Microstructure of Low C Steel Isothermally Transformed in the MS to Mf Temperature Range

被引：44

作者：

Kim, Donghwi ^{[1
]}

Lee, Seok-Jae ^{[1
]}

De Cooman, Bruno C. ^{[1
]}

机构：

[1] Pohang Univ Sci & Technol, Grad Inst Ferrous Technol, Mat Design Lab, Pohang 790784, South Korea

来源：

METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE | 2012年 / 43A卷 / 13期

基金：

新加坡国家研究基金会;

关键词：

SNOEK-KOSTER RELAXATION; COLD-WORK PEAK; INTERNAL-FRICTION; LATH MARTENSITE; ORIENTATION RELATIONSHIP; MECHANICAL SPECTROSCOPY; HYPEREUTECTOID STEELS; INTRINSIC-PROPERTIES; INTERFACIAL ENERGY; CARBON-STEELS;

D O I：

10.1007/s11661-012-1338-7

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

An isothermal transformation was observed when a fully austenitized lean-alloyed, low C steel was quenched to a temperature in the M (S) to M (f) temperature range and held at the quenching temperature. The dilatometric analysis revealed that the isothermal transformation was distinct from the bainitic transformation. Internal friction (IF) measurements and X-ray diffraction (XRD) analysis showed that the dislocation density in the isothermal transformation product was larger than in lower bainite, and lower than in athermal martensite. Microstructural analysis by transmission electron microscopy (TEM) revealed that the isothermal transformation product had a specific microstructure consisting of large lath-type constituent units with wavy boundaries, with a Nishiyama-Wassermann orientation relationship (NW OR) with respect to the parent austenite. The isothermal transformation below M (S) proceeds by the thickening of athermally formed laths.

引用

页码：4967 / 4983

页数：17

共 52 条

[1]

AVERBACH BL, 1949, T AM SOC METAL, V41, P1024

[2]

Bagramov R, 2001, PHILOS MAG A, V81, P2797, DOI 10.1080/01418610110049716

[3]

BORDONI PG, 1949, RIC SCI, V19, P851

[4]

Christian J.W., 2002, THEORY TRANSFORMATIO, V1, P546