Effects of Ga Content on Microstructure Evolution and Mechanical Response of Heterostructured Dual-Phase Ag-49Cu Alloys

IF 2.2 4区 材料科学 Q3 MATERIALS SCIENCE, MULTIDISCIPLINARY
Haipeng Yang, Yudong Sui, Yehua Jiang, Zhilong Tan, Xingyu Wang, Hao Zhou
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Abstract

Dual-phase heterostructured metals have excellent mechanical properties. This study systematically evaluated the impact of varying Ga concentrations on the microstructural evolution and mechanical response of dual-phase heterostructured Ag-49 wt.%Cu-xGa (x = 0, 5, 7, and 10 wt.%) alloys. The study utilized scanning electron microscopy (SEM) and nanoindentation experiments to analyze the structure evolution and hardness changes in Ag-Cu-Ga alloys. The results revealed that the volume fraction of the hard domains (Cu-rich phases) and the hardness increased as the Ga content increased. This increase in Ga content led to a greater degree of mechanical incompatibility between the soft and hard domains, ultimately enhancing the mechanical properties of Ag-Cu-Ga alloys. Through the implementation of a loading–unloading–reloading (LUR) test, it was shown that the Ag-49Cu-7Ga specimens exhibited higher levels of hetero-deformation-induced (HDI) stresses compared to the Ag-49Cu specimens that did not contain Ga elements. This difference can be attributed to the solid solution strengthening effect of Ga. Through the use of digital imaging technique (DIC), it has been discovered that the introduction of Ga element into the Ag-Cu-Ga specimen results in the formation of dispersed strain bands on the surface. These strain bands effectively absorb and distribute the applied strains, resulting in the Ag-49Cu-7Ga specimen exhibiting both high strength and good plasticity.

Abstract Image

镓含量对异质结构双相银-49铜合金微结构演变和机械响应的影响
双相异质结构金属具有优异的机械性能。本研究系统地评估了不同镓浓度对双相异质结构 Ag-49 wt.%Cu-xGa(x = 0、5、7 和 10 wt.%)合金的微观结构演变和机械响应的影响。研究利用扫描电子显微镜(SEM)和纳米压痕实验分析了银-铜-镓合金的结构演变和硬度变化。结果表明,随着镓含量的增加,硬域(富铜相)的体积分数和硬度也随之增加。镓含量的增加导致软域和硬域之间的机械不相容性增加,最终提高了银铜镓合金的机械性能。通过实施加载-卸载-再加载(LUR)试验,结果表明与不含镓元素的 Ag-49Cu 试样相比,Ag-49Cu-7Ga 试样表现出更高水平的异质变形诱导应力(HDI)。通过使用数字成像技术(DIC),我们发现在 Ag-Cu-Ga 试样中引入 Ga 元素会在表面形成分散的应变带。这些应变带可有效吸收和分散所施加的应变,从而使 Ag-49Cu-7Ga 试样表现出高强度和良好的塑性。
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来源期刊
Journal of Materials Engineering and Performance
Journal of Materials Engineering and Performance 工程技术-材料科学:综合
CiteScore
3.90
自引率
13.00%
发文量
1120
审稿时长
4.9 months
期刊介绍: ASM International''s Journal of Materials Engineering and Performance focuses on solving day-to-day engineering challenges, particularly those involving components for larger systems. The journal presents a clear understanding of relationships between materials selection, processing, applications and performance. The Journal of Materials Engineering covers all aspects of materials selection, design, processing, characterization and evaluation, including how to improve materials properties through processes and process control of casting, forming, heat treating, surface modification and coating, and fabrication. Testing and characterization (including mechanical and physical tests, NDE, metallography, failure analysis, corrosion resistance, chemical analysis, surface characterization, and microanalysis of surfaces, features and fractures), and industrial performance measurement are also covered
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