CAREER: Fundamentals of Welding Intermetallic Compounds and Alloys

职业：金属间化合物和合金焊接基础知识

• 批准号: 9702448
• 负责人: Viola Acoff
• 金额: $ 29.83万
• 依托单位: University of Alabama Tuscaloosa
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1997
• 资助国家: 美国
• 起止时间: 1997-06-01 至 2002-05-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9702448&HistoricalAwards=false
• 关键词: CAREER; Fundamentals; Welding; Intermetallic; Compounds

9702448 Acoff This CAREER research plan addresses the autogenous weldability of intermetallic compounds using gamma TiAl as the model material. Objectives of the research are: (1) Development of fusion welding processes for cast and wrought alloys of intermetallic compounds using autogenous welding, identifying the causes of cracks and voids; (2) Determination of the effects of energy input on the weld microstructure and the mechanical properties (hardness, fracture toughness, tensile properties); (3) Simulation of the autogenous fusion zone and heat-affected zone microstructures using computer modeling to predict weld and heat-affected zone microstructures and properties. The educational plan of this project complements the research plan outlined above. Objectives of the proposed educational plan are: (1) Enhance the undergraduate materials curriculum with increased computer simulation and modeling; (2) Involve undergraduate minority students from Stillman College in research activities; and (3) Attract minority students to graduate study at the University of Alabama. %%% As a class of materials, intermetallic compounds and alloys are of technological interest because they are lightweight and maintain high strengths at elevated temperatures (over 1100 C). One such intermetallic compound, gamma-based titanium aluminide, has been of particular interest because its properties demonstrate excellent potential performance in aerospace, structural, and high temperature applications. ***

9702448 ACOFF该职业研究计划探讨了使用伽马区作为模型材料的金属间化合物的自动启示性。 该研究的目的是：（1）使用自动焊接的金属间化合物的铸造和锻造合金开发融合焊接过程，以识别裂纹和空隙的原因； （2）确定能量输入对焊缝微结构和机械性能的影响（硬度，断裂韧性，拉伸特性）； （3）使用计算机建模模拟自体融合区和热影响区微结构，以预测焊接和热影响区的微观结构和性能。 该项目的教育计划补充了上述研究计划。 拟议的教育计划的目标是：（1）通过增加计算机模拟和建模来增强本科材料课程； （2）让来自斯蒂尔曼学院的本科少数族裔学生参加研究活动； （3）吸引少数民族学生在阿拉巴马大学学习研究生学习。 作为一类材料，金属间化合物和合金的%%%具有技术意义，因为它们是轻巧的，并且在高温下（超过1100 c）保持高强度。 一种这种金属间化合物，基于伽马的钛合金，引起了人们的关注，因为其特性在航空航天，结构和高温应用中表现出极好的潜在性能。 ***