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

Volume

47

Issue

5

fYear

1998

fDate

10/1/1998 12:00:00 AM

Firstpage

1367

Lastpage

1371

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;

fLanguage

English

Journal_Title

Instrumentation and Measurement, IEEE Transactions on

Publisher

ieee

ISSN

0018-9456

Type

jour

DOI

10.1109/19.746612

Filename

746612