图书来源:二元合金相图及中间相晶体结构 二元合金相图及中间相晶体结构
作 者:唐仁政 田荣璋
出版时间:2009-05
定 价:320元
图书ISBN:978-7-81105-831-4
出版单位:中南大学出版社
X. Ren1), G.Q. Chen1), W.L. Zhou1), C.W. Wu2), C. Yuan3) and J.S. Zhang1) 1) State Key Laboratory of Materials Modification by Laser, Ion and Electron Beams, Dalian University of Technology, Dalian 116085, China 2) State Key Laboratory of Structural Analysis for Industrial Equipment, Dalian University of Technology, Dalian 116085, China 3) Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, China
摘 要:The shape change of the γ’ precipitates of cast Ni-based superalloy K52 after aging treatment under a high magnetic field was investigated. The results show that duplex γ’ precipitates are present in the γ’ matrix after aging treatment with or without the magnetic field. One is the coarse particles with average size of 500 nm; the other is fine spherical γ’ precipitates with average of 100 nm in diameter. The application of a 10T magnetic field only results in the shape of the coarse γ’ particles changing from spherical to cuboidal when the alloys subjected to the same heat treatments. This shape change was mainly discussed based on the strain energy increase caused by the difference in magnetostriction between the γ’ matrix and γ’ precipitates. The fine γ’ particles still keep spherical. Further TEM observations shows that a number of γ’ particles in nano-scale precipitate in the coarse γ’ particles in the specimens treated without the magnetic field. In addition, it was found that the magnetic field caused the decrease of the hardness in the alloy, and the hardness was associated with the field direction.
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