Segregation of boron at prior austenite grain boundaries in a quenched martensitic steel studied by atom probe tomography. (February 2015)

• Record Type: Journal Article
• Authors: Li, Y.J.; Ponge, D.; Choi, P.; Raabe, D.
• Is Part Of: Scripta materialia. Volume 96(2015)
• Page Start: 13
• Page End: 16
• Publication Date: 2015-02
• Subjects: Atom probe tomography -- Martensitic steels -- Grain boundary segregation -- Prior austenite grain boundaries -- Non-equilibrium segregation; Materials -- Periodicals; Metallurgy -- Periodicals; Metalen; Legeringen; Materiaalkunde; Metals, metalworking and machinery industries; Metals; Electronic journals; 620.11
• DOI: 10.1016/j.scriptamat.2014.09.031
• Languages: English
• ISSNs: 1359-6462

Abstract

Abstract : The distribution of B and other alloying elements (C, Cr, Mo) at prior austenite grain boundaries (PAGBs) and in the matrix was quantified by atom probe tomography in a quenched martensitic steel. B and Mo were observed to be segregated only at PAGBs and to be absent at martensite–martensite boundaries. C is segregated both at PAGBs and at martensite–martensite boundaries, whereas Cr is homogeneously distributed in the probed volume. Our results indicate that B undergoes a non-equilibrium segregation.