Compressive creep behavior of Mg-4Al-1RE-1Ca-0.2Sr alloy

摘要：

　　The compressive creep behavior of Mg-4Al-1RE-1Ca-0.2Sr (AECJ411002) alloy was investigated at temperatures in the range of 125~175℃ and different compressive stress in the range of 88~112MPa with special apparatus.The results show that the creep deformation increases with the increasing of temperature and compressive stress.There is linear logarithmic relationship between the steady creep rote and all the temperature and stress used.The steady creep rate obeys an empirical equation.The stress exponents are similar at different temperatures and the appearance activation energies are not greatly different under different stresses.Their average value is respectively 6.19 and 39.05kJ/mol.Material constant A is 4.18×10-14.The steady creep rate is controlled by a dislocation climb led by grain boundary sliding.The creep resistance enhances because of the heat-resistant phases Al2Ca and Al4Sr distributing at grain boundary.

关键词： AECJ411002 alloy compressive creep stress exponent activation energy

作者: XU Dao-fen DU Chun-ping YE Dong

作者单位: Guilin University of Aerospace Technology,Guilin Guangxi 541104,China

会议类型: 国际会议

会议名称: the 3nd International Conference on Digital Manufacturing & Automation (第三届数字制造与自动化国际会议(ICDMA 2012))

会议地点: 桂林

会议语种:英文

页码: 431-434

在线出版日期: 2012-08-01（万方平台首次上网日期，不代表论文的发表时间）