TY - JOUR
T1 - A quantitative investigation of the effect of Mn segregation on microstructural properties of quenching and partitioning steels
AU - Hajy Akbary, Farideh
AU - Sietsma, Jilt
AU - Petrov, Roumen H.
AU - Miyamoto, Goro
AU - Furuhara, Tadashi
AU - Santofimia Navarro, Maria
PY - 2017
Y1 - 2017
N2 - 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.
AB - 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.
KW - Microscopy and microanalysis techniques
KW - Quenching and partitioning
KW - Segregation
UR - http://www.scopus.com/inward/record.url?scp=85019024187&partnerID=8YFLogxK
U2 - 10.1016/j.scriptamat.2017.04.040
DO - 10.1016/j.scriptamat.2017.04.040
M3 - Article
AN - SCOPUS:85019024187
SN - 1359-6462
VL - 137
SP - 27
EP - 30
JO - Scripta Materialia
JF - Scripta Materialia
ER -