High-temperature in-process inspection followed by 96-h robotic inspection of intentionally manufactured hydrogen crack in multi-pass robotic welding
High-temperature in-process inspection followed by 96-h robotic inspection of intentionally manufactured hydrogen crack in multi-pass robotic welding
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DOI：
10.1016/j.ijpvp.2020.104288
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发表时间：
2021-02-01
影响因子：
3
通讯作者：
Gachagan, Anthony
中科院分区：
文献类型：
--
作者：
Javadi, Yashar;Mohseni, Ehsan;Gachagan, Anthony
本研究介绍了两种新技术，以定量地解决理解焊接过程中的氢致开裂（HIC）的挑战性问题。第一种技术是一种新的程序，以创建一个已知的和受控的HIC焊接样品。第二种是过程中监测技术，用于测量多道焊接中HIC的初始形成和随后的生长，同时与焊接过程相关的高温兼容。HIC的发起使用局部淬火方法的焊缝和它的字符进行了验证，使用宏观和微观调查。在HIC引发和生长期间，使用安装在机器人上的定制无损检测（NDT）系统每1-30分钟监测样品，总共96小时，该系统确保可重复的检查定位。因此，结合这些技术，第一次允许，在多道焊接样品中的HIC的演变的详细了解。我们的研究结果表明，HIC开始后43分钟焊接结束，然后它迅速增长约15分钟，并继续以较慢的速度增长约24小时。在实验测量的剩余72小时内未观察到显著生长。
This investigation introduces two new techniques to quantitatively address the challenging problem of understanding Hydrogen Induced Cracking (HIC) in welding processes. The first technique is a novel procedure to create a known and controlled HIC in a welded sample. The second is an in-process monitoring technique to measure the initial formation and subsequent growth of the HIC in a multi-pass weld whilst being compatible with the high temperatures associated with the welding process. The HIC was initiated using a localised quenching method of the weld and its character was verified using both macrograph and microscopic investigations. During HIC initiation and growth, the sample was monitored every 1-30 min for a total of 96 h using a custom non-destructive testing (NDT) system, mounted on a robot which ensured repeatable inspection positioning. Combining these techniques has therefore allowed for the first time, a detailed understanding of the evolution of HIC in a multi-pass welded sample. Our findings reveal that the HIC was initiated 43 min after the weld ended and that it then grew rapidly for about 15 min and continued growing at a slower rate for around 24 h. No significant growth was observed for the remaining 72 h of the experimental measurement.