Atom Probe Tomography Analysis of Precipitation during Tempering of a Nanostructured Bainitic Steel

被引：48
作者：
Caballero, F. G. [1 ]
Miller, M. K. [2 ]
Garcia-Mateo, C. [1 ]
机构：
[1] Ctr Nacl Invest Met CENIM CSIC, E-28040 Madrid, Spain
[2] Oak Ridge Natl Lab, Mat Sci & Technol Div, Oak Ridge, TN 37831 USA
来源：
METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE | 2011年 / 42A卷 / 12期
基金：
美国能源部;
关键词：
FIELD-ION MICROSCOPY; NI-C MARTENSITES; CARBON MARTENSITE; REDISTRIBUTION; TRANSFORMATION; ELEMENTS;
D O I：
10.1007/s11661-011-0699-7
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Carbon distribution during tempering of a nanostructured bainitic steel was analyzed by atom probe tomography (APT). Three different types of particles are detected on samples tempered at 673 K (400 degrees C) for 30 minutes: lower bainite cementite with a carbon content of similar to 25 at. pct, e-carbides with a carbon content close to 30 at. pct, and carbon clusters, small features with a carbon content of similar to 14 at. pct indicative of a stage of tempering prior to precipitation of e-carbide. After tempering at 773 K (500 degrees C) for 30 minutes, the e-carbide-to-cementite transition was observed. Solute concentration profiles across carbide/ferrite interfaces showed the distribution of substitutional elements in e-carbide and cementite for all the tempering conditions.
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收藏
页码：3660 / 3668
页数：9
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