Open Access

ARTICLE

Computational Modeling of Intergranular Crack Propagation in an Intermetallic Compound Layer

by Tong An^1,2,*, Rui Zhou^1,2, Fei Qin^1,2,*, Pei Chen^1,2, Yanwei Dai^1,2, Yanpeng Gong^1,2

1 Institute of Electronics Packaging Technology and Reliability, Faculty of Materials and Manufacturing, Beijing University of Technology, Beijing, 100124, China
2 Beijing Key Laboratory of Advanced Manufacturing Technology, Beijing University of Technology, Beijing, 100124, China

* Corresponding Authors: Tong An. Email: ; Fei Qin. Email:

(This article belongs to the Special Issue: Mechanical Reliability of Advanced Materials and Structures for Harsh Applications)

Computer Modeling in Engineering & Sciences 2023, 135(2), 1481-1502. https://doi.org/10.32604/cmes.2023.022475

Received 11 March 2022; Accepted 22 June 2022; Issue published 27 October 2022

Abstract

A micromechanical model is presented to study the initiation and propagation of microcracks of intermetallic compounds (IMCs) in solder joints. The effects of the grain aggregate morphology, the grain boundary defects and the sensitivity of the various cohesive zone parameters in predicting the overall mechanical response are investigated. The overall strength is predominantly determined by the weak grain interfaces; both the grain aggregate morphology and the weak grain interfaces control the crack configuration; the different normal and tangential strengths of grain interfaces result in different intergranular cracking behaviors and play a critical role in determining the macroscopic mechanical response of the system.

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Keywords

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