Consolidation of Pure Magnesium Powder by Equal-Channel Angular Pressing with Back Pressure
Zhuoliang Li, Kenong Xia, Hua Ding
JOURNAL OF MATERIALS ENGINEERING AND PERFORMANCE | SPRINGER | Published : 2021
Pure Mg particles were consolidated by equal-channel angular pressing (ECAP) with back pressure at 423 K. Fully dense bulk Mg with a homogeneous grain structure was obtained. After multiple passes, grains were significantly refined to below 2 µm, resulting in much enhanced yield strength and enhanced ductility. The intense (10 1 - 1 ) ⟨ 1 - 2 1 - 0 ⟩ texture was developed during ECAP, leading to texture softening. The oxide layer on the surface of Mg particles was broken into nano-sized pieces distributed in the matrix, hindering the movement of dislocations and providing dispersion strengthening.