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

本提案旨在进一步发展和验证一种新的材料设计概念，以增强材料在腐蚀环境中抗循环裂纹萌生和扩展的能力，特别强调铁素体钢。这项拟议的工作是建立在PI小组长期研究的结果之上的，该小组得到了各种组织的支持，并对过去40年来文献中报告的实验结果进行了广泛而深入的分析。建议的工作将由4名博士/硕士研究生完成。预计所提出的研究结果将为材料疲劳相关失效占总失效近90%的行业带来巨大的利益。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；2)节省了材料，避免了自然资源的迅速枯竭。这项工作不仅将为主要材料设计概念提供验证，还将允许直接应用设计概念来解决工业面临的严重故障问题。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，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.