The embrittlement of Sn-Al eutectic alloy in water vapour
- 36 Downloads
The present paper is concerned with the study of strength and structural properties of phase boundaries of eutectic alloy becoming brittle after having been exposed to damp air. Interfaces of solid phase joints of tin with aluminium served as simple phase boundary models for this system. It was found (by SIMS technique) that alloy brittleness is caused by chemical absorption of hydrogen on phase boundaries, which leads to the damage of phase adhesion. The chemical absorption of hydrogen increases due to microdiscontinuities present on phase boundaries. Wetting tests and the results on kinetics of embrittlement show that the effect is a nonreversible one and is associated with the formation of hydrides. The mechanism of embrittlement is discussed in terms of the thermodynamic characteristics of the system investigated.
KeywordsHydrogen Polymer Aluminium Brittle Water Vapour
Unable to display preview. Download preview PDF.
- 1.G. V. Samsonov (ed), “The Properties of Elements Handbook” (Metallurgija, Moscow, 1970) p. 806.Google Scholar
- 2.G. M. Scamans, R. Alani andP. R. Swann,Corros. Sci. 16 (1976) 443.Google Scholar
- 3.G. M. Scamans,J. Mater. Sci. 13 (1978) 27.Google Scholar
- 4.M. A. Vasilyev andF. O. Muktepavel,Metallophysics 71 (1978) 12.Google Scholar
- 5.G. P. Upit andF. O. Muktepavel,Izv. Acad. Nauk Latv. SSSR Ser. Fiz. Tek. Nauk 4 (1978) 43.Google Scholar
- 6.V. T. Cherepin andM. A. Vasilyev, “Secondary Ion-Ion Emission of Metals and Alloys” (Naukova Dumka, Kiev, 1975) p. 237.Google Scholar
- 7.F. Winter andW. Gruhl,Metall. 31 (1977) 595.Google Scholar
- 8.J. M. Bernstein,Met. Trans. 1 (1970) 3143.Google Scholar
- 9.M. Kh. Karapetyants andM. Z. Karapefyants, “Basis Thermodynamic Constants of Inorganic and Organic Matters” (Khimiya, Moscow, 1968) p. 467.Google Scholar