The role of grain-boundary cementite in bainite formation in high-carbon steels

被引：19

作者：

Ravi, Ashwath M. ^{[1
]}

Sietsma, Jilt ^{[1
]}

Santofimia, Maria J. ^{[1
]}

机构：

[1] Delft Univ Technol, Dept Mat Sci & Engn, Mekelweg 2, NL-2628 CD Delft, Netherlands

来源：

SCRIPTA MATERIALIA | 2020年 / 185卷

基金：

欧洲研究理事会;

关键词：

Bainite; Kinetics; Nucleation; Isothermal heat treatments; Grain-boundary cementite; ISOTHERMAL TRANSFORMATION KINETICS; MECHANICAL-PROPERTIES; MARTENSITE; STRENGTH; TEMPERATURE; SIZE; ACCELERATION; NUCLEATION; COPPER;

D O I：

10.1016/j.scriptamat.2020.03.042

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Low temperature bainite formation in high-carbon steels leads to highly refined microstructures. However, the rate of bainite formation becomes impractically low as the bainite formation temperature decreases. Thus, it is important to create strategies to accelerate the low-temperature bainite formation kinetics in high-carbon steels. In this work, it is observed that decorating the parent austenite grain boundaries with grain-boundary cementite prior to bainite formation leads to an appreciable acceleration of subsequent bainite formation kinetics due to decrease in activation energy for bainite nucleation at cemenite/austenite interfaces. (C) 2020 Acta Materialia Inc. Published by Elsevier Ltd.

引用

页码：7 / 11

页数：5

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