A modified constitutive model of Ag nanoparticle-modified graphene/Sn-Ag-Cu/Cu solder joints

被引：19

作者：

Han, Y. D. ^{[1
,2
]}

Gao, Y. ^{[1
,2
]}

Jing, H. Y. ^{[1
,2
]}

Wei, J. ^{[3
]}

Zhao, L. ^{[1
,2
]}

Xu, L. Y. ^{[1
,2
]}

机构：

[1] Tianjin Univ, Sch Mat Sci & Engn, Tianjin 300350, Peoples R China

[2] Tianjin Key Lab Adv Joining Technol, Tianjin 300350, Peoples R China

[3] Singapore Inst Mfg Technol, 71 Nanyang Dr, Singapore, Singapore

来源：

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING | 2020年 / 777卷

基金：

中国国家自然科学基金;

关键词：

Solder joints; Nanoindentation; Strengthening stress; Ag-graphene nanosheets; Constitutive model; LEAD-FREE SOLDER; METAL-MATRIX NANOCOMPOSITES; SN-AG; MECHANICAL-PROPERTIES; CU SOLDER; INTERFACIAL REACTIONS; TENSILE PROPERTIES; COMPOSITE SOLDER; CREEP; MICROSTRUCTURE;

D O I：

10.1016/j.msea.2020.139080

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

In this study, Sn-Ag-Cu solder alloys and Sn-Ag-Cu solder alloys reinforced with 0.1 wt% Ag-graphene nanosheets (Ag-GNSs) by mechanical mixing (H for abbreviation) and ball milling (Q for abbreviation), which were referred as SAC, H/0.1Ag-GNSs, and Q/0.1Ag-GNSs, respectively, were used to form solder joints. The creep behavior of the above solder joints was investigated by conducting nanoindentation tests. A method for calculating the strengthening stress generated by the load transfer and orientation of the Ag-graphene nanosheets was proposed. The method considers the geometry and grain data of the Ag-graphene nanosheets, which were obtained through scanning electron microscopy and electron back scattering diffraction. Considering other strengthening stresses generated by the dislocation strengthening, fine grain strengthening, Orowan strengthening for intennetathc compounds and metal matrix nanocomposites, and strengthening stress generated by Ag-graphene nanosheets, a modified constitutive model was proposed to investigate the constitutive behavior for creep performance of solder joints formed by SAC, H/0.1Ag-GNSs and Q/0.1Ag-GNSs. The results show good agreement with the experimental data.

引用

页数：13

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