A new material design approach for enhancing the resistance to fatigue and corrosion fatigue failures

该提案旨在进一步开发和验证一种新的材料设计概念，以提高材料在腐蚀环境中对循环裂纹萌生和扩展的抵抗力，特别强调铁素体钢。拟议的工作是建立在长期的研究成果PI的组支持的各种组织和广泛和深入的分析，在过去40年的文献中报道的实验结果。拟议的工作将由4名博士/硕士水平的研究生进行。预计所提出的研究成果将为那些与疲劳相关的材料失效占总失效近90%的行业带来巨大利益。这些好处可能来自以下两个方面：1）由于故障频率降低而提高了生产率，以及2）节省了材料，避免了自然资源的快速耗尽。这项工作不仅将提供一个主要的材料设计概念的验证，但也允许直接应用的设计概念，解决严重的故障问题所面临的行业。目前的工作还将建立一个新材料开发的平台，这将大大提高加拿大工业在世界市场上的竞争力，并保持加拿大在科学和工程方面的优势。

This proposal is aimed to further develop and validate a new concept of materials design for enhancing the resistance of materials to cyclic crack initiation and growth in corrosive environments with a special emphasis of ferritic steels. The proposed work is built on the outcomes of long time research in the PI's group supported by various organizations and the extensive and in-depth analyses of experimental results reported in the literature over past 40 years. The proposed work will be performed by 4 graduate students at the PhD/MSc levels. It is anticipated that the outcomes of the proposed research will yield enormous benefits to the industries where the fatigue-related failures of materials account for nearly 90% of the total failures. The benefits may come from the following two aspects:1) the increase of productivity due to less frequent failures, and 2) the savings of materials avoiding the quick exhaustion of natural resources. The work will not only provide a validation of a major materials design concept but also allow the direct application of the design concept for solving severe failure problems facing the industries. The current work will also establish a flatform for new materials development, which will substantially enhance the competitiveness of Canadian industries in world market and maintain Canadian strength in science and engineering.