铸造双相不锈钢微观结构的表征和三维建模：在超声波传播模拟中的应用

IF 3 2区工程技术 Q2 ENGINEERING, MECHANICAL

International Journal of Pressure Vessels and Piping Pub Date : 2025-01-20 DOI:10.1016/j.ijpvp.2024.105430

Zakaria Aghenzour , Pierre-Emile Lhuillier , Nicolas Leymarie , Vincent Dorval , Alexandre Imperiale

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引用次数: 0

摘要

由于其高强度和耐腐蚀性，铸造双相不锈钢（CDSS）被用于核反应堆的一次冷却剂管道。基于超声检测（UT）的在役无损检测（NDEs）必须进行，以确保其安全运行。然而，准确地检测和确定CDSS组件中的缺陷构成了重大挑战。这主要是由于它们的制造过程，导致其冶金组织具有粗大的晶粒和复杂的微观结构特征，包括具有各种形态尺度的双相成分。因此，在这些结构中，超声波在晶界处受到散射，导致高衰减和结构噪声回波，从而改变了检测结果。使用三维数值模拟工具对这些现象进行建模，并详细描述微观结构，通过量化微观结构特征对无损检测性能的影响，可以更好地理解多波/微观结构的相互作用。本文旨在介绍具有代表性的CDSS微结构的数值模拟结果。由于数值工具的使用和发展，这些双相钢的虚拟显微组织可以在代表元素体积（REVs）中生成不同复杂程度的虚拟显微组织。通过与实验冶金特性的比较，这些转速在不同的尺度上得到了验证。然后使用专用的有限元（FE）软件来定义传播介质，以观察这种微观结构对超声波的影响。这些有限元模拟将通过确定衰减和相速度变化作为波频率的函数来表征有效均匀介质。将模拟得到的衰减结果与不同频率下的实验衰减测量结果进行了比较。

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Characterisation and 3D modelling of Cast Duplex Stainless Steel microstructure: Application to ultrasonic wave propagation simulations

Due to their high strength and corrosion resistance, Cast Duplex Stainless Steels (CDSS) are employed in the primary coolant piping of nuclear power reactors. In-service Non-Destructive Evaluations (NDEs) based on Ultrasonic Testing (UT) must be conducted to ensure their safe operation. However, accurately detecting and sizing flaws within CDSS components poses a significant challenge. This is primarily due to their manufacturing process, which results in metallurgical structures featuring coarse grains and complex microstructural features, including a dual-phase composition with various morphological scales. Thus, in these structures, ultrasonic waves undergo scattering at grain boundaries, leading to high attenuation and structure noise echoes that alter the inspection. Modelling these phenomena using 3D numerical simulation tools with a detailed description of the microstructure allows for a better understanding of the multiple wave/microstructure interactions by quantifying the influence of microstructural characteristics on NDE performance. This paper aims to present the results of numerical simulations applied to representative CDSS microstructures. Thanks to the use and development of numerical tools, virtual microstructures of these duplex steels can be generated with different levels of complexity in Representative Elements Volumes (REVs). These REVs are validated to varying scales through comparison with experimental metallurgical characterisations. They are then used to define the propagation media using dedicated Finite Element (FE) software to observe the impact of this microstructure on ultrasonic waves. These FE simulations will then characterise the effective homogeneous media by determining attenuation and phase velocity variations as a function of the wave frequency. The attenuation results obtained from these simulations are compared with experimental attenuation measurements for different frequencies.

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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.