Title :
Multiprobe impedance measurement system for nondestructive evaluation and test of “green state” powder metallurgy parts
Author :
Stander, Jennifer ; McNeill, John A. ; Ludwig, Reinhold
Author_Institution :
Quantum Corp., Shrewsbury, MA, USA
fDate :
10/1/1998 12:00:00 AM
Abstract :
This paper describes an instrument capable of detecting flaws in “green-state” (prior to sintering) powder metallurgy (P/M) parts. The instrument uses a matrix of impedance measurements from a multiprobe array that contacts the surface of the P/M part. The array of measured data is processed to not only detect the presence of flaws but determine their location, size, and orientation as well. Experimental results show detection of flaws ranging in size from 10-200 μm
Keywords :
electric impedance measurement; flaw detection; metallurgical industries; powder metallurgy; probes; 10 to 200 mum; NDE; flaw detection; flaw location; flaw orientation; flaw size; four-wire impedance test; green state powder metallurgy parts; impedance measurement matrix; multiprobe array; multiprobe impedance measurement system; nondestructive evaluation; nondestructive testing; Compaction; Impedance measurement; Inorganic materials; Instruments; Manufacturing processes; Nondestructive testing; Powders; Production; Size measurement; System testing;
Journal_Title :
Instrumentation and Measurement, IEEE Transactions on
