Xu, Yilun, Xian, Jingwei, Stoyanov, Stoyan ORCID: 0000-0001-6091-1226 , Bailey, Christopher ORCID: 0000-0002-9438-3879 , Coyle, Richard, Gourlay, Christopher and Dunne, Fionn (2022) A multi-scale approach to microstructure-sensitive thermal fatigue in solder joints. International Journal of Plasticity, 155:103308. ISSN 0749-6419 (doi:https://doi.org/10.1016/j.ijplas.2022.103308)

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Abstract

This paper presents a multi-scale modelling approach to investigate the underpinning mechanisms of microstructure-sensitive damage of single crystal Sn-3Ag-0.5Cu (wt%, SAC305) solder joints of a Ball Grid Array (BGA) board assembly subject to thermal cycling. The multi-scale scheme couples board-scale modelling at the continuum macro-scale and individual solder modelling at the crystal micro-scale. Systematic studies of tin crystal orientation and its role in fatigue damage have been compared to experimental observations. Crystallographic orientation is examined with respect to damage development, providing evidence-based optimal solder microstructural design for in-service thermomechanical fatigue.

Item Type:	Article
Uncontrolled Keywords:	crystal plasticity; solder joints; SAC305; thermal fatigue; microstructure; multi-scale modelling; thermo-mechanical Reliability
Subjects:	Q Science > Q Science (General)
Faculty / School / Research Centre / Research Group:	Faculty of Engineering & Science Faculty of Engineering & Science > Centre for Numerical Modelling & Process Analysis (CNMPA) Faculty of Engineering & Science > Centre for Numerical Modelling & Process Analysis (CNMPA) > Computational Mechanics & Reliability Group (CMRG) Faculty of Engineering & Science > School of Computing & Mathematical Sciences (CMS)
Last Modified:	07 Jun 2022 11:44
URI:	http://gala.gre.ac.uk/id/eprint/35845

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