检索结果-南通市图书馆

Effects of Heat Treatments on Microstructures and Precipitation Behaviour of Mg_(94)Y_4Zn_2 Extruded Alloy

Journal of Materials Science & Technology 2014年第2期30卷 128-133页

作者： Huan Liu Feng Xue Jing Bai Jian Zhou Yangshan Sun School of Materials Science and Engineering Jiangsu Key Lab for Advanced Metallic MaterialsSoutheast University

Microstructures and precipitation behaviours of Mg94Y4Zn2 （at. %） extruded alloy during solution treatment and ageing processes were investigated. Three major phases were observed in the as-cast Ug94Zn2Y4 alloy：α-Mg, block shaped 1 8R long period stacking ordered （LPSO） phase and Mg24Y5 cuboid particles. After homogenization and extrusion, the block shaped LPSO phase changed into plate-like shape aligned along the direction of extrusion. During solution treatment, a small fraction of LPSO phase was transformed from 18R structure to 14H type. The nano-scale β＇ phase with its close-packed planes being perpendicular to the direction of both α-Mg and LPSO structure was precipitated at ageing stage. The coexistence of β＇ and LPSO phase contributes to the strengthening of the alloy, with microhardness for the matrix and LPSO structures reaching 145.8 and 155,0 HV, respectively.

关键词： Heat treatment Microstructure Precipitation behaviour Mg94Y4Zn2 alloy long period stacking ordered structure

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

Refining 18R-LPSO phase into sub-micron range by pre-kinking design and its prominent strengthening effect on Mg_(97)Y_(2)Zn_(1) alloy

引用

Journal of Materials Science & Technology 2024年第9期176卷 13-24页

作者： Chao Sun Huan Liu Ziyue Xu Yuna Wu Kai Yan Jia Ju Jinghua Jiang Feng Xue Jing Bai Yunchang Xin College of Mechanics and Materials Hohai UniversityNanjing 210000China College of Materials Science and Engineering Southeast UniversityNanjing 211189China Jiangsu Key Laboratory for Light Metal Alloys Nanjing Yunhai Special Metals Co.Ltd.Nanjing 211200China College of Mechanical Engineering Yangzhou UniversityYangzhou 225127China Jiangsu Key Laboratory of Advanced Structural Materials and Application Technology Nanjing Institute of TechnologyNanjing 211167China Key Laboratory for Light-weight Materials Nanjing Tech UniversityNanjing 210009China

In this study,a composite deformation strategy of pre-kinking(equal channel angular pressing(ECAP))followed by large-ratio hot extrusion(HE)was designed to refine the 18R long period stacking ordered(LPSO)phase into sub-micron range in a Mg_(97)Y_(2)Zn_(1)(at.%)*** the composite processing,the mechanical properties of the alloy are significantly enhanced,superior to the majority of reported Mg_(97)Y_(2)Zn_(1) and other LPSO-containing Mg *** the composite deformed alloys,the 16P-HE alloy exhibits the best mechanical properties with tensile yield strength(TYS)of 475 MPa,ultimate tensile strength(UTS)of 526 MPa,and fracture elongation(FE)of 14.5%.Quantitative analysis of 18R phase indicates that increasing ECAP pass from 1 to 16 gradually decreases the average size of 18R phase from 5.1μm to 2.3μ*** HE,the 18R phase is further refined with a corresponding decrease in the average size in the descending order of 1P-HE(4.3μm),4P-HE(3.2μm),and 16P-HE(1.4μm)*** of the strengthening contributions confirms that the superior mechanical properties of 16P-HE alloy are mainly due to its strongest interface strengthening(145 MPa)and grain boundary strengthening(189 MPa)from the sub-micron 18R phase andα-Mg ***,the strengthening effect of 18R phase decreases gradually with their morphology changing from particles to fibers,and to *** obtained results further deepen and broaden the strengthening-toughening theory of 18R phase.

关键词： Magnesium alloys long period stacking ordered structure Plastic deformation Refinement Mechanical property

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

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

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

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：