TEM characterization on new 9% Cr advanced steels thermomechanical treated after tempering

被引：21

作者：

Fernandez, P. ^{[1
]}

Hoffmann, J. ^{[2
]}

Rieth, M. ^{[2
]}

Roldan, M. ^{[1
]}

Gomez-Herrero, A. ^{[3
]}

机构：

[1] CIEMAT, Natl Fus Lab, Technol Div, Avda Complutense 40, E-28040 Madrid, Spain

[2] Karlsruhe Inst Technol, Inst Appl Mat, Campus Nord,POB 3640, D-76021 Karlsruhe, Germany

[3] Natl Ctr Electron Microscopy, Av Complutense S-N, Madrid 28040, Spain

来源：

JOURNAL OF NUCLEAR MATERIALS | 2018年 / 500卷

关键词：

FERRITIC-MARTENSITIC STEELS; PRECIPITATION BEHAVIOR; ACTIVATION; STRENGTH; 9CR-1MO; DUCTILITY; CHROMIUM; CARBIDES; CLAM;

D O I：

10.1016/j.jnucmat.2017.12.025

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Phase transformation on new six reduced activation ferritic/martensitic steels (RAFMs) was investigated to provide the basis for the design and development of advanced steels to maintain adequate strength and creep resistance above 500 degrees C. The new alloys are designed to increase the amount of fine MX precipitates and reduce coarse M23C6 carbides through alloy composition refinement and the application of thermomechanical treatments. The microstructural investigations by TEM have shown M23C6, M2X, and MX precipitation after tempering at 700 degrees C/2h with low dislocation recovery, while at 825 degrees C/2h the martensite developed to subgrain formation and growth. At this stage, only M23C6 and MX were detected. Preliminary results demonstrate that it is feasible to produce fine MX strengthened particles dispersed in the matrix with further optimization of tempering treatments. (C) 2017 Elsevier B.V. All rights reserved.

引用

页码：1 / 10

页数：10

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