(中南大学 材料科学与工程学院，长沙 410083)
摘 要:
关键字: ZK60合金；钇；退火；晶粒长大
（School of Materials Science and Engineering, Central South University, Changsha 410083, China）
Abstract:ZK60 and ZK60(0.9Y)alloys were hot rolled and then annealed for various times. The evolution of microstructure and properties of the alloy were investigated. The results show that all alloys after annealing for 30 min have recrystallized structure. But the grain of ZK60(0.9Y)alloy is more fine and the growth amplitude of annealed grain is less than that of ZK60 alloys after annealing at 300−400 ℃. The grain size is 20 μm and σb is 226.9 MPa when ZK60(0.9Y) alloy after annealing for 120 min at 400 ℃. The calculation result shows that the activation energy of grain boundary migration of ZK60 alloy recrystallization is increased from 42.66 kJ/mol to 56.34 kJ/mol because of the addition of yttrium element. In addition, the growth model of recrystallized grain was established.
Key words: ZK60 alloy; yttrium; annealing; grain grow
