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Technical Discussions
XIAO WEI
Engineering,
UniSA, Singapore, Joined Jun 2018, 10

XIAO WEI

Engineering,
UniSA,
Singapore,
Joined Jun 2018
10
17:00 Jun-24-2018
UT QUESTION

When using a focused, straight beam search unit for lamination scanning in an immersion test of a steel plate, a change in water path of 0.2 in, will result in the focal point moving in the steel a distance of?
Pls provide steps and answer, thanks.

 
 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
19:49 Jun-24-2018
Re: UT QUESTION
In Reply to XIAO WEI at 17:00 Jun-24-2018 (Opening).

This sounds like a classroom assignment question. Odd you should ask about a 0.2 inch change.
I do not recall the imperial units being used in Singapore when I visited some years ago. In fact, we read that the official conversion to metric occurred in 1981 in Singapore.
Instead of others working through the step by step equations for you, I suggest you go to the ultrasonic basics seen in Technical Notes (https://mbi-ctac.sites.medinfo.ufl.edu/files/2017/02/ultrasound-basics.pdf) and solve for yourself the equation #13 on page 45.

 
 Reply 
 
Anmol Birring
Consultant,
Birring NDE Center, Inc., USA, Joined Aug 2011, 785

Anmol Birring

Consultant,
Birring NDE Center, Inc.,
USA,
Joined Aug 2011
785
22:19 Jun-24-2018
Re: UT QUESTION
In Reply to XIAO WEI at 17:00 Jun-24-2018 (Opening).

0.05 inch

 
 Reply 
 
ASHOK KUMAR PATRA
,
Saudi K-KEM Engineering service co, Saudi Arabia, Joined May 2018, 54

ASHOK KUMAR PATRA

,
Saudi K-KEM Engineering service co,
Saudi Arabia,
Joined May 2018
54
15:23 Jun-25-2018
Re: UT QUESTION
In Reply to XIAO WEI at 17:00 Jun-24-2018 (Opening).

0.2/4=0.05 inch Ans

 
 Reply 
 
Xiao Wei
Engineering,
UniSA, Singapore, Joined Jun 2018, 10

Xiao Wei

Engineering,
UniSA,
Singapore,
Joined Jun 2018
10
15:45 Jun-25-2018
Re: UT QUESTION
In Reply to ASHOK KUMAR PATRA at 15:23 Jun-25-2018 .

Hi Ashok, where does 4 come from?

 
 Reply 
 
Michel Couture
NDT Inspector,
consultant, Canada, Joined Sep 2006, 869

Michel Couture

NDT Inspector,
consultant,
Canada,
Joined Sep 2006
869
21:26 Jun-25-2018
Re: UT QUESTION
In Reply to Ed Ginzel at 19:49 Jun-24-2018 .

Ed, I bow to you my friend. You are a wise teacher.

To bad our young technicians do not see the value of such exercise. The Orient has changed very much.

 
 Reply 
 
ASHOK KUMAR PATRA
,
Saudi K-KEM Engineering service co, Saudi Arabia, Joined May 2018, 54

ASHOK KUMAR PATRA

,
Saudi K-KEM Engineering service co,
Saudi Arabia,
Joined May 2018
54
10:23 Jun-27-2018
Re: UT QUESTION
In Reply to Xiao Wei at 15:45 Jun-25-2018 .

The velocity of sound in steel /velocity of sound in water= 4

 
 Reply 
 
Xiao Wei
Engineering,
UniSA, Singapore, Joined Jun 2018, 10

Xiao Wei

Engineering,
UniSA,
Singapore,
Joined Jun 2018
10
17:08 Jun-27-2018
Re: UT QUESTION
In Reply to ASHOK KUMAR PATRA at 10:23 Jun-27-2018 .

Ashok, thanks, I use formula that Ed referred to calculate, result is same to yours. 0.2/(Ctm/Cw)

 
 Reply 
 

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