NDLI: Recycling of AZ40 Magnesium Alloy Scraps by Hydriding-Dehydriding and Subsequent Consolidation Processing

Content Provider	Springer Nature Link
Author	Haiping, Zhou Lianxi, Hu Yu, Sun Heng, Wang
Copyright Year	2015
Abstract	The hydriding-dehydriding process was used to recycle AZ40 magnesium (Mg) alloy scraps, and the microstructure nanocrystallization was realized. X-ray diffraction analysis, scanning electron microscopy, and transmission electron microscopy were carried out to characterize the microstructure. After mechanically milling in hydrogen for 72 h, matrix Mg was completely turned into nanocrystalline MgH$_{2}$, with an average crystallite size of about 10 nm. And then, the MgH$_{2}$ phase was completely transformed into Mg again through vacuum dehydriding treatment at 300 °C for 192 min, with an average crystallite size of about 20 nm. In addition, the nanocrystalline alloy powders were hot-pressed and extruded into bars. The average grain size of the bars was about 500 nm, which had reached the size of ultrafine-grain. Meanwhile, the yield strength and ultimate tensile strength of the as-extruded bars reached about 312 and 497 MPa, respectively. The results indicate that hydriding-dehydriding process is a feasible method for recycling of Mg alloy scraps, and it is expected to have a good application prospect in preparing ultrafine-grain Mg alloys.
Starting Page	3666
Ending Page	3672
Page Count	7
File Format	PDF
ISSN	10599495
Journal	Journal of Materials Engineering and Performance
Volume Number	24
Issue Number	9
e-ISSN	15441024
Language	English
Publisher	Springer US
Publisher Date	2015-08-06
Publisher Place	New York
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	hydriding-dehydriding mechanical properties nanocrystalline recycling of Mg alloy scraps Characterization and Evaluation of Materials Tribology, Corrosion and Coatings Quality Control, Reliability, Safety and Risk Engineering Design
Content Type	Text
Resource Type	Article
Subject	Mechanics of Materials Materials Science Mechanical Engineering

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