Abstract
In this paper, nanocrystalline (nc) AZ91 magnesium alloy bulks, with average grain sizes of ∼15 nm, were processed via the combined processing of hydrogenation-disproportionation-desorption-recombination (HDDR), spark plasma sintering (SPS) and hot extrusion. The effects of different sintering temperatures and holding times on the sintering properties of magnesium alloy were analyzed and the optimum SPS sintering process parameters of nanocrystalline AZ91 powder were determined. The tensile strength of nc AZ91 magnesium alloy rods is up to 267 MPa at room temperature. Meanwhile, when the grain size is less than 20 nm the particular mechanical behavior of nc magnesium alloy emerged, which implies an inverse Hall-Petch relationship.
| Original language | English |
|---|---|
| Article number | 153253 |
| Journal | Journal of Alloys and Compounds |
| Volume | 819 |
| DOIs | |
| Publication status | Published - 5 Apr 2020 |
Bibliographical note
Publisher Copyright:© 2019 Elsevier B.V.
Keywords
- Grain refining
- Mechanical properties
- Nanocrystalline magnesium alloy
ASJC Scopus subject areas
- Mechanics of Materials
- Mechanical Engineering
- Metals and Alloys
- Materials Chemistry
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