Thermographic procedure for the assessment of Resistance Projection Welds (RPW): Investigating parameters and mechanical performances

IF 3.8 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY
G. Dell'Avvocato, D. Palumbo
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引用次数: 0

Abstract

This study presents a non-destructive testing (NDT) thermographic procedure for assessing the quality and mechanical strength of Resistance Projection Welded (RPW) joints with rectangular embossments. We analysed twelve RPW joints by systematically varying process parameters based on a factorial design. These joints underwent flash thermography followed by mechanical tests to evaluate the maximum breaking force (Fmax). Significant statistical correlations between process parameters (time and force) and Fmax were established. Furthermore, we found a correlation (p-value 0.86) between the optically measured fused region and Fmax. Subsequently, we developed a pulsed phase thermography-based procedure for non-destructively measuring the fused region, resulting in an average difference of approximately 4 % compared to optical measurements. An empirical linear relationship was derived to correlate the welded area obtained by thermal data with Fmax, enabling the estimation of mechanical joint strength through non-destructive pulsed thermography. This research offers a promising approach for assessing the mechanical integrity of RPW joints using thermal imaging techniques.

Abstract Image

用于评估电阻凸焊 (RPW) 的热成像程序:研究参数和机械性能
本研究介绍了一种无损检测(NDT)热成像程序,用于评估带有矩形压纹的电阻凸焊(RPW)接头的质量和机械强度。我们通过系统地改变基于因子设计的工艺参数,对十二个 RPW 接头进行了分析。对这些接头进行了闪光热成像,然后进行了机械测试,以评估最大断裂力(Fmax)。结果表明,工艺参数(时间和力)与 Fmax 之间存在显著的统计相关性。此外,我们还发现光学测量的熔合区域与 Fmax 之间存在相关性(p 值为 0.86)。随后,我们开发了一种基于脉冲相位热成像的程序,用于非破坏性地测量熔合区域,结果与光学测量相比,平均差异约为 4%。我们得出了一种经验线性关系,将热数据获得的焊接区域与 Fmax 相关联,从而能够通过非破坏性脉冲热成像技术估算机械接头强度。这项研究为利用热成像技术评估 RPW 接头的机械完整性提供了一种可行的方法。
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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来源期刊
CiteScore
7.10
自引率
9.80%
发文量
58
审稿时长
44 days
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