Study of the mechanical properties of Mg-7.7at.% Al by in-situ neutron diffraction

Internal stresses in tension and compression in an extruded and artificially aged Mg-7.7at.% Al alloy have been determined by in-situ neutron diffraction. Measurements were made on grains having the c axis normal to, parallel to and at 62° from the stress axis, and on the reinforcing phase. The results are consistent with basal slip and {1012} twinning. The second-phase particles of Mg17Al12 bear much higher stresses than the magnesium matrix …