Method and device for measurement of environmental stress cracki

Details Method and device for measurement of environmental stress cracki Method and device for measurement of environmental stress cracki

1977-03-08

1978-08-22

Ciarlante, Anthony V.

Measuring and testing

Ductility or brittleness

73100, G01N 300, G01N 320

Patent

active

041079795

ABSTRACT:
Environmental stress cracking of a given material is measured by a method comprising the steps of deforming a test piece of said material for thereby producing stress therein, placing the deformed test piece in a test environment, externally applying thereto stress of a magnitude smaller than that of the stress already produced therein until the test piece fractures and clocking the time the test piece stands in said test environment before fracturing. Said measurement is performed by use of a device which comprises means for holding test pieces, loading means for applying stress to said test piece holding means and indicating the displacement of the test piece occurring at the time of its fracture and means for sensing the displacement.

REFERENCES:
patent: 1499546 (1924-07-01), Oxley
patent: 2452588 (1948-11-01), McFarland
patent: 2506048 (1950-05-01), VAN DEN Akker
patent: 2670624 (1954-03-01), Faris et al.
patent: 3440868 (1969-04-01), Boyles
patent: 3538757 (1970-11-01), Osborne

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