Effects of Minor Alloying Elements Addition on High Temperat
发布时间：2021-09-11 12:24
由于其低热中子吸收截面,优异的耐腐蚀性和结构完整性,锆合金在PWR的燃料包覆材料中占主导地位。然而,随着反应堆技术的发展和对运行安全的要求越来越高,对包壳材料的高温稳定性提出了更严格的要求。锆合金覆层在正常操作条件下工作良好,但通常在超过900℃的温度下破裂,然而,铁-铬-铝铁素体不锈钢在高温下具有更好的耐中子辐照性和更好的抗氧化性、耐腐蚀性和机械性能,而锆合金有望成为下一代耐事故燃料（ATF）包壳材料。在“簇加胶原子”结构模型的指导下,本文包括铁-铬-铝-M合金的成分特征和添加少量合金元素M（M=钼铌铬/钽）的规律性,以及根据簇模型设计铁-铬-铝-M合金的结构表征并同时做了系统性能检测。研究了铁-铬-铝-M合金元素对微观组织稳定性和微观组织随温度变化的影响,为新型铁素体不锈钢提供了抗干扰燃料包覆材料的候选材料。实验结果表明,细小的第二相析出物（主要是拉弗斯相）均匀分布在旧化合金的铁素体基体中。在高于1000℃的高温下再处理这些合金后,第二相沉淀物开始溶解到基质中。拉弗斯相沉淀物在经过1200℃每小时的再处理后,在含有少量合金元素钼/铌/钽的合金中几乎完全溶解到铁素体基质中,并将合金进...
【文章来源】：大连理工大学辽宁省 211工程院校 985工程院校 教育部直属院校
【文章页数】：75 页
【学位级别】：硕士
【文章目录】：
摘要
Abstract
1 Introduction
1.1 Application Background of Fe-Cr-Al Alloy
1.1.1 Nuclear Power Development History
1.1.2 The Concept of Accident Tolerant Fuel System
1.1.3 Accident-Tolerant Fuel-Resistant Cladding Candidate
1.2 Overview of Nuclear Grade Fe Cr Al Alloy
1.2.1 Research Status at Home and Abroad
1.2.2 Typical Microstructure and Mechanical Properties of Nuclear GradeFe Cr Al Alloy
1.2.3 Element Types and Effects in Nuclear Grade Fe Cr Al Alloy
1.3 Common Alloy Design Method
1.3.1 Element Equivalent Method
1.3.2 Hume-Rothery Rule
1.3.3 Computer Simulation
1.3.4 Cluster Plus Glue Atom Model
1.4 Significance of Research and Objectives
1.4.1 Research Significance
1.4.2 Research Objectives
2 Alloy Composition Design Based on Cluster Model
2.1 Solid Solution Alloy Cluster Plus Glue Atom Structure Model
2.2 Cluster Model and Composition Design of Fe-Cr-Al Ternary Alloy
3 Experimental Methods
3.1 Sample Preparation
3.2 Heat Treatment and Alloy Processing
3.3 XRD X-Ray Diffraction Analysis
3.4 OM Optical Microstructure Analysis
3.5 SEM Scanning Electron Microscopy
3.6 TEM Transmission Electron Microscopy
3.7 EPMA Electron Probe Micro Analysis
3.8 Micro Hardness Testing
4 Results
4.1 X-Ray Diffraction
4.2 Microstructure Characterization
4.3 Electron Probe Micro Analysis
4.4 Transmission Electron Microscopy
4.5 Micro Hardness Study
5 Discussions
5.1 Grain Growth
5.2 Precipitation Behavior
Conclusions
References
Research Publications in Master Study
Acknowledgement
【参考文献】：
期刊论文
[1]基于固溶体短程序结构的团簇式合金成分设计方法[J]. 姜贝贝,王清,董闯. 物理学报. 2017(02)
本文编号：3392995
【文章来源】：大连理工大学辽宁省 211工程院校 985工程院校 教育部直属院校
【文章页数】：75 页
【学位级别】：硕士
【文章目录】：
摘要
Abstract
1 Introduction
1.1 Application Background of Fe-Cr-Al Alloy
1.1.1 Nuclear Power Development History
1.1.2 The Concept of Accident Tolerant Fuel System
1.1.3 Accident-Tolerant Fuel-Resistant Cladding Candidate
1.2 Overview of Nuclear Grade Fe Cr Al Alloy
1.2.1 Research Status at Home and Abroad
1.2.2 Typical Microstructure and Mechanical Properties of Nuclear GradeFe Cr Al Alloy
1.2.3 Element Types and Effects in Nuclear Grade Fe Cr Al Alloy
1.3 Common Alloy Design Method
1.3.1 Element Equivalent Method
1.3.2 Hume-Rothery Rule
1.3.3 Computer Simulation
1.3.4 Cluster Plus Glue Atom Model
1.4 Significance of Research and Objectives
1.4.1 Research Significance
1.4.2 Research Objectives
2 Alloy Composition Design Based on Cluster Model
2.1 Solid Solution Alloy Cluster Plus Glue Atom Structure Model
2.2 Cluster Model and Composition Design of Fe-Cr-Al Ternary Alloy
3 Experimental Methods
3.1 Sample Preparation
3.2 Heat Treatment and Alloy Processing
3.3 XRD X-Ray Diffraction Analysis
3.4 OM Optical Microstructure Analysis
3.5 SEM Scanning Electron Microscopy
3.6 TEM Transmission Electron Microscopy
3.7 EPMA Electron Probe Micro Analysis
3.8 Micro Hardness Testing
4 Results
4.1 X-Ray Diffraction
4.2 Microstructure Characterization
4.3 Electron Probe Micro Analysis
4.4 Transmission Electron Microscopy
4.5 Micro Hardness Study
5 Discussions
5.1 Grain Growth
5.2 Precipitation Behavior
Conclusions
References
Research Publications in Master Study
Acknowledgement
【参考文献】：
期刊论文
[1]基于固溶体短程序结构的团簇式合金成分设计方法[J]. 姜贝贝,王清,董闯. 物理学报. 2017(02)
本文编号：3392995
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