SBIR Phase I: Non Destructive Evaluation of Hard Alpha Inclusions in Titanium Alloys and Damage Effects Due to Fatigue Using Photon Induced Positron Annihilation (PIPA)

SBIR 第一阶段：使用光子诱导正电子湮灭 (PIPA) 对钛合金中的硬 Alpha 夹杂物以及疲劳造成的损伤效应进行无损评估

• 批准号: 0338502
• 负责人: Jagoda Urban-Klaehn
• 金额: $ 9.93万
• 依托单位: Positron Systems, Inc.
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2004
• 资助国家: 美国
• 起止时间: 2004-01-01 至 2004-06-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0338502&HistoricalAwards=false
• 关键词: SBIR; Phase; Non; Destructive; Evaluation

This Small Business Innovation Research (SBIR) Phase I project will perform research aimed at improved detection levels and characterization of inclusions in critical titanium alloy components. Labeled as either low-density or high-density inclusions, these titanium defects can significantly impact fracture-critical airframe structures and jet engine components, resulting in catastrophic failures. The non-destructive detection of hard alpha inclusions in titanium alloys is currently limited to relatively large inclusions that are on or near the component surface, resulting in high potential for missed defects. Photon Induced Positron Annihilation (PIPA) analysis will be developed to detect these inclusions early in the manufacturing process at any location in the casting, and evaluated as a field use NDI technology that can be used to assess damage buildup in operational aircraft components. Research and development in the area of hard alpha inclusion detection using Photon Induced Positron Annihilation has broad impacts in the aerospace industry, in addition to other industries where titanium is used. Development of this technology has primary implications relative to improved aircraft safety and in the maintenance, surveillance, and replacement of highly expensive aerospace components. With improved knowledge of titanium inclusion damage effects, many current costs in the areas of inspection and component replacement can be substantially reduced. With the increasing usage of titanium in many multi-billion dollar industries, PIPA detection of inclusion damage will become increasingly important to the overall titanium and related industries.

该小型企业创新研究（SBIR）第一阶段项目将进行旨在提高关键钛合金部件中夹杂物的检测水平和表征的研究。这些钛缺陷被标记为低密度或高密度夹杂物，会严重影响飞机关键的机身结构和喷气发动机部件，导致灾难性的故障。钛合金中硬α夹杂物的无损检测目前仅限于部件表面上或附近的相对较大的夹杂物，导致遗漏缺陷的可能性很高。将开发光子诱导正电子湮没（PIPA）分析，以在制造过程的早期在铸件的任何位置检测这些夹杂物，并作为现场使用NDI技术进行评估，该技术可用于评估运营飞机部件中的损伤累积。除了使用钛的其他行业外，在使用光子诱导正电子湮没的硬α夹杂物检测领域的研究和开发在航空航天工业中具有广泛的影响。该技术的发展对提高飞机安全性以及维护、监视和更换昂贵的航空航天部件具有重要意义。随着对钛夹杂物损坏影响的了解的提高，可以大幅降低检查和部件更换领域的许多当前成本。随着钛在许多价值数十亿美元的行业中的使用量不断增加，PIPA对夹杂物损伤的检测对于整个钛及相关行业将变得越来越重要。