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

这项建议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特别是铁素体钢的抗循环裂纹萌生和扩展的能力。拟议的工作建立在不同组织支持的国际和平研究所长期研究成果和对过去40年文献中报告的实验结果的广泛和深入分析的基础上。拟议的工作将由4名博士/硕士研究生完成。预计拟议的研究结果将为材料疲劳相关失效占总失效的近90%的行业带来巨大的好处。好处可能来自以下两个方面：1)由于较少的故障而提高了生产率，2)节省了材料，避免了自然资源的快速枯竭。这项工作不仅将提供对主要材料设计概念的验证，而且还允许直接应用设计概念来解决行业面临的严重故障问题。目前的工作还将为新材料开发建立一个平台，这将大大增强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.