王赛香,张大童,张文,邱诚

• 1:华南理工大学国家金属材料近净成形工程技术研究中心

摘要(Abstract)：

对热轧MB8(Mg-1.5Mn-0.3Ce)镁合金板材的超塑性进行了研究。高温拉伸实验结果表明,合金在573～723 K及2×10-2～4×10-4s-1应变速率范围内具有良好的超塑性,在673 K及4×10-4s-1条件下得到最大断裂伸长率为441.6%;在723 K时最高应变速率敏感系数m为0.42,此时流变应力仅为6.3 MPa。此外,采用SEM对拉伸试样断口形貌进行了观察,并通过断裂区域显微组织的观察分析了Mg-1.5Mn-0.3Ce镁合金超塑性变形的机制。

关键词(KeyWords)： MB8镁合金;超塑性;应变速率;变形机制

Abstract:

Keywords:

基金项目(Foundation): 广州市科技支撑计划资助项目(2009Z2-D811);; 中央高校基本科研业务费专项资金资助(2009ZM0264)

作者(Author): 王赛香,张大童,张文,邱诚

DOI: 10.13289/j.issn.1009-6264.2012.09.017

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