S. Morozumi et al., STRUCTURE AND MECHANICAL-PROPERTIES OF INTERNALLY HYDRIDED MG-IIIA TRANSITION-METAL ALLOYS, Journal of Materials Science, 31(17), 1996, pp. 4647-4654
Magnesium alloys containing IIIa transition metals, such as Sc, Y and
Ho, respectively, were hydrogenated at 773 K and examined for microstr
ucture, X-ray diffraction pattern, micro-Vickers hardness, and tensile
properties at room and high temperatures. Results obtained are as fol
lows: 1. The alloys, respectively, have been internally hydrided and h
ave precipitated hydrides of the IIIa transition metals as small flake
-like particles in the matrix and at grain boundaries, as well as twin
boundaries. 2. The dispersed hydride particles do not necessarily con
tribute to further hardening of the alloys at room temperature and up
to near 673 K. 3. However, the dispersed particles are very stable and
seem to improve mechanical properties of the alloys above 673 K. 4. P
resumed relationships of crystallographic coincidence between the matr
ix and hydrides have been obtained.