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

提出的研究项目的目的是确定不同铝-钪(Al-Sc)合金激光粉床熔化的工艺-结构-性能关系。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。它赋予铝更高的强度和理想的性能。在凝固过程中，Sc的加入促进了合金中更小、更均匀的颗粒结构，从而产生强度。为了获得更好的强度响应，通常在铝中添加非常少量的Sc(0.05%至0.5%Sc)。该项目的主要目标是设计和制造一种新的Al-Sc合金，该合金具有更高的强度重量比，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采用激光添加制造技术生产的Al-Sc零件的机械性能。该项目是麦克马斯特添加剂制造集团和帝国矿业集团有限公司(帝国)的合作成果。该项目的长期影响是利用Al-Sc合金的添加剂制造在加拿大发展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.