Method for determining the hardness of strain hardening articles

Details Method for determining the hardness of strain hardening articles Method for determining the hardness of strain hardening articles

1981-07-29

1984-11-06

Strecker, Gerard R.

Electricity: measuring and testing

Magnetic

With means to create magnetic field to test material

324209, G01R 3312, G01N 2772

Patent

active

044814704

ABSTRACT:
The present invention is directed to a rapid nondestructive method for determining the extent of strain hardening in an article of tungsten-nickel-iron alloy. The method comprises saturating the article with a magnetic field from a permanent magnet, measuring the magnetic flux emanating from the article, comparing the measurements of the magnetic flux emanating from the article with measured magnetic fluxes from similarly shaped standards of the alloy with known amounts of strain hardening to determine the hardness.

REFERENCES:
patent: 3739261 (1973-06-01), Renkin, Jr.
patent: 3980947 (1976-09-01), Bielsten et al.
patent: 4126491 (1978-11-01), Karlsson
patent: 4207519 (1980-06-01), Zatsepin et al.
patent: 4279163 (1981-07-01), Takekoshi et al.

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