A quantitative investigation of the effect of Mn segregation on microstructural properties of quenching and partitioning steels. (August 2017)

• Record Type: Journal Article
• Authors: HajyAkbary, Farideh; Sietsma, Jilt; Petrov, Roumen H.; Miyamoto, Goro; Furuhara, Tadashi; Santofimia, Maria Jesus
• Is Part Of: Scripta materialia. Number 137(2017)
• Page Start: 27
• Page End: 30
• Publication Date: 2017-08
• Subjects: Quenching and partitioning -- Segregation -- Microscopy and microanalysis techniques; Materials -- Periodicals; Metallurgy -- Periodicals; Metalen; Legeringen; Materiaalkunde; Metals, metalworking and machinery industries; Metals; Electronic journals; 620.11
• DOI: 10.1016/j.scriptamat.2017.04.040
• Languages: English
• ISSNs: 1359-6462

Abstract

Abstract: Quenching and partitioning (Q&P) process of a 0.3C-1.3Si-3.2Mn (wt%) steel with Mn segregation is studied experimentally and theoretically. During initial quenching a higher fraction of martensite forms in Mn-poor regions compared to Mn-rich regions. In the partitioning process, austenite in Mn-poor regions is surrounded with a higher fraction of martensite than austenite in Mn-rich regions and therefore receives a larger amount of carbon. When carbon partitioning is not sufficient to stabilize austenite, a higher fraction of martensite forms, during final quenching, in Mn-poor regions. Lowering the quenching temperature in the Q&P process reduces inhomogeneity in the distribution of phases. Graphical abstract: