检索结果-南通市图书馆

Manipulating internal flow units toward favorable plasticity in Zr-based bulk-metallic glasses by hydrogenation

Journal of Materials Science & Technology 2022年第7期102卷 36-45页

作者： Fuyu Dong Yuexin Chu Mengyuan He Yue Zhang Weidong Li Peter K.Liaw Binbin Wang Liangshun Luo Yanqing Su Robert O.Ritchie Xiaoguang Yuan School of Materials Science and Engineering Shenyang University of TechnologyShenyangChina School of Materials Science and Engineering Northeastern UniversityShenyangChina Department of Materials Science and Engineering The University of TennesseeKnoxvilleTNUSA School of Materials Science and Engineering Harbin Institute of TechnologyHarbinChina Department of Materials Science and Engineering University of CaliforniaBerkeleyCA94720USA

This work intends to manipulate the internal flow units in Zr_(55)Cu_(30)Ni_(5)Al_(10)bulk-metallic glasses(BMGs)through plasma-assisted hydrogenation to generate a positive microalloying effect on *** on the cooperative shear model theory,serration-flow statistics during nanoindentation loading and creep tests during the holding stage were used to analyze the influence of hydrogen on the behavior of flow units in *** observations showed that the hydrogen in the Zr_(55)Cu_(30)Ni_(5)Al_(10)BMGs caused mechanical softening,plasticity improvement,and structural *** also showed that the average volume,size,and activation energy of internal flow units in the BMGs all increased as a result of the increase in the hydrogen *** hydrogenation in the BMGs was found to lead to a prolifera-tion of shear bands,which promoted *** aggregation of these internal flow units reduced the stress required for plastic deformation through shear bands,ultimately causing softening and structural relaxation.

关键词： Bulk-metallic glass Plasma-assisted hydrogenation Nanoindentation Internal flow unit serrations Nano-scale creep

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

The Ananthakrishna Model Under Non-synchronous Perturbation

引用

Acta Mathematicae Applicatae Sinica 2024年第4期40卷 1078-1097页

作者： Yi-wen TAO Sue Ann CAMPBELL Jing-li REN School of Mathematics and Statistics Zhengzhou UniversityZhengzhou 450001China Department of Applied Mathematics University of WaterlooWaterloo N2L3G1Canada

The Ananthakrishna model,seeking to explain the Portevin-Le Chatelier effect,is studied with or without non-synchronous *** the unperturbed model,Bogdanov-Takens bifurcation and zeroHopf bifurcation are *** the perturbed model,rich dynamical behaviors are given by researching the Poincarémap,including solutions of different periods,quasi-periodic solutions,chaotic solutions,and ***,an augmented temperature-dependent perturbation amplitude induces a transition from non-serrated to serrated flow on the stress-time ***,on the stress-strain curve,the phenomenon of repeated yielding diminishes with an increase in the value of a temperature-dependent parameter,while it persists with an increase in the value of a temperature-independent *** analysis sheds light on the factors exerting the most significant influence on dislocation density.

关键词： Ananthakrishna model serrations non-synchronous perturbation attractor bifurcation

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

Serrated flow behavior of GH536 superalloy under different loading rates at room temperature

引用

Rare Metals 2024年第5期43卷 2317-2323页

作者： Wen-Xiang Gao Dong Ma Li-Li Zhao Fan Ye Ling Shao Su-Jun Wu School of Materials Science and Technology Beihang UniversityBeijing100091China

Serrated flow phenomenon has been widely observed among different metals due to the potential influence on their *** tensile tests of nickel-based superalloy GH536 were carried out at loading rates of 0.06,0.60,3.60,and 36.00 mm·min^(-1)at room temperature,*** tensile stress-strain curves demonstrate repetitive and discontinuous yielding behavior,namely serrated *** is observed that the stress-strain curves were dominated by type B serration,and original annealing twin boundaries(TBs)were distorted to various degrees under comparatively different lower tensile *** contrast,the TBs almost disappear,and the type B serrations become smoother and regular under the higher loading *** phenomenon can be attributed to the interactions between TBs and dislocations during tensile *** effects of the mobile and immobile dislocations illustrate the unsteady amplitude of serrations observed in stress-strain *** electron microscope images of tested pieces reveal the interaction of dislocation and TB,with dislocation tangling around the TBs.

关键词： Nickel-based superalloy serrations Twin boundaries Deformation mechanism

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

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

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：