Grain boundary cracking From: Metallurgical and Materials Transactions | Date: June 1, 1998| Author: | Copyright Minerals, Metals & Materials Society Jun 1998. Provided by ProQuest LLC.Copyright information

A chronological summary is given of the various types of grain boundary fracture found in metals. In each case, there is an impurity that adsorbs at the new (fracture) surface being formed. For the case of Fe-P alloys, a quantitative argument can show that adsorption of phosphorous on the free surface greatly reduces the barrier to void nucleation compared to that in the absence of phosphorous. The same or larger reduction would appear for any other element, which adsorbs more strongly than phosphorous and displaces it at the surface. Such an argument is shown to explain a great many cases of ...

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