The Basics of Non-Destructive Material Testing - Part 1
The Basics of Non-Destructive Material Testing - Part 1
4
haileyk (Materials)
(OP)
FYI, we just published an article on ENGINEERING.com based on a question at Eng-Tips Forums. I hope you enjoy it.
The Basics of Non-Destructive Material Testing - Part 1
The Basics of Non-Destructive Material Testing - Part 1
Quote:
Non-destructive testing methods test mechanical and other properties without permanently altering the subject, which saves time and money in product evaluation.
There are many companies that sell non-destructive machines to test material properties but they rarely explain how their methods work. Eng-Tips Forums member “afronova” posted the question, “Are there any good sites that inform about destructive and non-destructive material testing techniques?”
Well, afronova, there is now.
And so begins a three-part series on nine methods of non-destructive material testing. In part one, we discuss radiographic testing, ultrasonic testing and magnetic particle inspection....





RE: The Basics of Non-Destructive Material Testing - Part 1
After the basics of the nine NDI processes are covered, you might want to add more articles covering how to select the appropriate NDI process for different situations, the various process specs used in different industries, compliance and certification requirements for inspectors and equipment, economic/cost issues of selecting an NDI process, the relationship between NDI processes and engineering analysis used for certification, etc.
RE: The Basics of Non-Destructive Material Testing - Part 1
RE: The Basics of Non-Destructive Material Testing - Part 1
The Basics of Non-Destructive Testing - Part 2
RE: The Basics of Non-Destructive Material Testing - Part 1
Example photo of indication attached.
RE: The Basics of Non-Destructive Material Testing - Part 1
One thing I would suggest adding to the dye pen process step 1, is the importance of etching rough machined surfaces. This will remove any smeared material that may be covering a surface defect. A very thin layer of surface material will be removed during the etching process, so it will need to be compensated for on very close tolerance features.
RE: The Basics of Non-Destructive Material Testing - Part 1
RE: The Basics of Non-Destructive Material Testing - Part 1
The Basics of Non-Destructive Testing - Part 3
RE: The Basics of Non-Destructive Material Testing - Part 1
I have minor disagreement with the Pro/Con table for leak testing. I think the only test that is completely operator dependent is the bubble test, since that's purely an eyeballed test. The other three involve measurable quantities, and assuming that there is a correct calculation equation and parameters, the calculated leak rate should not be operator dependent.
TTFN
I can do absolutely anything. I'm an expert!
FAQ731-376: Eng-Tips.com Forum Policies forum1529: Translation Assistance for Engineers
RE: The Basics of Non-Destructive Material Testing - Part 1
RE: The Basics of Non-Destructive Material Testing - Part 1
TTFN
I can do absolutely anything. I'm an expert!
FAQ731-376: Eng-Tips.com Forum Policies forum1529: Translation Assistance for Engineers
RE: The Basics of Non-Destructive Material Testing - Part 1