用减薄CTOD试样预测厚板CTOD值的有效厚度公式

Q4 Materials Science

Welding International Pub Date : 2023-03-04 DOI:10.1080/09507116.2023.2193517

Yoshifumi Takaki, T. Sakimoto, T. Handa, S. Igi

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引用次数: 0

摘要

摘要在海洋结构应用中，对大厚度板的需求越来越大，以CTOD为代表的断裂韧性是大厚度板最重要的性能之一。CTOD测试应按材料的全厚度进行，但这需要大量的时间和成本，尤其是当厚度超过100时使用减薄CTOD测试来估计全厚度板的CTOD对于加速实验室中的材料开发是很重要的。作为使用减薄CTOD试验估算全厚度CTOD的传统方法，只考虑了全厚度和减薄试样之间的裂纹驱动力差异。然而，对于全厚度和减薄试样，有必要考虑板厚度方向上的裂纹驱动力。作为第一步，本文研究了考虑板厚方向裂纹驱动力的参数对母材有效厚度的影响。最后，在影响参数的基础上，提出了有效厚度的计算公式。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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Formulation of effective thickness for predicting CTOD value of heavy thickness plates using reduced thickness CTOD specimens

Abstract Demand for heavy thickness plate is increasing in offshore structure application and fracture toughness represented by CTOD is one of the most important properties for these heavy thickness plate. CTOD tests shall be conducted as full thickness of the material but it takes a lot of time and cost, especially with the thickness exceeds 100 mm. It is important to estimate the CTOD of full thickness plate using reduced thickness CTOD tests to accelerate material development in the laboratory. As a conventional estimating method for full thickness CTOD using the reduced thickness CTOD test, only the difference of crack driving force between full thickness and reduced thickness specimens have been considered. However, it is necessary to consider crack driving force in plate thickness direction for full thickness and reduced thickness specimens. As the first step, the influence of parameters on effective thickness considering crack driving force in plate thickness direction for the base metal is investigated in this study. Finally, the formulation of effective thickness is proposed on the base of the influential parameters.

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来源期刊

Welding International Materials Science-Metals and Alloys

CiteScore

0.70

自引率

0.00%

发文量

期刊介绍： Welding International provides comprehensive English translations of complete articles, selected from major international welding journals, including: Journal of Japan Welding Society - Japan Journal of Light Metal Welding and Construction - Japan Przeglad Spawalnictwa - Poland Quarterly Journal of Japan Welding Society - Japan Revista de Metalurgia - Spain Rivista Italiana della Saldatura - Italy Soldagem & Inspeção - Brazil Svarochnoe Proizvodstvo - Russia Welding International is a well-established and widely respected journal and the translators are carefully chosen with each issue containing a balanced selection of between 15 and 20 articles. The articles cover research techniques, equipment and process developments, applications and material and are not available elsewhere in English. This journal provides a valuable and unique service for those needing to keep up-to-date on the latest developments in welding technology in non-English speaking countries.