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OALib Journal期刊
ISSN: 2333-9721
费用：99美元
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AZ91Mg-Al合金中γ-Mg17Al12析出相的多重位向关系及{112}γ伪孪晶关系
, PP. 709-714
Keywords: Mg-Al合金,γ-Mg17Al12析出相
Abstract:
应用透射电镜(TEM)研究了时效AZ91Mg-Al合金中三种形态的γ-Mg17Al12析出相(bcc)的多重位向关系及析出相颗粒间的{112}γ伪孪晶关系.这三种板条状、六棱柱状或短棒状的析出相分别与Mg基体(hcp)保持Burgers,Crawley和Porter位向关系;在同种析出相颗粒之间或异种颗粒之间能形成不具有孪晶结构特征的{112}γ伪孪晶关系.从晶体学角度解释了这种多重位向关系及伪孪晶的生成机制.并从单个析出相与基体间的匹配程度解释了这三种析出相的析出密度存在较大差别的原因.
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