Laser Powder-Bed Fusion of Aluminum-Scandium (Al-Sc) Alloys

拟议的研究项目的目的是确定各种铝钪（Al-Sc）合金的激光粉末床熔合的工艺-结构-性能关系。钪（Sc）是一种稀土元素，是强化铝合金最有效的微合金化元素之一。它赋予铝增加的强度和所需的性能。钪添加剂通过在凝固过程中促进合金中更小、均匀的晶粒结构来产生强度。铝合金中通常会加入极少量的钪（0.05%至0.5%），以获得更好的强度响应。该项目的主要目标是设计和制造一种新的铝钪合金，具有增强的强度重量比，供加拿大汽车和航空航天工业使用。汽车和航空航天行业需要了解使用激光增材制造生产的Al-Sc零件的机械性能。该项目是麦克马斯特增材制造集团和帝国矿业集团有限公司（帝国）之间的合作项目。该项目的长期影响是在加拿大利用铝钪合金的增材制造来开发制造汽车和航空航天部件的额外能力。

The objective of the proposed research project is to identify the process-structure-property relationships for laser powder-bed fusion of various Aluminum-Scandium (Al-Sc) alloys. Scandium (Sc), a rare earth element, is one of the most effective microalloying elements to strengthen Al alloys. It imparts increased strength and desirable properties to aluminum. Scandium additions generate strength by promoting a smaller, homogenous grain structure in alloys during solidification. Very small quantities of Scandium (between 0.05% and 0.5% Sc) are usually added to aluminum for better strength response. The main goal of this project is to design and manufacture a new Al-Sc alloy with an enhanced strength-to-weight ratio for use by the Canadian automotive and aerospace industries. The mechanical properties of Al-Sc parts produced using laser additive manufacturing need to be known for the automotive and aerospace industries. This project is a collaborative effort between McMaster's Additive Manufacturing Group and Imperial Mining Group Ltd. (Imperial). The long-term impact of this project is the development of additional capacity to manufacture automotive and aerospace components in Canada using additive manufacturing of Al-Sc alloy.