Effect of Si content on microstructures, tensile properties, and creep properties in a cast Mg-6Al-0.4Mn-2Ca (wt.%) alloy

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING

卷:776

Article

Nakata, T.¹  Xu, C.¹  Sakai, T.²  Miyamoto, T.²  Liao, J.²  Kamado, S.¹ 

[1] Nagaoka Univ Technol, 1603-1 Kamitomioka, Nagaoka, Niigata 9402188, Japan

[2] KURIMOTO LTD, Suminoe Ku, 8-45,Shibatani 2 Chome, Osaka 5590021, Japan

关键词: Mg-Al-Mn-Ca alloy;    Gravity-cast;    Tensile property;    Creep property;    Dynamic precipitation;   

DOI  :  10.1016/j.msea.2020.139018

来源: Elsevier

【 摘 要 】

Effect of Si content on microstructures, tensile properties, and creep properties in a gravity-cast Mg-6Al-0.4Mn-2Ca (wt.%, AMX6042) alloy has been investigated. High content of Si addition increases the ductility of the AMX6042 alloy without large loss of strengths; however, addition of Si over 0.6 wt.% decreases fraction of (Mg,Al)(2)Ca phases significantly. Moreover, such high content of Si promotes formation of Mg17Al12 phases, leading to poor creep properties. Although addition of Si tends to decrease fraction of (Mg,Al)(2)Ca phases and promote formation of Mg17Al12 phases, good creep properties could be kept up to 0.47 wt.% Si addition.

【 授权许可】

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