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使用透射电镜观察了GH36合金中M_(23)C_6、VC碳化物和基体之间的界面结构,在M_(23)C_6/γ的半共格界面上分布有错配位错列,间距约10nm。根据(?)=0判据,可以确定该位错的Burgers vector (?)=a/2(110)γ,VC/γ的相界面是具有很大点陈错配度(δ=+0.155)的共格界面。最后,从M_(23)C_6、VC和基体之间的不同界面结构与性质讨论了以碳化物沉淀为主要强化手段的Fe基GH36合金的强韧化本质以及如何识别波纹图(Moire pattern)和界面位错的问题。
The interfacial structure of M_ (23) C_6, VC carbide and matrix in GH36 alloy was observed by transmission electron microscopy. Mismatched dislocations were distributed on the half-lattice interface of M_ (23) C_6 / γ with a pitch of about 10 nm . According to the criterion of (?) = 0, the Burgers vector (?) = A / 2 (110) γ of this dislocation can be determined and the phase interface of VC / The coherent interface. Finally, we discuss the toughening nature of the Fe-based GH36 alloy with carbide precipitation as the main strengthening mechanism and how to identify Moire pattern from the different interface structures and properties between M_ (23) C_6, VC and matrix. Interface dislocation problem.