Selective Laser Melting of a Novel Titanium Alloy for Landing Gear Applications

联合技术航空航天系统公司-着陆系统部门-是总部位于安大略省的商用飞机起落架设计和**制造领域的世界领先者。该公司最近参与了一项添加剂**制造(AM)战略的开发，以评估该技术在起落架应用中的可行性。AM指的是一类**工业技术，通常是从3D模型数据制造零件，通常是一层又一层。传统上，钛-6Al-4V(钛-)属于**α+β钛家族，是航空航天应用的首选材料。然而，随着对进一步减轻组件重量的需求的增加，新的(接近)贝塔钛合金牌号正在出现。与阿尔法+贝塔合金相比，这些合金提供了更高的强度和疲劳**寿命。**最近，麦克马斯特的研究人员证明了通过选择性激光熔化(SLM)添加制造一种**罕见的低成本贝塔钛合金的可行性。通过麦克马斯特和UTAS之间的学术和行业合作，我们的目标是开发**技术知识，以证明这种合金用于起落架应用的可行性。为了更好地了解这种材料的加工-组织-性能关系，将进行一项详细的研究，重点是(1)**粉末表征和改性，(2)工艺参数的优化，以及(3)通过使用新型**粉末前体来降低成本。**该项目将使UTAS能够采用一种新的合金用于起落架的AM，其性能超过传统**材料，同时为麦克马斯特的研究团队提供一个机会，以更好地了解贝塔钛合金SLM过程中**组织发展的潜在机制。**

United Technologies Aerospace Systems - Landing Systems Division - is an Ontario-based world leader in the design and**fabrication of landing gear for commercial aircraft. The company has recently been involved in developing an Additive**Manufacturing (AM) strategy to assess the feasibility of this technology for landing gear applications. AM refers to a class of**industrial technologies that make parts from 3D model data, usually layer upon layer. Traditionally, Ti-6Al-4V (Ti-64), in the**alpha+beta titanium family, is the material of choice for aerospace applications. However, with increasing demand for further**reducing component weight, new grades of (near) beta Ti alloys are emerging. These alloys provide higher strength and fatigue**life as compared to alpha+beta alloys.**Recently, McMaster researchers have demonstrated the viability of additively manufacturing via Selective Laser Melting (SLM) an**uncommon low-cost beta Ti alloy. Through an academic-industry partnership between McMaster and UTAS, we aim to develop**technical knowledge to demonstrate the feasibility of this alloy for landing gear applications. A detailed study focusing on (1)**Powder characterization and modification, (2) Optimization of the processing parameters, and (3) Lowering costs by using a novel**powder precursor will be undertaken to better understand the processing-microstructure-properties relationship of this material.**This project will enable UTAS to employ a new alloy for AM of landing gear with properties surpassing those of conventional**materials, while providing McMaster's research team with an opportunity to better understand the mechanisms underlying**microstructure development during SLM of beta Ti alloys.**