Advanced Processing of a Near Beta Titanium Alloy

近β钛合金的先进加工

• 批准号: RGPIN-2017-06347
• 负责人: Kabir, AbuSyedHumaun
• 金额: $ 1.6万
• 依托单位: Carleton University
• 依托单位国家: 加拿大
• 项目类别: Discovery Grants Program - Individual
• 财政年份: 2019
• 资助国家: 加拿大
• 起止时间: 2019-01-01 至 2020-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=678583
• 关键词: Advanced; Processing; Near; Beta; Titanium

Summary of Proposal***Titanium alloys have been widely used in the aerospace, chemical, and biomedical industries due to their high specific strength and excellent corrosion resistance. For the next generation of lighter and energy-efficient aircraft structures, the use of high strength near- Ti-alloys in the fuselage, bogie beam, flap track, nacelles, pylon, and la195nding gear assemblies will be cost effective from the perspective of weight reduction and mechanical properties compared to the industry workhorse Ti-6Al-4V, the most widely used + alloy. Major aerospace manufacturers like Airbus and Boeing have started to use forged near- Ti-alloys as landing gear components. It is expected that near- Ti-alloys will gain wider applications in the future. However, while significant research has been conducted on near- Ti-alloy design, little work has been done to understand the microstructure-mechanical properties correlations from the industrial manufacturing point of view, especially during processes such as, welding, forming, and additive manufacturing (AM).******The properties of near- Ti-alloys are highly dependent on their internal microstructure, which often is composed of multiple phases and precipitates. The volume fraction, size, morphology, and distribution of these precipitates can significantly influence the mechanical properties of the near- Ti-alloys. Therefore, a complete and detailed understanding on phase transformations and microstructural evolution are crucial to optimize the mechanical properties for various applications. I am proposing a detailed study on a near- Ti-alloy using various industrial manufacturing processes, such as joining, forming, and AM. The main objectives of this proposed research program for the next five years are:******(1) To optimize the processing parameters for various industrial manufacturing methods.***(2) To learn how to control the microstructures through different thermal and thermo-mechanical processing. ***(3) To study individual microstructural features quantitatively and correlate it to the corresponding mechanical properties.

***钛合金具有高比强度和优异的耐腐蚀性，在航空航天、化工、生物医药等领域得到了广泛的应用。对于下一代更轻、更节能的飞机结构，在机身、转向架梁、襟翼轨道、机舱、挂架和起落架组件中使用高强度近钛合金，从减轻重量和机械性能的角度来看，与行业主力Ti-6Al-4V（最广泛使用的+合金）相比，将具有成本效益。像空客和波音这样的主要航空制造商已经开始使用锻造的近钛合金作为起落架部件。预计近钛合金将在未来得到更广泛的应用。然而，尽管在近钛合金设计方面进行了大量研究，但从工业制造的角度，特别是在焊接、成形和增材制造（AM）等过程中，很少有工作从微观组织和力学性能的角度来理解。******近钛合金的性能高度依赖于它们的内部组织，通常由多相和析出相组成。这些析出相的体积分数、大小、形貌和分布对近钛合金的力学性能有显著影响。因此，全面而详细地了解相变和微观组织演变对于优化各种应用的力学性能至关重要。我提议详细研究一种近钛合金，使用各种工业制造工艺，如连接、成形和增材制造。该研究计划未来五年的主要目标是：******(1)优化各种工业制造方法的加工参数。***(2)学习如何通过不同的热加工和热机械加工来控制微观结构。***(3)定量研究单个微观组织特征，并将其与相应的力学性能联系起来。