Effects of Minor Alloying Elements Addition on High Temperature Microstructural Stability of Fe-Cr-Al Ferritic Stainless Steels

目录

声明

1 Introduction

1.1 Application Background of Fe-Cr-Al Alloy

1.1.1Nuclear Power Development History

1.1.2The Concept of Accident Tolerant Fuel System

1.1.3Accident-Tolerant Fuel-Resistant Cladding Candidate

1.2 Overview of Nuclear Grade FeCrAl Alloy

1.2.1Research Status at Home and Abroad

1.2.2Typical Microstructure and Mechanical Properties of Nuclear Grade FeCrAl Alloy

1.2.3Element Types and Effects in Nuclear Grade FeCrAl Alloy

1.3 Common Alloy Design Method

1.3.1Element Equivalent Method

1.3.2Hume-Rothery Rule

1.3.3Computer Simulation

1.3.4Cluster Plus Glue Atom Model

1.4 Significance of Research and Objectives

1.4.1Research Significance

1.4.2Research Objectives

2Alloy Composition Design Based on Cluster Model

2.2 Cluster Model and Composition Design of Fe-Cr-Al Ternary Alloy

3Experimental Methods

3.2 Heat Treatment and Alloy Processing

3.3 XRD X-Ray Diffraction Analysis

3.7 EPMA Electron Probe Micro Analysis

3.8 Micro Hardness Testing

4 Results

4.2 Microstructure Characterization

1. A01:Fe78.61Al4.75Cr13.49Mo2.07Nb0.50Ta0.98

2.A02: Fe78.26Al4.73Cr13.49Mo2.07Nb0.47Ta0.91Zr0.07

3.A03: Fe78.26Al4.73Cr13.49Mo2.07Nb0.47Ta0.87Zr0.11

4.A04: Fe78.36Al4.73Cr13.51Mo2.08Nb0.34Ta0.65Zr0.33

4.3Electron Probe Micro Analysis

4.1 Transmission Electron Microscopy

4.2 Micro Hardness Study

5 Discussions

5.1 Grain Growth

5.2 Precipitation Behavior

Conclusions

参考文献

Research PublicationsinMaster Study

致谢

Dalian University of Technology Copyright Use Authorizationof Master Degree Dissertation