Microstructure and precipitation behavior of advanced RAFM steels for high-temperature applications on fusion reactors

被引：10

作者：

Fernandez, P. ^{[1
]}

Hoffmann, J. ^{[2
]}

Rieth, M. ^{[2
]}

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

机构：

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

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

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

来源：

MATERIALS CHARACTERIZATION | 2021年 / 180卷

关键词：

Advanced steels; Microstructure; Secondary phases; STEM; EELS; FERRITIC-MARTENSITIC STEELS; TRANSFORMATION BEHAVIOR; CREEP STRENGTH; ACTIVATION; 9CR-1MO; DUCTILITY; ALLOYS; POWER;

D O I：

10.1016/j.matchar.2021.111443

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The composition of new eigth 9% Cr reduced activation ferritic/martensitioc steels (RAFMs) has been finely tuned in order to increase the amount of fine MX precipitates and reduce coarse M23C6 carbides through the application of thermomechanical treatments. The microstructural investigations by TEM/STEM and EELS have shown M23C6, M2X (Cr2N), and MX (Ta, V, and Ti-rich) precipitates after tempering at 750 degrees C/2 h. Higher N contens (0.04-0.03 wt%) seems to favored M2X precipitation over MX with V contents round 0.2 wt%. MX-Ti rich presents sizes larger than MX (Ta or V rich). EELS anlysis have shown that the MX (Ta, V and Ti rich) precipitated after tempering at 750 degrees C/2 h are mainly carbo-nitrides. Composition, size, number density and carbon and nitrogen content on MX and M2X is discussed in terms of the composition of each Alloy.

引用

页数：15

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