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: 2020
• 资助国家: 加拿大
• 起止时间: 2020-01-01 至 2021-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=717305
• 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.

在过去的几十年里，先进材料和制造工艺的开发取得了实质性进展，以提高承载能力并促进金属部件的维护。高疲劳钢和电子束焊接的开发是能源生产和汽车行业技术突破的例子。尽管这些技术前景广阔，但由于缺乏基础知识和实验数据，无法准确确定尺寸和使用寿命，因此它们在制造和修复疲劳关键部件方面的应用仍然有限。为了充分发挥创新材料和工艺的潜力，在部件疲劳行为以及相关损伤机制的表征和基本理解方面取得重大进展至关重要。 拟议的 DGP 的总体和长期目标是对循环载荷下的相变诱导塑性 (TRIP) 有一个基本的了解，这是开发和制造具有改进的抗裂纹扩展能力的新型材料所必需的。这些新材料的成果与汽车、航空航天和能源生产领域相关。该计划的具体目标 (SO) 是 SO1) 了解和控制奥氏体的机械稳定性（TRIP 动力学）和 SO2) 了解和表征 TRIP 辅助微观结构中的裂纹扩展动力学。 DGP 项目的独特性将转化为在高级疲劳测试、新材料和新工艺的开发以及关键部件的耐用性方面的重大科学贡献，这将引起业界的极大兴趣。它将支持来自魁北克工业（Sodel、Velan、Hydro-Quebec）的创新材料和工艺的开发和接受，重点关注部件的耐用性。它还将有助于采用对能源生产产生积极影响的技术，通过提高部件的承载能力，并通过降低灾难性故障的可能性对环境产生积极影响。 Brochu教授的多学科学术背景与10年专业工程师的工业实践相结合，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 名高素质人才 (HQP) 的培训做出了贡献。八名总部人员将在该发现资助的研究计划内接受培训。