Dissolution Kinetics of Inclusions in Titanium Alloys

钛合金中夹杂物的溶解动力学

• 批准号: RGPIN-2017-03785
• 负责人: Cockcroft, Steven
• 金额: $ 1.75万
• 依托单位: University of British Columbia
• 依托单位国家: 加拿大
• 项目类别: Discovery Grants Program - Individual
• 财政年份: 2017
• 资助国家: 加拿大
• 起止时间: 2017-01-01 至 2018-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=638229
• 关键词: Dissolution; Kinetics; Inclusions; Titanium; Alloys

Titanium alloys are employed in a number industries of importance to Canada including, aerospace, medical, marine, chemical processing, oil and gas, food processing and automotive, often in critical applications. Various types of defects have been identified by the titanium industry and understanding the mechanisms by which these defects can be eliminated is therefore critically important in reducing the processing cost and improving the performance of titanium and its alloys. Two of the defects of concern are: 1) the Type-I, high interstitial defect; and 2) the Type II alpha stabilized defect. Both represent localized chemical in-homogeneities that when present can lead to a significant degradation in the mechanical performance of the alloy, particularly in applications involving cyclic loading. Various approaches are used commercially to avoid their occurrence including feedstock control and melt refining. In the melt consolidation processes, their effective removal hinges on sufficient time at temperature to allow chemical homogenization.

钛合金在加拿大的许多重要行业中使用，包括航空航天，医疗，海洋，化学加工，石油和天然气，食品加工和汽车，通常用于关键应用。钛工业已经确定了各种类型的缺陷，因此，了解可以消除这些缺陷的机制对于降低加工成本和提高钛及其合金的性能至关重要。其中两种值得关注的缺陷是：1）I型，高间隙缺陷;和2）II型α稳定缺陷。两者都代表局部化学不均匀性，当存在时，其可导致合金的机械性能显著降低，特别是在涉及循环负载的应用中。商业上使用各种方法来避免它们的发生，包括原料控制和熔体精炼。在熔融固结过程中，它们的有效去除取决于在允许化学均匀化的温度下的足够时间。