Journal
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
Volume 492, Issue 1-2, Pages 317-326Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.msea.2008.03.035
Keywords
twin roll casting; warm rolling; grain refinement; AZ41M alloy sheet; mechanical property
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Funding
- Korean Ministry of Commerce, Industry and Energy [10020072]
- Korea Institute of Materials Science and China Scholarship Council [[2007] 3020]
- Korea Institute of Industrial Technology(KITECH) [10020072] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
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Microstructure and mechanical properties of Mg-4.5Al-1.0Zn (designated as AZ41 M in short) alloy sheets produced by twin roll casting, sequential warm rolling and post annealing at 350 degrees C were studied in this paper. Microstructure of twin roll casting strip consisted of dendrite structure, eutectics and intermetallic Compounds located in the interdendritic region. AZ41 M alloy sheets showed higher strength and lower elongation after sequential warm rolling, while post annealing after warm rolling induced the decrease of strength and increase of elongation. This results in the balance of strength and elongation in AZ41 M alloy sheets. The grain refinement during manufacturing Processes was attributed to the formation of heavy shear bands, high dislocation density, twinning, and precipitates of Al2Ca/Mg2Ca or Al8Mn5 and the Ca dissolution into Mg17Al12 phase. (C) 2008 Elsevier B.V. All rights reserved.
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