments is one of the major obstacles for the wide use of magnesium alloys [8][9][10].…”

Section: Introductionmentioning

confidence: 99%

Corrosion Resistance of Silane-Modified Hydroxide Zinc Carbonate Film on AZ31 Magnesium Alloy

Zeng

Liu

Pang

et al. 2015

Acta Metall. Sin. (Engl. Lett.)

View full text Add to dashboard Cite

The corrosion resistance of magnesium alloys can be improved using functional surface modification such as hydrophobic treatment. In this study, a hierarchical hydroxide zinc carbonate (HZC) film was fabricated on AZ31 magnesium alloy via a simple chemical-bath deposition process using urea aqueous solution. The morphologies, compositions and corrosion resistance of the hydrophobic film were analyzed using scanning electron microscopy, X-ray diffraction and Fourier transform infrared spectrometer, and electrochemical measurements as well. The results revealed that the HZC film displayed flower-like protrusions and had a thickness of approximately 100 lm. The fluoroalkylsilane (FAS)-modified HZC film exhibited a hydrophobic property with a water contact angle of 131.3°. The FAS/HZC film significantly improved the corrosion resistance of the AZ31 alloy due to hierarchical structures and hydrophobic modification.

show abstract

Section: Introductionmentioning

confidence: 99%

Corrosion Resistance of Silane-Modified Hydroxide Zinc Carbonate Film on AZ31 Magnesium Alloy

Zeng

Liu

Pang

et al. 2015

Acta Metall. Sin. (Engl. Lett.)

View full text Add to dashboard Cite

show abstract

“…Reisi et al 16 believed that the stable growth of the primary particles can be maintained in the secondary solidification stage. Guan et al 17,18 studied the solidification behavior of the remaining liquid of AZ31 alloy and AZ91 alloy, and found that the residual liquid was affected obviously by the temperature of the process. Chen et al 19 investigated the secondary solidification behavior of AA8006 alloy, and found that the cooling rate influenced not only the primary α-Al dendrite, but also the secondary solidification process.…”

Section: Introductionmentioning

confidence: 99%

Effects of Pouring Temperature on Microstructure and Mechanical Properties of the A356 Aluminum Alloy Diecastings

Zhou

2020

Mat. Res.

View full text Add to dashboard Cite

Diecastings of the A356 aluminum alloy were produced by rheo-diecasting (RDC) and High pressure die casting (HPDC), the microstructures of primary solidification, secondary solidification and eutectic Si of diecastings with different pouring temperature were explored and the mechanical properties of different parameters were tested. The result shows that the primary α-Al grains in RDC with self-inoculation method (SIM) are smaller and rounder than the dendrite structure in HPDC. During the RDC process, the amount of primary α-Al grains, average grain size and the lamellar spacing of the eutectic Si increase with the decrease of the melt treatment temperature. While the average grain size and the shape factor are gradually increasing with the increase of melt treatment temperature. As a result, RDC can significantly improve the mechanical properties of the A356 aluminum alloy compared with HPDC, the mechanical properties are optimal at 600°Cwith the tensile strength and elongation are 268.67MPa and 6.8%, respectively.

show abstract

“…The process of slurry preparation (solid particles precipitate from liquid alloy) is called primary solidification, and the solidification process of slurry in the subsequent forming (solidification of remaining liquid) is called secondary solidification. In recent years, the study of semisolid metal rheological forming mainly focused on primary solidification, while the research of secondary solidification was not too much [12][13][14][15][16] . While the studies have indicated that the solidification of remaining liquid in semisolid slurry has an important influence on the final solidification microstructures and mechanical properties of alloy.…”

Section: Introductionmentioning

confidence: 99%

Effects of Forming Processes on Microstructures and Mechanical Properties of A356 Aluminum Alloy Prepared by Self-inoculation Method

Yang

et al. 2019

Mat. Res.

View full text Add to dashboard Cite

Semisolid slurry of A356 aluminum alloy was prepared by Self-Inoculation Method (SIM), and the microstructures and solidification behavior of rheo-forming process in different forming processes were researched. The results indicate that semisolid slurry of A356 aluminum alloy can be prepared by Self-Inoculation Method at 600ºC. Primary α-Al particles with fine and spherical morphology are uniformly distributed when the isothermal holding time of slurry is 3 min. The different forming processes for semisolid rheo-forming can be regarded as the effect of cooling rate on rheo-forming. The primary particle sizes and shape factors are gradually increasing with the increase of cooling rate. The sizes of secondary particles are gradually increasing with the decrease of cooling rate, and the amount of secondary particles in the same areas are gradually decreasing with the decrease of cooling rate. The morphologies of eutectic Si are gradually coarsening from fibrous to needle-like in different forming processes, while the sizes and the lamellar spacing of the eutectic Si are gradually increasing with the decrease of cooling rate. The mechanical properties of the semisolid forming components are gradually increasing with the increase of cooling rate and forming pressure.

show abstract

Microstructure formation mechanism during a novel semisolid rheo-rolling process of AZ91 magnesium alloy

Cited by 10 publications

References 20 publications

Corrosion Resistance of Silane-Modified Hydroxide Zinc Carbonate Film on AZ31 Magnesium Alloy

Corrosion Resistance of Silane-Modified Hydroxide Zinc Carbonate Film on AZ31 Magnesium Alloy

Effects of Pouring Temperature on Microstructure and Mechanical Properties of the A356 Aluminum Alloy Diecastings

Effects of Forming Processes on Microstructures and Mechanical Properties of A356 Aluminum Alloy Prepared by Self-inoculation Method

Contact Info

Product

Resources

About