Accession Number : AD0723224

Title :   Grain Boundary Segregation of Impurities in Metals and Intergranular Brittle Fracture.

Descriptive Note : Technical rept.,

Corporate Author : CARNEGIE-MELLON UNIV PITTSBURGH PA METALS RESEARCH LAB

Personal Author(s) : Low,John R. , Jr. ; Smith,Craig L.

Report Date : MAY 1971

Pagination or Media Count : 41

Abstract : Temper embrittlement in low alloy steels was studied by examining changes in the composition of prior austenitic grain boundaries resulting from embrittling treatments performed on an Sb doped 3340 steel. Neutron activation analysis was used to chemically analyse etchant residues obtained from intercrystalline fracture surfaces. Antimony was shown to segregate to the grain boundaries during embrittling while the concentration of nickel in ferritic portions of the boundaries decreased. Embrittlement treatments produced no detectable changes in the chromium content of the boundaries. (Author)

Descriptors :   (*STEEL, *EMBRITTLEMENT), GRAIN BOUNDARIES, IMPURITIES, DUCTILE BRITTLE TRANSITION, TRANSITION TEMPERATURE, NEUTRON ACTIVATION

Subject Categories : Metallurgy and Metallography

Distribution Statement : APPROVED FOR PUBLIC RELEASE