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Array imaging of inhomogeneous steel welds by measurement of weld material maps

通过测量焊缝材料图对不均匀钢焊缝进行阵列成像

基本信息

批准号：
EP/G045720/1
负责人：
Michael Lowe
金额：
$ 21.41万
依托单位：
Imperial College London
依托单位国家：
英国
项目类别：
Research Grant
财政年份：
2010
资助国家：
英国
起止时间：
2010 至无数据
项目状态：
已结题

来源：
https://gtr.ukri.org/projects?ref=EP%2FG045720%2F1
关键词：
Array imaging inhomogeneous steel welds

项目摘要

This proposal seeks funding for a three year research programme into the radical improvement of defect detection and sizing in inhomogeneous welds, such as austenitic steel welds. Welds of high temperature steels such as austenitic steels and Inconel have stiffness properties which are typically both anisotropic and inhomogeneous, so that ultrasonic wave rays tend to deviate and scatter. This results in inaccurate interpretation of defect sizes. Knowledge of weld maps which describe how the material properties vary throughout the weld, applied to wave propagation models, would allow array images to be corrected to compensate for the deviations of the rays. Work at Manchester University will investigate how weld maps can be constructed, using sectioning, experimental measurements, and materials modelling. Work at Imperial College will investigate the use of ultrasonic array measurements in order to measure such maps non-destructively. The findings will be combined to create a procedure to correct array images to enable accurate sizing of the defects. The work will be done in collaboration with two industrial companies who will both provide realistic weld specimens.The proposal is being submitted within the UK Research Centre in NDE (RCNDE) to the targeted research programme, the funding for which is earmarked by EPSRC for industrially driven research.

该提案旨在为一项为期三年的研究计划提供资金，该计划旨在从根本上改善非均匀焊缝（如奥氏体钢焊缝）的缺陷检测和尺寸确定。诸如奥氏体钢和铬镍铁合金的高温钢的焊缝具有典型地各向异性和不均匀的刚度特性，使得超声波射线倾向于偏离和散射。这导致缺陷尺寸的不准确解释。焊接图的知识，描述了如何在整个焊缝的材料特性变化，应用到波传播模型，将允许阵列图像进行校正，以补偿射线的偏差。曼彻斯特大学的工作将研究如何使用切片，实验测量和材料建模来构建焊接图。在帝国理工学院的工作将研究使用超声波阵列测量，以测量这种地图非破坏性。将结合这些发现创建一个程序，以纠正阵列图像，从而能够准确确定缺陷尺寸。这项工作将与两家工业公司合作完成，两家公司都将提供逼真的焊接试样。该提案正在英国无损检测研究中心（RCNDE）内提交给目标研究计划，EPSRC为工业驱动研究提供了专项资金。