GOALI: Optimization of Zircaloy Intermetallics through Chemistry and Processing Controls

目标：通过化学和加工控制优化锆合金金属间化合物

• 批准号: 9632043
• 负责人: K. Linga Murty
• 金额: $ 3.02万
• 依托单位: North Carolina State University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1996
• 资助国家: 美国
• 起止时间: 1996-08-15 至 1998-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9632043&HistoricalAwards=false
• 关键词: GOALI; Optimization; Zircaloy; Intermetallics; through

9632043 Murty This GOALI grant supports an engineering student for a one year period in industry to investigate the effects of alloy chemistry and process factors on specific intermetallic phases which influence zirconium alloy (Zircaloy) properties and performance. Intermetallics undergo changes in structure that affect mechanical properties and corrosion resistance. The structural include phase nucleation, growth and restructuring during material processing, and these changes are strongly influenced by the concentrations of the alloying elements. Variables include beta-quench temperature and quench rate, post-beta-quench cold-work and annealing, and subsequent cold-work/anneal cycles to control final precipitate morphology. The research examines corrosion (nodular and uniform), microstructure (with particular attention to intermetallics), mechanical properties, and manufacturability, evaluated using automated ball indentation. Zirconium alloy sheet material is used to simulate tubing for ease of fabrication and testing. The study is performed in collaboration with the General Electric Company's Zircaloy manufacturing center in Wilmington, NC, and Vallecitos nuclear center in California. %%% Zircaloys are widely used in fission reactors as thin-walled tubing for cladding nuclear fuel, intermediate grids, channels (BWRs), and calandria tubing (PHWRs). The research program allows a student to learn on-site the metallurgical factors associated with the application of this alloy. ***

9632043 Murty这项守门员赠款支持工程专业的一年的工业时间，以研究合金化学和过程因素对影响锆合金（锆洛伊）特性和性能的特定金属间阶段的影响。 金属间经历了影响机械性能和耐腐蚀性的结构变化。 结构包括相核，材料加工过程中的生长和重组，这些变化受合金元素浓度的强烈影响。 变量包括β-淬灭温度和淬火速率，β-季后冷工作和退火，以及随后的冷工作/退火循环，以控制最终的沉淀形态。 该研究检查了使用自动化球压痕评估的腐蚀（结节性和均匀），微结构（特别注意金属间的），机械性能和制造性。 锆合金材料材料用于模拟管道，以易于制造和测试。 该研究是与北卡罗来纳州威尔明顿市通用电气公司的氧化锆制造中心和加利福尼亚州瓦莱西托斯核中心合作进行的。 %%%%锆石被广泛用于裂变反应堆，用作薄壁管，用于覆盖核燃料，中间网格，通道（BWRS）和Calandria Tubing（PHWRS）。 该研究计划允许学生在现场学习与该合金应用相关的冶金因素。 ***