CAREER: Enhanced Ductility Aluminum Alloys: An Economical Alternative for Superplastic Forming

9702156 Taleff经济、增强延展性铝合金的工程需要在三个科学领域的理解上取得重大进展，这是本基金的主要研究目标。这些目标是对以下方面建立定量的、预测性的理解：(1)Al—Mg材料中三元溶质添加对溶质-阻力蠕变机制的影响；(2)溶质-拖曳蠕变过程中空洞的形核和生长与颗粒含量和溶质化学的关系；(3)通过更好地理解支配延性的颈缩和空化机制，研究受溶质-阻力蠕变变形的材料的拉伸延性。CAREER教育活动包括以下四个基本目标：(1)结合材料理论讲座和动手实验活动，为本科生提供独特的材料力学行为教学方法；(2)利用研究经验和数据作为教育实例的各类材料力学行为的独特研究生课程；(3)将本科生纳入科学和工程研究，以显著提高他们的教育水平；(4)结合现有的指导、外展和大学项目，对高中生进行科学教育。这项研究活动的成功预计将对制造业产生重大的长期影响。经济，增强延展性铝合金的创造将大大降低超塑性成形作为一种制造选择的价格。＊＊＊

9702156 Taleff The engineering of economical, enhanced-ductility aluminum alloys requires significant advancements in understanding of three scientific areas, which are the principal research goals of this grant. These goals are to create a quantitative, predictive understanding of the following: (1) the effects which ternary solute additions in Al--Mg materials have on the solute-drag creep deformation mechanism; (2) the nucleation and growth of cavities during solute-drag creep as a function of particulate content and solute chemistry; and (3) the tensile ductility in materials subjected to deformation by solute--drag creep through a better understanding of the mechanisms of necking and cavitation, which govern ductility. The CAREER educational activities consist of four fundamental goals, as follows: (1) a unique instructional approach for undergraduates in the mechanical behavior of materials by incorporating lectures on materials theory with hands-on laboratory activities; (2) unique graduate courses in the mechanical behavior of various classes of materials which utilize research experience and data as educational examples; (3) incorporation of undergraduate students into scientific and engineering research as a significant enhancement to their educations; and (4) the scientific education of high-school students through association with existing mentoring, outreach, and University programs. %%% Success of this research activity is expected to have significant long-term effects in manufacturing. The creation of economical, enhanced-ductility aluminum alloys will significantly decrease the price of superplastic forming as a manufacturing alternative. ***