| || On Silicides in High Temperature Titanium Alloys
Author : Ramachandra, C.;Singh, Vakil;Rao, P.Rama
Source : Defence Science Journal ; Vol:36(2) ; 1986 ; pp 207-220
Subject : 669 Metallurgy
Keywords : Titanium alloys;IMI;Silicon bearing titanium
Abstract : High temperature titanium alloys like IMI 685 contain small amounts of silicon (equivalent 0.25 wt. per cent) to improve creep resistance. Different types of silicides, namely Ti/sub 5/Si/sub 3/ (TiZr)/sub 5 Si/sub 3 (S/sub 1/) and (TiZr)/sub 6/ Si/sub 3/ (S/sub 2/), have been observed to precipitate in various silicon-bearing titanium alloys depending upon their composition and heat treatment. The precipitation of silicides, their orientation relationship with the matrix in different alloys, and the beneficial influence of thermo-mechanical treatment on the distribution of silicides have been silicides have been pointed out. The effect of silicides on mechanical properties and fracture of the commercial alloy IMI 685 is also indicated.