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The segregation of solute atoms to grain boundaries can have a largeinfluence on the mechanical behavior of polycrystals, particularly in metallicalloys. An overview of 400 calculations of solute-induced changes in grainboundary cohesion from 77 separate studies quantitatively demonstrates that themajority of the variation in solute-induced changes in boundary cohesion isexplained by simple bond-breaking arguments. This trend is robust to changes incrystal structure and computational methods. The secondary contributions toembrittlement from other mechanisms, such as atomic size effects and chargetransfer, are quantified and discussed as well.

A survey of ab-initio calculations shows that segregation-induced grain boundary embrittlement is predicted by bond-breaking arguments