Development of a non-destructive technique for the detection of hydrogen embrittlement in landing gears

该项目与加拿大赛峰着陆系统公司合作，旨在开发一种无损检测（NDT）策略，用于检测起落架中遇到的氢脆（HE）。尽管人们努力了解氢脆问题，但仍然缺乏令人满意的检测方法。在制造过程中早期检测到热交换器将消除与进一步处理相关的经济损失，并防止起落架的灾难性故障。随着问题的现状，赛峰集团有兴趣推进对令人满意和可行的HE检测技术的研究。主要范围是确定对氢的存在最敏感的物理性质（例如热、电、磁）。与检测材料中溶解的氢量不同，通过氢对起落架钢的物理性能的影响来检测氢足迹是可行的。本项目将开展必要的研究，开发基于物理性能检测的NDT技术，可在制造过程中应用。这将能够监测氢对起落架材料的物理和机械性能的影响，并能够观察与延展性和脆化损失相关的物理性能的最大变化。将进行实验室规模的实验，并了解赛峰集团目前的工业实践。该项目将涵盖材料和表面工程，材料加工，物理和机械性能和测试以及故障分析等方面的广泛专业知识。申请人的实验室备有所有必要的设备。该项目最终将为赛峰集团和其他航空航天工业提出长期氢脆检测问题的潜在解决方案。该研究将为加拿大航空航天领域的企业沿着其他工程应用提供技术和经济利益，如石油和天然气行业的管道故障。

In collaboration with Safran Landing Systems Canada, this project aims at developing a Non-Destructive Testing (NDT) strategy for the detection of Hydrogen Embrittlement (HE) encountered in landing gears. Despite the efforts made to understand the hydrogen embrittlement problem, satisfactory methods of detection are still lacking. Early detection of the HE during manufacturing will eliminate the financial loss associated with further processing and prevent catastrophic failure of landing gears. With the current state of the problem, Safran is interested in advancing the search for satisfactory and feasible HE detection techniques. The primary scope is to determine the physical properties (e.g. thermal, electrical, magnetic) that are the most sensitive to the presence of hydrogen. Detecting hydrogen footprint through its effect on the physical properties of the landing gear steel is feasible unlike trying to detect the amount of hydrogen dissolved in the material.In this project, necessary studies for the development of an NDT technique based on physical property testing that can be applied during manufacturing will be carried out. This will enable monitoring the effect of hydrogen on physical and mechanical properties of landing gear materials and will enable observing the largest change in physical properties associated with loss of ductility and embrittlement. Laboratory scale experiments will be conducted and complimented with understanding the current industrial practices at Safran. This project will cover a wide range of expertise in materials & surface engineering, material processing, physical and mechanical properties & testing and failure analysis. All necessary equipment are available at the applicants' laboratories. This project will finally propose to Safran and other aerospace industries potential solutions for the long lasting hydrogen embrittlement detection problem. The research will provide technological and economic benefits to Canadian businesses in the aerospace sector along with other engineering applications such as pipeline failures in oil and gas industry.