@article{e439d0a4f6e34814b821e322e353a50e,
title = "In-situ electron backscatter diffraction of thermal cycling in a single grain Cu/Sn-3Ag-0.5Cu/Cu solder joint",
abstract = "The heterogeneous evolution of microstructure in a single grain Cu/SAC305/Cu solder joint is investigated using in-situ thermal cycling combined with electron backscatter diffraction (EBSD). Local deformation due to thermal expansion mismatch results in heterogeneous lattice rotation within the joint, localised towards the corners. This deformation is induced by the constraint and the coefficient of thermal expansion (CTE) mismatch between the β-Sn, Cu6Sn5 and Cu at interfaces. The formation of subgrains with continuous increase in misorientation is revealed during deformation, implying the accumulation of plastic slip at the strain-localised regions and the activation of slip systems (110)[11]/2 and (0)[111]/2.",
keywords = "In-situ thermal cycling, Microstructure evolution, Pb-free solder, Polygonization",
author = "Tianhong Gu and Yilun Xu and Gourlay, {Christopher M.} and Britton, {T. Ben}",
note = "Funding Information: TBB would like to thank the Royal Academy of Engineering for his research fellowship. CG would like to thank EPSRC ( EP/M002241/11 ) for funding of his research fellowship. We would like to thank EPSRC ( EP/R018863/1 ) for funding. We would like to thank Nihon Superior for positive support and encouragement to conduct this work. We would like to acknowledge Dr. Sergey Belyakov for support in the initial fabrication of the samples and Prof Fionn Dunne for helpful discussions on slip system activity. The microscope and loading frame used to conduct these experiments was supported through funding from Shell Global Solutions and is provided as part of the Harvey Flower EM suite at Imperial. Funding Information: TBB would like to thank the Royal Academy of Engineering for his research fellowship. CG would like to thank EPSRC (EP/M002241/11) for funding of his research fellowship. We would like to thank EPSRC (EP/R018863/1) for funding. We would like to thank Nihon Superior for positive support and encouragement to conduct this work. We would like to acknowledge Dr. Sergey Belyakov for support in the initial fabrication of the samples and Prof Fionn Dunne for helpful discussions on slip system activity. The microscope and loading frame used to conduct these experiments was supported through funding from Shell Global Solutions and is provided as part of the Harvey Flower EM suite at Imperial. Publisher Copyright: {\textcopyright} 2019 Acta Materialia Inc.",
year = "2020",
month = jan,
day = "15",
doi = "10.1016/j.scriptamat.2019.09.003",
language = "English",
volume = "175",
pages = "55--60",
journal = "Scripta Materialia",
issn = "1359-6462",
}