Journal
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
Volume 625, Issue -, Pages 369-373Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.msea.2014.12.011
Keywords
Magnesium alloy; Extrusion; Artificial cooling; Tensile strength; Precipitation
Categories
Funding
- World Premier Materials Program - Korean Ministry of Knowledge Economy [10037928]
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An Mg-7Sn-1Al-1Zn alloy known to have excellent extrudability and superior strength was subjected to artificial cooling during indirect extrusion by directly spraying water onto the extruded rod at the die exit. The results obtained revealed that this artificial cooling dramatically reduces the temperature of the deformation zone during extrusion, thereby creating a finer grain size, an intensified texture and a greater amount of precipitates when compared to extrusion without artificial cooling. The yield and tensile strength of the extruded alloy is also significantly improved, which is attributed to the effects of grain refinement in combination with an enhanced texture and precipitate hardening. (C) 2014 Elsevier B.V. All rights reserved.
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