Microstructure evolution and mechanical properties of Mg-Gd-Sm-Zr alloys

Present Development Status of Anti-creep Magnesium Rare-Earth Alloys

“…In the process of high temperature creep, the role of solid solution strengthening mainly in the recovery process, can delay the recovery process, thereby reducing the creep rate of magnesium alloy. In the process of high temperature creep, the role of solid solution strengthening mainly in the recovery process, can delay the recovery process, thereby reducing the creep rate of magnesium alloy [20][21][22][23][24].…”

“…The interaction between precipitates and dislocations leads to the increase of the yield strength of the alloy. As the magnesium atoms larger, usually with the magnesium matrix formation of non-co-precipitated complex phase, the interface energy is high, easy to coarsen at high temperatures, it is difficult to effective grain boundary pinning role Therefore, the key to improve the creep resistance of magnesium alloy is to improve the crystal structure of the precipitation phase with the appropriate alloying elements to reduce the mismatch of the lattice constant with the magnesium matrix, to improve the precipitation mode and morphology of precipitated phase, Phase to reduce its diffusivity, so as to improve the creep properties of magnesium alloy [20][21][22][23][24].…”

“…It has high melting point, good thermal stability, little solubility in the matrix and dispersed in the grain boundaries and grains. It can effectively control the grain deformation, grain boundary sliding and dislocation movement, so it can be produced in the alloy Diffusion strengthening phase to improve the alloy in different temperature range of the ability to adapt to the alloy and the mechanical properties, especially magnesium alloy creep resistance [20][21][22][23].…”

“…The purpose of purification is to reduce the harmful impurities in the grain boundary of the segregation. Microalloying improves the thermal strength of the alloy by improving the shape and distribution of the second phase of the grain boundary and the organization of the region near the grain boundary by segregation of the microalloying element at the grain boundary [20][21][22][23][24].…”

Preparation of an Mg–Gd–Zn alloy semisolid slurry by low frequency electro-magnetic stirring

“…Mg-Gd-X (X = Y [1,2], Sm [3], Nd [4], Zn [5]) alloys have received considerable interest in recent years and been reported to have potential aerospace and automobile applications due to their enhanced mechanical properties. Among them, the Mg-Gd-Zn system shows superior tensile strength and creep resistance to the others by the formation of γ′ precipitates and long-period stacking ordered (LPSO) phase [5].…”