检索结果-南通市图书馆

Grain size-dependent mg/si ratio effect on the microstructure and mechanical/electrical properties of al-mg-si-sc alloys

引用

Journal of Materials science & Technology 2019年第7期35卷 1354-1363页

作者： Shengyu Jiang Ruihong Wang school of Materials science and Engineering Xi’an University of Technology

al-mg-si-sc alloys with different mg/si ratio(1.73 in wt.%) and different grain size(coarse grains vs ultrafine grains) were prepared, which allowed to investigate the grain size-dependent mg/si ratio effect on the microstructural evolution and concomitantly on the hardness and electrical conductivity when subjected to aging at 200℃. In the coarse-grained al-mg-sc-sc alloys, the β" precipitation within the grain interior and also the precipitation hardening were highly dependent on the mg/si ratio,while the electrical conductivity was slightly affected by the mg/si ratio. A promoted β" precipitation was found in the case of si excess(mg/si ratio mg excess(mg/si ratio>1.73). While in the ultrafine-grained al-mg-si-sc alloys, the electrical conductivity rather than the hardness was more sensitive to the mg/si ratio. The alloy with si excess displayed electrical conductivity much higher than its counterpart with mg excess. This is rationalized by the grain boundary precipitation promoted by si, which reduced the solute atoms and precipitates within the grain interior. Age softening was found in the ultrafine-grained alloy with si excess, but the ultrafine-grained alloy with mg excess held the hardness almost unchanged during the aging. The hardness-conductivity correlation is comprehensively discussed by considering the coupling effect of mg/si ratio and grain size. A strategy to simultaneously increase the hardness/strength and electrical conductivity is proposed for the al-mg-sisc alloys, based on present understanding of the predominant factors on strengthening and conductivity,respectively.

关键词： al-mg-si-sc Grain size effect mg/si ratio Precipitation Hardness/conductivity

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：