A new apparatus for non-destructive evaluation of green-state powder metal compacts using the electrical-resistivity method

Measurement Science and Technology

Volumn 11, Issue 2, 2000, Pages 157-166

  Bogdanov, Gene ^a   Ludwig, Reinhold ^a   Michalson, William R ^a  

^a Worcester Polytechnic Institute   (United States)

Author keywords

Array sensor; Green state powder metallurgy compacts; Instrumentation; Nondestructive evaluation; Resistivity testing

Indexed keywords

ALGORITHMS; DEFECTS; ELECTRIC CONDUCTIVITY OF SOLIDS; ELECTRIC POTENTIAL; POWDER METAL PRODUCTS; SENSORS; SINTERING;

GREEN-STATE POWDER METAL COMPACTS;

NONDESTRUCTIVE EXAMINATION;

EID: 0033687090     PISSN: 09570233     EISSN: None     Source Type: Journal    
DOI: 10.1088/0957-0233/11/2/308     Document Type: Article

References (13)

1. German R M 1994 Powder Metallurgy Science (Princeton, NJ: Metal Powder Industries Federation)
2. Klar E (ed) 1983 Powder Metallurgy: Applications. Advantages and Limitations (Metals Park, OH: American Society for Metals)
3. Zenger D and Cai H 1996 The Common Cracks in Green P/M Compacts Handbook (Worcester, MA: Powder Metallurgy Research Center, Worcester Polytechnic Institute)
4. Ludwig R, Zenger D and Zhang R 1995 Review of various non-destructive testing methods for detecting cracks in green P/M components Report (Worcester, MA: Carl Gunnard Johnson Powder Metallurgy Research Center, Worcester Polytechnic Institute)
5. Lewis A and Bush D 1991 Resistivity measurement for evaluation of coating thickness Mater. Evaluation 49 1231-9
6. Frise P R and Bell R 1992 Improved probe array for ACPD crack measurements Br. J. Non-dest. Testing 34 15-19
7. Berry M D, Brisker H C and Cuneo A A 1989 USA Patent 4888546
8. Witt G C 1992 USA Patent 5136252
9. Runyan W R 1975 Semiconductor Measurements and Instrumentation (New York: McGraw-Hill)
10. Ludwig R, Makarov S and Apelian D 1998 Theoretical and practical investigations of electric resistivity testing of green-state P/M compacts J. Nondest. Evaluation 17 153-66
11. Slander J G 1996 A non-destructive evaluation method for 'green' powder metal parts using electrical impedance M.S. Thesis. (Worcester, MA: Department of Electrical and Computer Engineering, Worcester Polytechnic Institute)
12. Bogdanov G 1999 Theoretical basis and practical implementation of electrical impedance material inspection of powder metallurgy compacts M.S. Thesis (Worcester, MA: Department of Electrical and Computer Engineering, Worcester Polytechnic Institute)
13. Ikeda K, Yoshimi M and Miki C 1991 Electric potential drop method for evaluating crack depth Int. J. Fracture 47 25-38