Method of determining the delayed fracture susceptibility of steel under the simultaneous effect of hydrogen and mechanical stresses

Journal Article · Sun Feb 01 04:00:00 EST 1987 · Ind. Lab. (Engl. Transl.); (United States)

OSTI ID:6293144

Mishin, V M; Beresnev, A G; Sarrak, V I

The delayed fracture test is one of the most informative methods for evaluating the hydrogen embrittlement susceptibility of structural steels. However, in the majority of cases, delayed fracture tests under the simultaneous effect of the metal of mechanical stresses and a hydrogen-containing medium are carried out using methods which make it possible to obtain only the qualitative characteristics of the susceptibility to hydrogen embrittlement. The methods proposed by the authors in this paper include the mechanical tests of delayed fracture of the specimens, simultaneous saturation of the specimens with hydrogen, calculation of the maximum local tensile stresses ahead of the stress raiser, and determining the threshold value of these stresses below which no crack initiation takes place. The authors also propose a variation on the equipment with the following advantages: the specimen is loaded by pure bending to determine the elastic stress concentration factors required for calculating the maximum local tensile stresses; the intensity of the action of the working medium can be easily varied by the application of various electrolytes and cathodic current densities.

• Research Organization: I.P. Bardin central Scientific-Research Institute of Ferrous Metallurgy, Moscow, USSR
• OSTI ID: 6293144
• Journal Information: Ind. Lab. (Engl. Transl.); (United States), Journal Name: Ind. Lab. (Engl. Transl.); (United States) Vol. 52:8; ISSN INDLA
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360103 -- Metals & Alloys-- Mechanical Properties
360105* -- Metals & Alloys-- Corrosion & Erosion
ALLOYS
CHROMIUM ALLOYS
CHROMIUM STEELS
CORROSIVE EFFECTS
CRACK PROPAGATION
DESTRUCTIVE TESTING
ELEMENTS
EMBRITTLEMENT
FRACTURE PROPERTIES
HYDROGEN
HYDROGEN COMPOUNDS
HYDROGEN EMBRITTLEMENT
INORGANIC ACIDS
IRON ALLOYS
IRON BASE ALLOYS
MATERIALS TESTING
MECHANICAL PROPERTIES
MECHANICAL TESTS
NONMETALS
RELAXATION
STEELS
STRESS ANALYSIS
STRESS INTENSITY FACTORS
STRESS RELAXATION
STRESSES
SULFURIC ACID
TENSILE PROPERTIES
TEST FACILITIES
TESTING