Effects of Long-Period Stacking-Order Phase on the Corrosion Behavior of an Mg-Gd-Y-Zn-Zr Alloy
Abstract This paper investigated the role of long-period stacking-order (LPSO) structure on the corrosion behavior of an Mg-Gd-Y-Zn-Zr alloy. The amounts of the LPSO phase were tailored by heat treatment. The as-received sample contained a small amount of lamellar LPSO phase and $ Mg_{5} $(Gd, Y) particles. The lamellar LPSO was dissolved into the Mg matrix by solution treatment and precipitated at a low cooling rate. Consequently, the sample cooled in a furnace contained large amounts of LPSO phase (furnace-cooled sample). However, almost no LPSO was detected in the sample when cooled into water (water-cooled sample). Corrosion tests indicated that the LPSO phase deteriorated the corrosion properties of Mg alloy. Surface morphology for samples after immersion in 3.5 wt.% NaCl solution implied that galvanic corrosion was predominant for the Mg-Gd-Y-Zn-Zr alloy. The LPSO phase with a low potential was preferentially corroded compared with the Mg matrix, and therefore, a poor corrosion resistance of the Mg alloy containing the LPSO phase..
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Erscheinungsjahr: |
2022 |
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Erschienen: |
2022 |
Enthalten in: |
Zur Gesamtaufnahme - volume:32 |
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Enthalten in: |
Journal of materials engineering and performance - 32(2022), 16 vom: 09. Nov., Seite 7311-7321 |
Sprache: |
Englisch |
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Beteiligte Personen: |
Du, Wei [VerfasserIn] |
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Volltext [lizenzpflichtig] |
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© ASM International 2022. Springer Nature or its licensor (e.g. a society or other partner) holds exclusive rights to this article under a publishing agreement with the author(s) or other rightsholder(s); author self-archiving of the accepted manuscript version of this article is solely governed by the terms of such publishing agreement and applicable law. |
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doi: |
10.1007/s11665-022-07623-5 |
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funding: |
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PPN (Katalog-ID): |
OLC2144923353 |
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520 | |a Abstract This paper investigated the role of long-period stacking-order (LPSO) structure on the corrosion behavior of an Mg-Gd-Y-Zn-Zr alloy. The amounts of the LPSO phase were tailored by heat treatment. The as-received sample contained a small amount of lamellar LPSO phase and $ Mg_{5} $(Gd, Y) particles. The lamellar LPSO was dissolved into the Mg matrix by solution treatment and precipitated at a low cooling rate. Consequently, the sample cooled in a furnace contained large amounts of LPSO phase (furnace-cooled sample). However, almost no LPSO was detected in the sample when cooled into water (water-cooled sample). Corrosion tests indicated that the LPSO phase deteriorated the corrosion properties of Mg alloy. Surface morphology for samples after immersion in 3.5 wt.% NaCl solution implied that galvanic corrosion was predominant for the Mg-Gd-Y-Zn-Zr alloy. The LPSO phase with a low potential was preferentially corroded compared with the Mg matrix, and therefore, a poor corrosion resistance of the Mg alloy containing the LPSO phase. | ||
650 | 4 | |a corrosion behavior | |
650 | 4 | |a LPSO | |
650 | 4 | |a Mg alloy | |
650 | 4 | |a microstructure | |
700 | 1 | |a Du, Yuzhou |0 (orcid)0000-0003-0714-2442 |4 aut | |
700 | 1 | |a Yang, Zhenlei |4 aut | |
700 | 1 | |a Ma, Bo |4 aut | |
700 | 1 | |a Ge, Yanfeng |4 aut | |
700 | 1 | |a Jiang, Bailing |4 aut | |
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