界面在多相金属间化合物合金形变过程中的作用

THE ROLE OF INTERFACE IN THE DEFORMATION PROCESS OF MULTIPHASE INTERMETALLICS

综述了近年来多相金属间化合物研究进展，强调界面对多相合金的形变过程及力学行为的影响，讨论范围限于TiAl基利（Ni、Fe，Co）Al基多相合金,界面位错源的启动可以提高脆性相的形变能力.采用适当的制备和加工工艺可以突出多相合金中界面的有益作用。

Recent developments in multiphase intermetallics are reviewed in this paper.The emphasis is placed upon the role various interfaces play in influencing the deformationprocess and mechanical behaviour of the multiphase alloys. The examples are taken fromTiAl based and (Ni,Fe,Co)Al based materials. It is shown that the operation of interface-related dislocation sources can improve the deformability of the brittle phases. A better balanceof mechanical properties can be obtained when the beneficial effects of the interfaces are manifested by a proper choice of constituent phases and conditions of material preparation andprocessing.