Microstructure and Strengthening Mechanism of Oxide Lanthanum Dispersion Strengthened Molybdenum Alloy

The strength of molybdenum alloys dispersed by different mass fraction oxide lanthanum particles has been determined at room temperature and related to the microstructure. It was found that fine oxide lanthanum particles incur a fine grain size and contribute much to the alloys strength. The quantitative relationships between the strengths of the alloys and the sizes, volume fraction of oxide lanthanum particles and the grain sizes were presented.