Jian Meng, Qiang Yang, Xin Qiu, Tian Zheng, Kai Guan, Fanqiang Bu and Deping Zhang
Changchun Institute of Applied Chemistry, China
ScientificTracks Abstracts: Res. Rev. J Mat. Sci
There exists a threshold stress identified as 38 MPa through the commonly adopted threshold stress approach in the studied alloy and the true stress exponent n and the activation energy Q are approximately 7 and 217 kJ/mol, respectively, under stresses of 75-110 MPa and at temperatures of 185-215oC. After creep, no discernible changes were observed on components, shapes, sizes, and distributions of the dominant phases identified as Al11RE3 and C36, and also the grain sizes, except that the lattice parameters of the C36 phase were decreased and numerous C15 particles precipitated in the grain interior during creep deformation. Under relatively lower stresses, the operative creep mechanism is cross-slip of dislocations in ALaX422 alloy, while both cross-slip of dislocations and climb of
Jian Meng has completed his PhD from Toyohashi University of Technology. He is the Professor and Director of Light Alloy Research Group, State Key Laboratory of Rare Earth Resource Utilization, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences. He has published more than 115 papers in reputed journals, has 36 authorized patents and has been serving as an Editorial Board Member of Journal of Rare Earths.