Abstract
An oxide dispersion strengthened ferritic-martensitic steel with yttrium oxide (Y 2O 3) was produced by mechanical alloying and hot isostatic pressing techniques for high-performance structures of fusion energy devices. The structure of the nanometer-sized Y 2O 3 particles analysed by HRTEM shows a strong correlation of its crystallographic orientation with the alloy lattice. The orientation correlations [1 1 0] YO∥[1 1 1] FeCr and (1 1 ̄ 1 ̄ ) YO ∥(1 1 ̄ 0) FeCr were found. The strong orientation correlation appears during HIPing processes around 1050°C, which is significantly lower than the melting temperature of Y 2O 3 that amounts to 2500°C.
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