Effect of erbium on homogenization in an Al-Cu-Mg alloy
Effect of rare-earth erbium addition on homogenization in an Al-Cu-Mg alloy has been systematically evaluated by employing optical microscopy (OM), scanning electron microscopy (SEM), differential scanning calorimeter (DSC), electron probe microanalysis (EPMA) and X-ray diffraction (XRD).The microstructures of the as-cast Al-Cu-Mg-Er alloy are identified as Al2Cu phase (θ phase), Al2CuMg phase (S phase) and Al8Cu4Er phase.There is nearly no change for the ternary Al8Cu4Er phase during the homogenization treatment heated at 480℃.The phase transformation from primary lamellar eutectic structure (θ and S phases) to round shape S phase is detected, and the ripening and coalescence occur on the S phase.In addition, the overburnt temperature of the Al-Cu-Mg-Er alloy is 490℃ and the suitable homogenization treatment is 480℃ x 36h, which is good consistent with the results of homogenizing kinetic analysis.
Erbium Al8Cu4Er phase Al2CuMg phase Homogenization Kinetic equation
Xu Chen Sudan Zhai Di Gao Jing Xu
Key Laboratory of Materials Design and Preparation Technology of Hunan Province, Xiangtan University Key Laboratory of Materials Design and Preparation Technology of Hunan Province, Xiangtan University Guangdong Provincial Key Laboratory for Technology and Application of Metal Toughening, Guangdong In
国内会议
广州
英文
108-113
2017-03-29（万方平台首次上网日期，不代表论文的发表时间）