Solid state recycling of pure Mg and AZ31 Mg machining chips via spark plasma sintering

被引：41
作者：
Paraskevas, Dimos [1 ]
Dadbakhsh, Sasan [1 ]
Vleugels, Jef [2 ]
Vanmeensel, Kim [2 ]
Dewulf, Wim [1 ]
Duflou, Joost R. [1 ]
机构：
[1] Katholieke Univ Leuven, Dept Mech Engn, Celestijnenlaan 300A, B-3001 Heverlee, Belgium
[2] Katholieke Univ Leuven, Dept Mat Engn MTM, Kasteelpk Arenberg 44, B-3001 Heverlee, Belgium
来源：
MATERIALS & DESIGN | 2016年 / 109卷
关键词：
Spark plasma sintering; Solid state recycling; Diffusion bonding; Magnesium alloys; Grain refinement; Machining chips; TEMPERATURE MECHANICAL-PROPERTIES; MAGNESIUM ALLOY; MG-10GD-2Y-0.5ZR ALLOY; GRAIN-REFINEMENT; EXTRUSION RATIO; PUNCH TEST; BEHAVIOR; MICROSTRUCTURE; ALUMINUM; FLOW;
D O I：
10.1016/j.matdes.2016.07.082
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
This work investigates the applicability of spark plasma sintering (SPS) as a solid state recycling technique for magnesium alloy scrap. In this respect, machining chips from pure Mg and AZ31 Mg alloy ingots are chemically cleaned, cold compacted and SPSed directly into bulk specimens. It is found that SPS can successfully establish full densification and effective metallurgical bonding between chips without altering compositional constituents. This is attributed to the dynamic compaction during sintering as well as to the disruption of the chips' surface oxide film due to SPS electric current based joule heating. Apart from the successful consolidation, microstructural analysis of the initial Mg ingots, chips and SPS recycled material reveals that the SPS microstructure was finer than that of the original ingots due to significant deformation induced grain refinement during machining. As a result, the recycled materials had a higher compression and shear strength than that of the starting ingot material. The findings indicate that SPS is an effective alternative method for solid state recycling of magnesium alloy scrap. (C) 2016 Elsevier Ltd. All rights reserved.
引用
收藏
页码：520 / 529
页数：10
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