Effects of Minor Alloying Elements Addition on High Temperat
發(fā)布時間：2021-09-11 12:24
由于其低熱中子吸收截面,優(yōu)異的耐腐蝕性和結構完整性,鋯合金在PWR的燃料包覆材料中占主導地位。然而,隨著反應堆技術的發(fā)展和對運行安全的要求越來越高,對包殼材料的高溫穩(wěn)定性提出了更嚴格的要求。鋯合金覆層在正常操作條件下工作良好,但通常在超過900℃的溫度下破裂,然而,鐵-鉻-鋁鐵素體不銹鋼在高溫下具有更好的耐中子輻照性和更好的抗氧化性、耐腐蝕性和機械性能,而鋯合金有望成為下一代耐事故燃料（ATF）包殼材料。在“簇加膠原子”結構模型的指導下,本文包括鐵-鉻-鋁-M合金的成分特征和添加少量合金元素M（M=鉬鈮鉻/鉭）的規(guī)律性,以及根據簇模型設計鐵-鉻-鋁-M合金的結構表征并同時做了系統(tǒng)性能檢測。研究了鐵-鉻-鋁-M合金元素對微觀組織穩(wěn)定性和微觀組織隨溫度變化的影響,為新型鐵素體不銹鋼提供了抗干擾燃料包覆材料的候選材料。實驗結果表明,細小的第二相析出物（主要是拉弗斯相）均勻分布在舊化合金的鐵素體基體中。在高于1000℃的高溫下再處理這些合金后,第二相沉淀物開始溶解到基質中。拉弗斯相沉淀物在經過1200℃每小時的再處理后,在含有少量合金元素鉬/鈮/鉭的合金中幾乎完全溶解到鐵素體基質中,并將合金進...
【文章來源】：大連理工大學遼寧省 211工程院校 985工程院校 教育部直屬院校
【文章頁數】：75 頁
【學位級別】：碩士
【文章目錄】：
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
【參考文獻】：
期刊論文
[1]基于固溶體短程序結構的團簇式合金成分設計方法[J]. 姜貝貝,王清,董闖. 物理學報. 2017(02)
本文編號：3392995
【文章來源】：大連理工大學遼寧省 211工程院校 985工程院校 教育部直屬院校
【文章頁數】：75 頁
【學位級別】：碩士
【文章目錄】：
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
【參考文獻】：
期刊論文
[1]基于固溶體短程序結構的團簇式合金成分設計方法[J]. 姜貝貝,王清,董闖. 物理學報. 2017(02)
本文編號：3392995
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