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Phosphorus segregation in austenite in Fe–P–C, Fe–P–B and Fe–P–C–B alloys
Author(s) -
Paju Martti,
Viefhaus Helmut,
Grabke Hans Jürgen
Publication year - 1988
Publication title -
steel research
Language(s) - English
Resource type - Journals
eISSN - 1869-344X
pISSN - 0177-4832
DOI - 10.1002/srin.198801524
Subject(s) - austenite , grain boundary , metallurgy , boron , phosphorus , quenching (fluorescence) , chemistry , carbon fibers , analytical chemistry (journal) , materials science , crystallography , nuclear chemistry , physics , microstructure , composite material , composite number , fluorescence , organic chemistry , chromatography , quantum mechanics
The equilibrium grain boundary segregation of phosphorus was investigated in Fe–P–C, Fe–P–B and Fe–P–C–B alloys after austenitising at temperatures ranging from 825–1100 °C. The grain boundary concentrations were determined by Auger electron spectroscopy on intergranular fracture surfaces. Phosphorus, carbon and boron segregate to the austenite grain boundaries. The segregation of P in austenite occurs mainly in equilibrium, but some additional segregation takes place during quenching. Boron and, in a lesser degree, carbon were found to decrease the grain boundary concentration of phosphorus. The results can be explained by assuming equilibrium segregation and mutual displacement of these elements in austenite.