Variation of ductile-brittle transition temperature for Charpy curve provided by hyperbolic tangent function

IF 3 2区工程技术 Q2 ENGINEERING, MECHANICAL International Journal of Pressure Vessels and Piping Pub Date : 2025-03-01 DOI:10.1016/j.ijpvp.2025.105495

Naoki Miura, Tomoki Shinko, Akiyoshi Nomoto

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Abstract

The effect of temperature on Charpy V-notch absorbed energy (CVE) is typically represented by a Charpy curve provided by a hyperbolic tangent function. In evaluating the structural integrity of reactor pressure vessel steels, T_41J (the temperature corresponding to CVE = 41 J) serves as an index of CVE ductile-brittle transition temperature. Empirically, there exists variation in CVE, which is perceived as an inherent property variation. This variation introduces uncertainty in estimating T_41J. In this paper, we propose a model to derive the standard deviation of T_41J based on the propagation law of uncertainty, considering the average characteristics of the Charpy curve provided by a hyperbolic tangent function. The validity of the model is substantiated through Monte Carlo analysis. Additionally, we conduct a comprehensive parameter survey to assess the effects of various factors on the standard deviation of T_41J.

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来源期刊

International Journal of Pressure Vessels and Piping 工程技术-工程：机械

CiteScore

5.30

自引率

13.30%

发文量

208

审稿时长

17 months

期刊介绍： Pressure vessel engineering technology is of importance in many branches of industry. This journal publishes the latest research results and related information on all its associated aspects, with particular emphasis on the structural integrity assessment, maintenance and life extension of pressurised process engineering plants. The anticipated coverage of the International Journal of Pressure Vessels and Piping ranges from simple mass-produced pressure vessels to large custom-built vessels and tanks. Pressure vessels technology is a developing field, and contributions on the following topics will therefore be welcome: • Pressure vessel engineering • Structural integrity assessment • Design methods • Codes and standards • Fabrication and welding • Materials properties requirements • Inspection and quality management • Maintenance and life extension • Ageing and environmental effects • Life management Of particular importance are papers covering aspects of significant practical application which could lead to major improvements in economy, reliability and useful life. While most accepted papers represent the results of original applied research, critical reviews of topical interest by world-leading experts will also appear from time to time. International Journal of Pressure Vessels and Piping is indispensable reading for engineering professionals involved in the energy, petrochemicals, process plant, transport, aerospace and related industries; for manufacturers of pressure vessels and ancillary equipment; and for academics pursuing research in these areas.