Microstructure Change of AZCa912 Magnesium Alloy Continuous Casting Bar by Hot Compression

Akira Watazu; Naoki Omura; Kenji Miwa; Naobumi Saito

doi:10.4028/www.scientific.net/MSF.783-786.521

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HomeMaterials Science ForumMaterials Science Forum Vols. 783-786Microstructure Change of AZCa912 Magnesium Alloy...

Microstructure Change of AZCa912 Magnesium Alloy Continuous Casting Bar by Hot Compression

Abstract:

AZCa912, 8.8mass%Al-0.68mass%Zn-0.25mass%Mn-1.9mass%Ca-Bal.Mg, continuous casting bars were formed and their hot compression properties were measured. AZCa912 alloy is a noncombustible magnesium alloy. AZCa912 bars 50 mm in diameter were formed by a direct chill continuous casting method. The surfaces of the bars had excellent metallic luster. Grain sizes in the bars were 148, and the dendrite arm spacing was 16.9 μm. Cracks on the side surfaces of the samples were formed by compression at 250-300°C, 0.01-1/s and 350°C, 1/s. However, inner cracks were not observed and-5 μm fine-grains were formed. Some samples had an unchanged casting structure after hot pressing, and the percent of the structure remaining unchanged decreased with low-temperature compression.

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Periodical:

Materials Science Forum (Volumes 783-786)

Pages:

521-526

DOI:

https://doi.org/10.4028/www.scientific.net/MSF.783-786.521

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Online since:

May 2014

Authors:

Akira Watazu*, Naoki Omura, Kenji Miwa, Naobumi Saito

Keywords:

AZCa912, Continuous Casting, Hot Compression, Magnesium Alloy, Microstructure

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