Accession Number : AD0658989

Title :   CERTAIN GENERAL PATTERNS IN THE OCCURRENCE OF HYDROGEN BRITTLENESS IN THE ALLOYS VT3-1 AND VT15,

Corporate Author : REDSTONE SCIENTIFIC INFORMATION CENTER REDSTONE ARSENAL ALA TRANSLATION BRANCH

Personal Author(s) : Kolachev,B. A. ; Livanov,V. A. ; Guselnikov,N. Ya. ; Bukhanova,A. A.

Report Date : JUL 1967

Pagination or Media Count : 20

Abstract : Discussed is the development of hydrogen brittleness in an (alpha + beta)-titanium alloy VT3-1 and a beta-titanium alloy VT15. It is shown that hydrogen brittleness develops most intensely in VT3-1 at temperatures less than room temperature and at low strain rates. It is discovered that beta-titanium alloys at temperatures below room temperature are also prone to hydrogen brittleness, the temperature at which this occurs decreasing with a decrease in the hydrogen content. Hydrogen brittleness in the alloy VT15 is found to occur only at low strain rates in a narrow temperature range, approximately from -30C to +10C. Hydrogen brittleness of (alpha + beta)-titanium alloys is believed to be caused by processes developing in the beta-phase during plastic deformation. Since the composition of the beta-phase of VT3-1 after isothermal annealing is close to the composition of the beta-phase of VT15, it is concluded that hydrogen brittleness develops in approximately the same manner in both of them, provided the conditions for mechanical testing are the same for both. (Author)

Descriptors :   (*HYDROGEN EMBRITTLEMENT, *TITANIUM ALLOYS), DEFORMATION, FRACTOGRAPHY, HYDRIDES, ANNEALING, TEMPERATURE, PLASTIC PROPERTIES, MECHANICAL PROPERTIES, USSR

Subject Categories : Metallurgy and Metallography

Distribution Statement : APPROVED FOR PUBLIC RELEASE