Re: UT of resistance spot weld - and more topics have achieved results that correlated up to 95% with the destructive testing.
: Should that be able to work at Mr. Dolfi's plant as well?
: Any more comments are welcome.
: Another topic that I would be happy to discuss.
: On NDT NewsWeb we reviewed Jeff Phillips' last month NDT newsgroup topic 'Ultrasonic Examination of Butt Fused Welds in PE Pipe' http://www.ndt.net/newsweb/posts/pepipe.htm. Jeff Phillips summarized his results, unfortunately he did not get a lot of interest through the newsgroup.
: Can anybody help?
: Finally, more generally about the forum:
: The number of forum users rises strongly (more than 600 page hits each month). Also we have currently more than 150 registrations listed at http://www.ndt.net/wshop/wshop_pa.htm. The new participants' list provides now more information: Last name, First name, Work in or as .., Institution, E-mail, Country, and links to homepages. For any changes of the shown details please send correction to email@example.com.
: Do not hesitateto post messages to this forum. You must not be an expert, also your English must not be so good. Most people on the Internet don't speak English as first language. For instant I am a German and write with a lot of errors.
: So please, if you have any comments, questions or new topics - post it now!
: Best regards
: Rolf Diederichs
First, I'd like to echo the sentiments of others regarding Rlf's website: good work, and keep it up!
Secondly, I'd like briefly address some issues that were raised during testing of resistance spot welds using UT. In the course of testing, I arrived at a few basic guidelines that seemed to work well for testing fairly random spot welds; the details are shown on the accompanying web page, but they involve determining an initial gain setting for testing,
along with some minimal qualifications for distinguishing between weld states. With these very limited requirements, we got good reliability rates, which allowed room for further improvement. More importantly, I wanted to address guidelines for real-life weld shops, not research labs. And I think we did pretty good!
I hope that this article will soon be published in Materials Evaluation. Prior to that, I welcome any comments; you let me know what you think of this work. I look forward to establishing dialogues on this "perpetually unresolved" issue.
Thanks for listening,