Incipient grain boundary melting

Author: Campbell, J.

Source: Materials Science and Technology, Volume 25, Number 1, January 2009 , pp. 125-126(2)

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Abstract:

The porosity and loss of properties that usually follows incipient melting of grain boundary phases during heat treatment or welding is suggested to be the result of the expansion accompanying melting, which is not reversed on resolidification because of the opening of extrinsic defects introduced during casting that the author has called bifilms. The asymmetry of melted phases, and techniques that can avoid the degradation of properties are consistent with this hypothesis.

Keywords: INCIPIENT MELTING; BIFILMS; HEAT AFFECTED ZONE POROSITY; WELDING; CASTING; DEFECTS

Document Type: Short Communication

DOI: http://dx.doi.org/10.1179/174328408X311080

Publication date: 2009-01-01

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