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Technical Discussions
muhammad aizat
muhammad aizat
04:45 Sep-23-2015
problem statement

im newbie in using ultrasonic equipment.

title: measure of defect sizing on single butt weld using ultrasonic testing

can you guys explain what problem statement for this title?

2
 
 Reply 
 
Paul Holloway
Consultant,
Holloway NDT & Engineering Inc , Canada, Joined Apr 2010, 218

Paul Holloway

Consultant,
Holloway NDT & Engineering Inc ,
Canada,
Joined Apr 2010
218
14:06 Sep-23-2015
Re: problem statement
In Reply to muhammad aizat at 04:45 Sep-23-2015 (Opening).

I think you're going to have to rephrase your question.

Are you referring to the title of a published paper?

Are you trying to trying to perform defect sizing for the first time yourself? In that case, I hope this is in a lab/garage, and not work for a client.

2
 
 Reply 
 
muhammad aizat
Student,
full time student, Malaysia, Joined Sep 2015, 3

muhammad aizat

Student,
full time student,
Malaysia,
Joined Sep 2015
3
17:12 Sep-25-2015
Re: problem statement
In Reply to Paul Holloway at 14:06 Sep-23-2015 .

hello,

Mr Paul holloway

I am a final years student, my final year project is about " of defect sizing on single butt weld using ultrasonic testing. My lecture only provide "defect sizing" only.

So I need help on finding the problem statement for this project, any suggestion or ideas?


1
 
 Reply 
 
Tom Nelligan
Engineering,
retired, USA, Joined Nov 1998, 390

Tom Nelligan

Engineering,
retired,
USA,
Joined Nov 1998
390
19:18 Sep-25-2015
Re: problem statement
In Reply to muhammad aizat at 17:12 Sep-25-2015 .

I may not understand your question correctly, but if you are looking for a quick summary of common sizing techniques, see Section 8 of our ultrasonic flaw detection tutorial:

http://www.olympus-ims.com/en/ndt-tutorials/flaw-detection/

2
 
 Reply 
 
Ed Ginzel
R & D, -
Materials Research Institute, Canada, Joined Nov 1998, 1286

Ed Ginzel

R & D, -
Materials Research Institute,
Canada,
Joined Nov 1998
1286
00:10 Sep-26-2015
Re: problem statement
In Reply to muhammad aizat at 17:12 Sep-25-2015 .

Muhammad, I think it is the wording you are using that has us confused. What do you mean by needing a "problem statement"? Are you looking for options or solutions? Or are you looking for some sort of "statement" as to what will best apply to a particular setup you are using.
If you are a final year student (in a multi-year NDT programme?) I do not think you are a complete Newbie so you must have some idea of what your instructor has requested.
Chapters 8 and 9 in the reference provided by Mr. Nelligan provide a good summary of the main options used in industry. You will need to assess the option best suited for your application by comparing the expectations of your instructor and the imposed demands for any codes or standards that they referenced.

2
 
 Reply 
 
Irfan
NDT Inspector,
Malaysia, Joined Mar 2015, 10

Irfan

NDT Inspector,
Malaysia,
Joined Mar 2015
10
09:15 Sep-30-2015
Re: problem statement
In Reply to Ed Ginzel at 00:10 Sep-26-2015 .


He is probably looking for the relationship between his syllabus content which only described the 'defect sizing' topic in general and how does the topic relevant to his final year assignment topic - "Defect Sizing On Single Butt Weld Using Ultrasonic Testing.(which sound more specific to on site application).

2
 
 Reply 
 
Nigel Armstrong
Engineering, - Specialist services
United Kingdom, Joined Oct 2000, 1096

Nigel Armstrong

Engineering, - Specialist services
United Kingdom,
Joined Oct 2000
1096
17:08 Sep-30-2015
Re: problem statement
In Reply to Irfan at 09:15 Sep-30-2015 .

Do you mean "single-vee butt weld" as this would specify the configuration to contend with?

And is it manual conventional, phased array. TOFD or AUT?

The key to knowing your measurement capabilities is to understand your measuring equipment, the knowledge and skill of the person using that equipment and the accuracy limitations of the chosen measuring method. Much has been written and many claims made about this topic.

Restricting the query to manual UT with single element probe then there are many posts on this site and on the web dealing with how to minimise both length and height sizing errors using methods such as 20 dB (or any other values you choose to plot) drop, max amp. It seems modern NDT / UT training schools are unlikely to teach beam plotting and the capabilities or lack of to properly size a detected defect.

An excellent primer is J D Drury's Ultrasonic Flaw Detection for Technicians available from the BINDT web site.

1
 
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