Accession Number : ADA195909

Title :   Hydrogen Embrittlement of Iron-Nickel Alloys.

Descriptive Note : Technical rept.,

Corporate Author : ILLINOIS UNIV AT URBANA DEPT OF MATERIALS SCIENCE AND ENGINEERING

Personal Author(s) : Chu, W Y ; Birnbaum, H K

PDF Url : ADA195909

Report Date : Apr 1988

Pagination or Media Count : 23

Abstract : In many alloy systems, hydrogen embrittlement under relatively high fugacity conditions occurs by intergranular fracture. One of these is the iron nickel alloy system which exhibits intergranular hydrogen related fracture when tested with a high supersaturation of solute hydrogen or while being cathodically charged with hydrogen. The results obtained on this alloy system indicate that the hydrogen embrittlement susceptibility decreases as the iron concentration of the alloy increased. These early measurements contained no information about the grain boundary chemistry and it is known that the effects of hydrogen are generally sensitive to the concentrations of other elements at grain boundaries. One particular element, sulphur, is known to increase the susceptibility of nickel alloys and fe alloys to hydrogen embrittlement although the mechanism of this increased susceptibility is not known. (JES)

Descriptors :   *HYDROGEN EMBRITTLEMENT, *IRON ALLOYS, *NICKEL ALLOYS, ALLOYS, ELECTROMAGNETIC SUSCEPTIBILITY, GRAIN BOUNDARIES, MEASUREMENT, SULFUR, SUPERSATURATION, ALLOYS, CHEMISTRY, ELECTROMAGNETIC SUSCEPTIBILITY, EMBRITTLEMENT, GRAIN BOUNDARIES, HYDROGEN, HYDROGEN EMBRITTLEMENT, IRON ALLOYS, MEASUREMENT, NICKEL ALLOYS, SOLUTES, SULFUR, SUPERSATURATION

Subject Categories : Properties of Metals and Alloys

Distribution Statement : APPROVED FOR PUBLIC RELEASE