摘要
Microstructures and tensile properties of Mg-6Zn-IY-1Ce alloy extruded in a temperature range between 300 ℃ and 400 ℃ were investigated. The yield strength of the material increased as the extrusion temperature decreased due to grain refinement. The yield strengths and grain sizes of extruded samples met Hall-Petch equation. The microstructure of the alloy extruded at 300 ℃ had a bimodal grain size distribution with an average grain size of 2.7 μm and showed a yield strength of 327 MPa with an elongation of 9%. The fine-grained microstructures were attributed to the dynamic recrystallization and the pinning effect of fine strengthening particles.
Microstructures and tensile properties of Mg-6Zn-IY-1Ce alloy extruded in a temperature range between 300 ℃ and 400 ℃ were investigated. The yield strength of the material increased as the extrusion temperature decreased due to grain refinement. The yield strengths and grain sizes of extruded samples met Hall-Petch equation. The microstructure of the alloy extruded at 300 ℃ had a bimodal grain size distribution with an average grain size of 2.7 μm and showed a yield strength of 327 MPa with an elongation of 9%. The fine-grained microstructures were attributed to the dynamic recrystallization and the pinning effect of fine strengthening particles.
基金
Funded by the National Natural Science Foundation of China(No.50271054)
the Ph D Programs Foundation of Ministry of Education of China(No.20070700003)
the Science and Technologies Foundation of Henan of China(No.102102210031)
the Natural Science Foundation of Henan Educational Committee of China(No.2010A430008)