Method of determining the deterioration of heat-resistant ferrit

Details Method of determining the deterioration of heat-resistant ferrit Method of determining the deterioration of heat-resistant ferrit

1980-01-28

1981-09-01

Anderson, Bruce C.

Radiant energy

Inspection of solids or liquids by charged particles

Methods

G01N 2300

Patent

active

042874173

ABSTRACT:
A method of determining the degree of deterioration of a heat-resistant ferritic steel part, such as that of Cr-Mo-V steel practically applied in a region of high temperature from at least one of the crystallization factors such as the particle size, interparticle distance and crystallization density of a carbide, particularly V.sub.4 C.sub.3 crystallized out in said ferritic steel part.

REFERENCES:
patent: 2613326 (1952-10-01), Herzog
Williams et al., "Effects of Microstructural Instability of the Creep and Fracture Behaviour of Ferric Steels", Material Science & Engineering, vol. 28, pp. 289-295, (1977).
Prnka et al., "Effect of Carbide Repartition on the Creep Rupture Strength of Low Alloy Cr-Mo-V Steels", Arch. Eisenhuttenwes, vol. 44, No. 4, Apr. 1973, p. 321.
"A Rapid Method of Obtaining Electron Microscope Contrast Maps of Various Lattice Defects", Tholen, Phil. Mag., vol. 22, No. 175, Jul. 1970, pp. 175-182, 250-307.

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