Optimization of mechanically induced phase transformation at crack tip in metal for improved crack growth resistance

优化金属裂纹尖端的机械诱导相变以提高抗裂纹扩展能力

• 批准号: RGPIN-2020-05622
• 负责人: Brochu, Myriam
• 金额: $ 2.84万
• 依托单位: École Polytechnique de Montréal
• 依托单位国家: 加拿大
• 项目类别: Discovery Grants Program - Individual
• 财政年份: 2022
• 资助国家: 加拿大
• 起止时间: 2022-01-01 至 2023-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=754415
• 关键词: Optimization; mechanically; induced; phase; transformation

Over the past decades, substantial progress has been made on the development of advanced materials and manufacturing processes to increase load bearing capacity and to facilitate the maintenance of metallic components. Development of high fatigue resistant steels and electron beam welding are examples of technological breakthroughs used in the energy production and automotive industries. While these technologies are promising, their utilization to manufacture and repair fatigue critical components remains limited due to the lack of fundamental knowledge and experimental data that prevent accurate sizing and service life prediction. To unleash the full potential of innovative materials and processes, it is crucial that significant progress be made on the characterization and fundamental understanding of component's fatigue behavior, and the related damage mechanisms. The overarching and long-term goal of the proposed DGP is to develop a fundamental understanding of the transformation induced plasticity (TRIP) under cyclic loading required to the development and manufacture of novel materials with an improved resistance to crack propagation. Outcomes for these new materials are pertinent for the automotive, the aerospace and the energy production sectors. The specific objectives (SO) of the program are SO1) to understand and control the mechanical stability of austenite (TRIP kinetic) and SO2) to understand and characterize the crack growth kinetic in the TRIP-aided microstructures. The uniqueness of the DGP program will translate into major scientific contributions on advanced fatigue testing, on the development of new materials and processes and on the durability of critical component that will be of great interest to the industry. It will support the development and acceptance of innovative materials and processes stemming from Quebec industries (Sodel, Velan, Hydro-Quebec) with a strong emphasis on components durability. It will also contribute to the adoption of technologies that will have a positive impact on energy production, by improving the load bearing capacity of components, and on the environment, by reducing the probability of catastrophic failures. Prof. Brochu's multidisciplinary academic background combined with a 10-year period of industrial practice as a professional engineer have enriched her academic work and contributed to her international recognition as a leader in the field of fatigue of metallic materials. Since 2011, the nominee has contributed to the training of 59 highly qualified persons (HQP)s. Eight HQPs will be trained within the research program of this discovery grant.

在过去的几十年中，在高级材料和制造过程的开发方面取得了重大进展，以提高负载能力并促进金属组件的维护。高疲劳钢和电子束焊接的开发是能源生产和汽车行业中使用的技术突破的例子。尽管这些技术是有希望的，但由于缺乏基本知识和实验数据，它们的生产和修复疲劳关键组件的利用仍然有限，从而阻止了准确的尺寸和使用寿命预测。为了释放创新材料和过程的全部潜力，至关重要的是，对组件疲劳行为的表征和基本理解以及相关的损害机制至关重要。提出的DGP的总体和长期目标是在开发和制造新型材料所需的环状载荷下对转化诱导的可塑性（TRIP）的基本了解，并提高了裂纹繁殖的抵抗力。这些新材料的结果与汽车，航空航天和能源生产部门有关。程序的特定目标（SO）是SO1），以理解和控制奥氏体（TRIP动力学）和SO2的机械稳定性），以理解和表征TripAid的微观结构中的裂纹生长动力学。 DGP计划的独特性将转化为先进的疲劳测试，新材料和过程的开发以及关键组件的耐用性，这将引起该行业的极大兴趣。它将支持由魁北克工业（Sodel，Velan，Hydro-Quebec）产生的创新材料和过程的开发和接受，并强调了组件耐用性。它还将通过减少灾难性故障的可能性来提高组件的负载能力以及对环境的负载能力以及对环境的负载能力，从而有助于采用对能源生产产生积极影响的技术。 Brochu教授的跨学科学术背景与专业工程师的十年工业实践相结合，丰富了她的学术工作，并为她作为金属材料疲劳领域的领导者的国际认可做出了贡献。自2011年以来，提名人已为59名高素质人（HQP）s培训做出了贡献。该发现赠款的研究计划将对八个HQP进行培训。