Investigation of the elastic/crystallographic anisotropy of welds for improved ultrasonic inspections

Investigation of the elastic/crystallographic anisotropy of welds for improved ultrasonic inspections
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研究焊缝的弹性/晶体各向异性以改进超声波检测

DOI:
10.1016/j.matchar.2014.09.012
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发表时间:
2014
影响因子:
4.7
通讯作者:
Mark A
Mark A
中科院分区:
材料科学1区
文献类型:
--
作者:
Mark A

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超声检测是无损地保证焊接接头初完整性和持续完整性的有效手段。由于焊接区域材料刚度各向异性的空间变化,该技术的精度可能会受到损害。预测的平面内焊接刚度图可用于纠正超声路径以改善结果,但这些是基于对焊接材料的几个假设。本研究检验了这些假设的有效性,并提供了详细的焊缝金属晶粒取向图,由此计算出了英科耐尔600焊缝的刚度图。除焊缝边界附近外,其余部分均吻合良好。进一步发现,晶体生长(最柔顺)方向通常朝向焊接方向,偏离平面约14.5°。对模型进行验证后,对预测刚度图和计算刚度图进行了比较。预测图在大部分焊缝区域是令人满意的。
Ultrasonic inspection is an effective way of ensuring the initial and continued integrity of welded joints non-destructively. The accuracy of the technique can be compromised due to spatial variations in the anisotropy of the material stiffness in the weld region. Predicted in-plane weld stiffness maps can be used to correct the ultrasound paths for improved results, but these are based on several assumptions about the weld material. This study has examined the validity of these assumptions and provided detailed weld metal grain orientation maps from which a stiffness map has been calculated for an Inconel 600 weld. Good agreement was found except near the boundaries of the weld. Further it was found that the crystal growth (most compliant) direction was typically oriented around 14.5° out of plane towards the welding direction. Having validated the model, a comparison of predicted and calculated stiffness maps was made. The predicted map was found to be satisfactory over the majority of the weld area.
DOI: 10.1016/j.ndteint.2008.07.003
发表时间: 2009
影响因子: 4.2
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发表时间: 2010
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