The Effects Of Nd Element And Heat Treatment On Structure And Properties Of AM60 And Mg-6Al Magnesium Alloys

Magnesium alloys are called green-engineering material and used widely to produce 3C,automobile products,aviation and spaceflight because of its low density, high strength,high specific strength and stiffness,superior damping capacity,good stabilization of the siaze,good electromagnetic shielding characteristics and good machinability.Research objects of this thesis aim at Mg-6Al magnesium alloy and AM60 magnesium alloy which are with neodymium element.It was investigated the large changes with the alloys of metallurgical structure,mechanical property,corrosive nature after appending neodymium element and the effects of heat treatment on structure and mechanical properties of AM60-xNd magnesium alloys and Mg-6Al-xNd magnesium alloys.Structure properties are of great changes of AM60 magnesium by adding neodymium.The results show that the structure is refined and netted Mg₁₇Al₁₂phase change to be dispersal and imtermittent.In the same time,it appears the new phase Al₁₁Nd₃ which are acicular.The mechanical properties obtain obvious improvement with the increase of neodymium;the metallurgical structure,the mechanical properties and the corrosive nature are the most when the content of neodymium is 1.2%.After solution treatment and aging treatment,the alloys capabilities have large changes and the strength increases 33MPa at the most.Structure properties are of great changes of Mg-6Al magnesium by adding neodymium.The results show that the structure is refined and netted Mg₁₇Al₁₂phase change to be dispersal and imtermittent.In the same time,it appears the new phase Al₁₁Nd₃ which are acicular.The mechanical properties obtain obvious improvement with the increase of neodymium;the metallurgical structure,the mechanical properties and the corrosive nature are the most when the content of neodymium is 1.2%.After solution treatment and aging treatment,the alloys capabilities have large changes.With solution treatment 50 hours,the tensile strength of Mg-6Al-xNd magnesium alloy has increased from 220MPa to 232MPa.