Abstract
Oxide Dispersion Strengthened (ODS) steels are suitable candidate material for clad tubes of future generation nuclear reactors. The high temperature mechanical and creep properties of these steels are dependent on the oxide particles’ shape, size, and orientation within the steel matrix. In the present research, an alloy having a composition of Fe-18Cr-0.3Ti-2W-0.5Y 2 O 3 (composition in wt.%) was prepared by mechanical alloying for seven hours in a high energy horizontal attritor mill. The mechanically alloyed powders were consolidated at 1473 K through powder forging. TEM images indicate that the forged steel has a recrystallized microstructure. In the presence of Ti, Yttria forms complex oxide particles within the ferrite matrix. Fine cuboidal and few coarse spherical nano oxides particles were found in the matrix. The distribution of these oxide particles was found to be uniform. The Forged ODS steel offered attractive mechanical properties at room temperature as well as a 773 K.
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