where expertise comes together - since 1996 -

The Largest Open Access Portal of Nondestructive Testing (NDT)

Conference Proceedings, Articles, News, Exhibition, Forum, Network and more

where expertise comes together
- since 1996 -

IDEKO S.Coop
We provide Precision, Quality, Reliability and Productivity in manufacturing processes among our knowledge of Inspection and measurement technologies

880 views
Technical Discussions
AZIZ U. REHMAN
R & D
Quaid-e-Azam University, Islamabad, Pakistan, Joined Apr 2001, 11

AZIZ U. REHMAN

R & D
Quaid-e-Azam University, Islamabad,
Pakistan,
Joined Apr 2001
11
07:44 Jul-12-2001
Stable Solid Material in terms of Velocities over a range of temeprature


Does any one know about a Solid or a mixture of solid material that is stable in terms of Ultrasonic Velocities over a range of Temperatures from Room Temp. to about 70 Deg. C.

Thanking you in anticipation.


    
 
 
Ed Ginzel
R & D, -
Materials Research Institute, Canada, Joined Nov 1998, 1219

Ed Ginzel

R & D, -
Materials Research Institute,
Canada,
Joined Nov 1998
1219
00:16 Jul-12-2001
Re: Stable Solid Material in terms of Velocities over a range of temeprature
I suppose that by stable you mean that the velocity does not change (much).
Most materials will change, some more than others; however,
steel (and other metals) has a relatvely low dV/dT
on the order of less than a meter per sec per degree C
(typically 0.01%).
e.g. shear wave in steel has a dV/dT of about 0.3m/s/°C

:
: Does any one know about a Solid or a mixture of solid material that is stable in terms of Ultrasonic Velocities over a range of Temperatures from Room Temp. to about 70 Deg. C.
.
: Thanking you in anticipation.
.



    
 
 
Bruce Maxfield
Engineering, electronics and instrumentation
Analogic Engineering, Inc., USA, Joined Jan 2000, 10

Bruce Maxfield

Engineering, electronics and instrumentation
Analogic Engineering, Inc.,
USA,
Joined Jan 2000
10
02:05 Jul-12-2001
Re: Stable Solid Material in terms of Velocities over a range of temeprature
:
: Does any one know about a Solid or a mixture of solid material that is stable in terms of Ultrasonic Velocities over a range of Temperatures from Room Temp. to about 70 Deg. C.
.
: Thanking you in anticipation.
.
You might want to consider one of the common optical glasses like BK-7 or Zerodur as these are designed to have a very small thermal expansion coefficient near room temperature and this means a small l-wave velocity temperature coefficient.


    
 
 
AZIZ U. REHMAN
R & D
Quaid-e-Azam University, Islamabad, Pakistan, Joined Apr 2001, 11

AZIZ U. REHMAN

R & D
Quaid-e-Azam University, Islamabad,
Pakistan,
Joined Apr 2001
11
02:19 Jul-12-2001
Re: Stable Solid Material in terms of Velocities over a range of temeprature
Dear Sir ,

You are right, but need to have something with the velocities less than the shear velocity in Steel to have the shear mode generated inside steel, but staying stable inside the wedge (in terms of wedge velocity) even with the variation in temperature of the Wedge.

Can you have an idea.




    
 
 

Product Spotlight

Ultrasonic Flaw Detector & Thickness Gauge: Smartor

SIUI’s newly launched Smartor is a combination of ultrasonic testing and ultrasonic thickness me
...
asurement. ●IP 66 ●Compact size: 198 (W)* 128 (H) *520 (D) mm ●0.9kg only with battery ●5.7" LCD with high resolution 640×480 pixels ●One-hand operation ●Multiple conventional UT functions ●Smart Test Wizard ●Weld Simulation
>

FAAST-PA! OEM Patented phased Array for high speed UT inspection

Multiangle, Multifocus, Multifrequency, Multibeam. Instead of stacking UT electronics and having m
...
any PA probes, FAAST-PA is able to transmit all delay laws within ONE single shot in Real time.
>

Immersion systems

ScanMaster ultrasonic immersion systems are designed for high throughput, multi shift operation in a
...
n industrial or lab environment. These fully integrated systems provide various scanning configurations and incorporate conventional and phased arrays technologies to support diverse applications, such as inspection of disks, bars, shafts, billets and plates. All of ScanMaster immersion systems are built from high accuracy scanning frames allowing for scanning of complex parts and include a multi-channel ultrasonic instrument with exceptional performance. The systems are approved by all major manufacturers for C-scan inspection of jet engine forged discs. Together with a comprehensive set of software modules these flexible series of systems provide the customer with the best price performance solutions.
>

IntraPhase Athena Phased Array System

The Athena Phased Array system, manufactured by WesDyne NDE Products & Technology, consists of a pha
...
sed array acquisition system and PC running IntraSpect software. A PC is used to perform acquisition, analysis and storage of the data. System hardware is capable of operating up to four data sets with any combination of phased array or conventional UT probes. NOW AVAILABLE IN 64-64 CONFIGURATION.
>

Share...
We use technical and analytics cookies to ensure that we will give you the best experience of our website - More Info
Accept
top
this is debug window
s