Nature of hydrogen embrittlement of steel
The hydrogen embrittlement of metals is the result of the origin and development of microcracks, which are formed as the result of the occurence of internal stresses. The specific feature of the appearance of hydrogen embrittlement are the result of the physical properties of the metals and the character of their interaction with hydrogen. The tendency of metals toward hydrogen embrittlement is determined by the following characteristics: their capacity to dissolve hydrogen and its maximum solubility; the chemical activity of the metals and other phases in relation to hydrogen, that is, the capacity toward hydride formation and failure of the carbided sand oxides, and the tendency of the metal toward the occurence and propagation of cracks. The authors cite and discuss two general forms of action of hydrogen on metals, the physical action of hydrogen on metals and the physicochemical action when chemical interaction of hydrogen with the different phases and the individual components of the alloy on the surface and in the volume occurs. The tendency toward hydrogen embrittlement is shown to increase with an increase in the strength of the steel. In addition to the strength, this characteristic also depends upon the chemical composition and structural condition of the steel.
- Research Organization:
- All-Union Scientific-Research Institute for Petrochemical Processes
- OSTI ID:
- 5535372
- Journal Information:
- Met. Sci. Heat Treat. Met. (Engl. Transl.); (United States), Vol. 27:7-8
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
STEELS
HYDROGEN EMBRITTLEMENT
CHEMISORPTION
CHROMIUM ALLOYS
CRACK PROPAGATION
DECARBURIZATION
DESTRUCTIVE TESTING
DUCTILE-BRITTLE TRANSITIONS
FAILURES
HYDRIDATION
HYDROGEN
MECHANICAL PROPERTIES
METALLURGICAL EFFECTS
MOLYBDENUM ALLOYS
STRESS CORROSION
TITANIUM ALLOYS
VANADIUM ALLOYS
ALLOYS
CHEMICAL REACTIONS
CORROSION
ELEMENTS
EMBRITTLEMENT
IRON ALLOYS
IRON BASE ALLOYS
MATERIALS TESTING
NONMETALS
SEPARATION PROCESSES
SORPTION
TESTING
360103* - Metals & Alloys- Mechanical Properties