Three-dimensional atom probe analysis of boron segregation at austenite grain boundary in a low carbon steel - Effects of boundary misorientation and quenching temperature. (September 2018)

• Record Type: Journal Article
• Authors: Miyamoto, Goro; Goto, Ai; Takayama, Naoki; Furuhara, Tadashi
• Is Part Of: Scripta materialia. Number 154(2018)
• Page Start: 168
• Page End: 171
• Publication Date: 2018-09
• Subjects: Segregation -- Boron -- Three-dimensional atom probe -- Grain boundary; Materials -- Periodicals; Metallurgy -- Periodicals; Metalen; Legeringen; Materiaalkunde; Metals, metalworking and machinery industries; Metals; Electronic journals; 620.11
• DOI: 10.1016/j.scriptamat.2018.05.046
• Languages: English
• ISSNs: 1359-6462

Abstract

Abstract: Segregation of boron at random austenite grain boundaries with known misorientation angle in a boron-added low carbon steel quenched from austenite state at different temperatures was investigated quantitatively using three-dimensional atom probe. Boron segregation is reduced at low angle boundaries or low quenching temperatures. The latter result indicates that non-equilibrium boron segregation plays an important role and is enhanced at higher quenching temperature due to more excess vacancies and longer diffusion distance during quenching from higher temperature. Graphical abstract: Unlabelled Image