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説明:

To develop a strong, room-temperature (RT)-formable, and corrosion-resistant Mg alloy sheet, we investigate the age-hardening response, RT formability, tensile properties, and corrosion resistance of low-Mn-containing Mg-(1, 2)Zn-(0.2, 0.5, 1)Ca-0.2Al-0.2Mn (ZXAM, mass%) alloy sheets. The Zn content minimally affects the abovementioned properties. However, the Ca content is important for significantly improving the properties. The addition of ≥ 0.5mass%Ca enhances the RT formability by inclining the (0001) poles toward the transverse direction. Dense corrosion products are formed on the surface of the ≥ 0.5mass%Ca-containing ZXAM alloy sheets, resulting in improved corrosion resistance. Moreover, the aged ≥ 0.5mass%Ca-containing ZXAM alloy sheets exhibit high strength along the rolling direction (RD), in which the 0.2 % proof strength (PS) exceeds 200 MPa. Aging-treatment reduces the corrosion resistance slightly, although the corrosion rates are lower compared with those of commercial wrought Mg alloys. Thereafter, a Mg-2Zn-0.5Ca-0.2Al-0.2Mn alloy sheet simultaneously achieves an excellent combination of strength, RT formability, and corrosion resistance via age-hardening. The PS along the RD and the Index Erichsen value of the sheet reached 213 MPa and 8.7 mm, respectively, and its corrosion rate after immersion in 3.5mass%NaCl solution for 3 days is 3.0 mm･y−1.

権利情報:

• Creative Commons BY Attribution 4.0 International
  

キーワード: Mg-Zn-Ca-Al-Mn alloy, Rolling, Age-hardening, Tensile property, Corrosion resistance

刊行年月日: 2025-04-21

出版者: Elsevier BV

掲載誌:

• Journal of Alloys and Compounds (ISSN: 09258388) vol. 1027 180504

研究助成金:

• Light Metal Educational Foundation
• Japan Society for the Promotion of Science JP22H00259
• Japan Society for the Promotion of Science JP24K01213
• Japan Society for the Promotion of Science JP23K17833

原稿種別: 出版者版 (Version of record)

MDR DOI:

公開URL: https://doi.org/10.1016/j.jallcom.2025.180504

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更新時刻: 2026-01-05 14:28:29 +0900

MDRでの公開時刻: 2026-01-05 16:20:03 +0900