Microstructure stability of cold drawn AZ31 magnesium alloy during annealing process

Effect of annealing on the microstructures and properties of cold drawn Mg alloy wires

“…However, it is noteworthy that the recrystallization temperature of the experimental Mg alloys is significantly higher than that of AZ31 alloy (~200-300 o C) drawn whether by our current processing or that reported in Ref. [20] .This phenomenon was also observed in some other experiments on the dynamic recrystallization of RE containing Mg under different deformation processing [21][22][23] . Considering the near single-phase microstructure for AZ31 as well as in this case, 1# and 2# alloys, the solute driven effect must be a key factor to impact the recrystallization.…”

Preparation, microstructure and degradation performance of biomedical magnesium alloy fine wires

“…In order to obtain the optimum annealing process, for each alloy and deformation state, we respectively examined various annealing temperatures and time in the range of 400-450 1C and 5-30 min in according to the pre-experimental results. The annealing temperatures to achieve completely static recrystallization of Mg-RE alloys are much higher than that of cold drawn AZ31 alloy ($ 200-250 1C) [7,9], suggesting that RE solute can intensively retard the nucleation and growth of recrystallization. More detailed results about the microstructural evolution during drawing and annealing will be published elsewhere.…”

“…However, there are only few investigations on Mg fine wires reported so far [5][6][7][8][9][10]. First, due to the poor ductility of hcp magnesium at room temperature, the preparation of Mg alloy wire is much more difficult than that of traditional fcc and bcc metal wire (i.e.…”

“…For these researches [5][6][7][8][9][10] on Mg fine wires, most of the materials studied were AZ31 or AZ61 alloy based on the Mg-Al series. Although AZ alloys show good comprehensive mechanical properties and are now the most common commercial Mg alloy, many Al-free Mg alloys with better biological performance, for example Mg-RE (rear earth element) and Mg-Zn based alloys, have been extensively developed and investigated recently in vitro and in vivo as new degradable biomedical Mg alloys [1,[12][13][14][15][16][17].…”

Thermal stability of bimodal microstructure in magnesium alloy AZ91 processed by ECAP

“…In the literature, the critical values of stress and/or temperature in relation to detailed structure and property observations of many alloys are either not mapped at all or just marginally [19,24], sometimes the literature data are controversial [25,26].…”