The Tensile Response and Fracture Behavior of a Copper-Niobium Microcomposite: Role of Surface Modification

机译：铜铌微复合材料的拉伸响应和断裂行为：表面改性的作用

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In this research study, the influence of nanocrystalline surface modification on microhardness, tensile response and fracture behaviour of an oxide dispersion strengthened copper-niobium (Cu-Nb) micro-composite was investigated. The presence of a hardened surface layer and associated compressive residual stress lead to a noticeable increase in micro-hardness and a marginal improvement in both stiffness and strength. The increase in work hardening is quantified by the mono-tonic stress versus strain curve. For both the as-provided and surface treated composites tensile fracture was macroscopically ductile and microscopically revealed features reminiscent of locally brittle and ductile failure mechanisms. The mechanical properties and fracture behaviour is discussed considering nature of loading and intrinsic microstructural effects.

机译：在这项研究中，研究了纳米晶表面改性对氧化物分散增强的铜铌（Cu-Nb）微复合材料的显微硬度，拉伸响应和断裂行为的影响。硬化的表面层和相关的压缩残余应力的存在导致显微硬度的显着提高以及刚度和强度的略微提高。通过单调应力与应变曲线来量化加工硬化的增加。对于所提供的复合材料和经表面处理的复合材料，拉伸断裂在宏观上都是延性的，而微观上却显示出让人联想到局部脆性和延性破坏机制的特征。考虑了载荷的性质和固有的微观结构效应，讨论了力学性能和断裂行为。

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来源
《Metal-matrix composites: innovations, advances and applications》|2018年|203-220|共18页
会议地点 Phoenix(US)
作者
Paul Arindam; T. S. Srivatsan;
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作者单位

Division of Materials Science and Engineering, Department of Mechanical Engineering. The University of Akron, Akron, OH 44325-3903, USA;

The University of Akron, Akron, OH 44325-3903. USA;

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原文格式 PDF
正文语种 eng
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关键词
Cu-Nb microcomposite; Surface modification; Micro-hardness Tensile response; Tensile fracture; Microstructural effects;

机译：铜-铌微复合材料；表面改性；显微硬度拉伸响应；拉伸断裂；微观结构效应;

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The Tensile Response and Fracture Behavior of a Copper-Niobium Microcomposite: Role of Surface Modification

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