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Viscoplastic creep and microstructure evolution of Sn-based lead-free solders at low strain
Zhang, Q. K.; Hu, F. Q.; Song, Z. L.; Zhang, Z. F.; Zhang, QK (reprint author), Chinese Acad Sci, Ningbo Inst Mat Technol & Engn, Ningbo 315201, Zhejiang, Peoples R China.
2017-07-31
Source PublicationELSEVIER SCIENCE SA
ISSN0921-5093
Volume701Pages:187-195
AbstractIn this study, the viscoplastic creep behaviors of the Sn-4Ag/Cu, Sn-3Cu/Cu and Sn-58Bi/Cu solder joints under shear stress were in-situ observed, and the evolutions in microstructure of the solders were characterized by in situ EBSD. The results reveal that the creep strain of the Sn-Cu and Sn-Ag solders increase linearly with increasing time. Deformation of the Sn-Cu solder concentrates in some parallel shear bands, while deformation of the Sn-Ag solder is relatively uniform, and the deformation concentration along the joint interface is not obvious for the two solders. The strain concentration around the fine Ag3Sn particles in the Sn-Ag solder is not obvious, while the strain concentration around the large Cu6Sn5 grain in the Sn-Cu solder is serious and result in fracture of the Cu6Sn5 grain. Dynamic high-temperature recovery occurs in the Sn-Ag and Sn-Cu solders, result in grain boundary migration, polygonization and formation of a few low-angle grain boundaries. The Sn-Bi solder deforms through grain boundary sliding and phase boundary sliding, the strain increase exponentially with increasing time, and its grain structure is stable during the deformation process.; In this study, the viscoplastic creep behaviors of the Sn-4Ag/Cu, Sn-3Cu/Cu and Sn-58Bi/Cu solder joints under shear stress were in-situ observed, and the evolutions in microstructure of the solders were characterized by in situ EBSD. The results reveal that the creep strain of the Sn-Cu and Sn-Ag solders increase linearly with increasing time. Deformation of the Sn-Cu solder concentrates in some parallel shear bands, while deformation of the Sn-Ag solder is relatively uniform, and the deformation concentration along the joint interface is not obvious for the two solders. The strain concentration around the fine Ag3Sn particles in the Sn-Ag solder is not obvious, while the strain concentration around the large Cu6Sn5 grain in the Sn-Cu solder is serious and result in fracture of the Cu6Sn5 grain. Dynamic high-temperature recovery occurs in the Sn-Ag and Sn-Cu solders, result in grain boundary migration, polygonization and formation of a few low-angle grain boundaries. The Sn-Bi solder deforms through grain boundary sliding and phase boundary sliding, the strain increase exponentially with increasing time, and its grain structure is stable during the deformation process.
description.department[zhang, q. k. ; hu, f. q. ; song, z. l.] chinese acad sci, ningbo inst mat technol & engn, ningbo 315201, zhejiang, peoples r china ; [zhang, q. k. ; zhang, z. f.] chinese acad sci, inst met res, shenyang natl lab mat sci, shenyang 110016, liaoning, peoples r china
KeywordViscoplastic Creep In-situ Ebsd Polygonization Grain Boundary Sliding Strain Concentration
Subject AreaNanoscience & Nanotechnology ; Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
Funding OrganizationNational Basic Research Program of China [2010CB631006]; Public Projects of Zhejiang Province [2015C31031]
Indexed BySCI
Language英语
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/79173
Collection中国科学院金属研究所
Corresponding AuthorZhang, QK (reprint author), Chinese Acad Sci, Ningbo Inst Mat Technol & Engn, Ningbo 315201, Zhejiang, Peoples R China.
Recommended Citation
GB/T 7714
Zhang, Q. K.,Hu, F. Q.,Song, Z. L.,et al. Viscoplastic creep and microstructure evolution of Sn-based lead-free solders at low strain[J]. ELSEVIER SCIENCE SA,2017,701:187-195.
APA Zhang, Q. K.,Hu, F. Q.,Song, Z. L.,Zhang, Z. F.,&Zhang, QK .(2017).Viscoplastic creep and microstructure evolution of Sn-based lead-free solders at low strain.ELSEVIER SCIENCE SA,701,187-195.
MLA Zhang, Q. K.,et al."Viscoplastic creep and microstructure evolution of Sn-based lead-free solders at low strain".ELSEVIER SCIENCE SA 701(2017):187-195.
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