要促进Laves相NbCr2/Nb两相合金在航空发动机热端部件上的应用，解决其热态大塑性锻造成型是关键。项目拟对前期研究出的具有优异室、高温强度和良好室温塑韧性的Laves相NbCr2/Nb两相合金热态塑性变形机制及内禀可加工性开展系统研究，探究其热态大塑性变形下的塑性流动力学行为和微观组织演变规律，构建塑性流动力学模型和微观组织演变物理模型，揭示硬脆Laves相NbCr2与软第二相Nb固溶体间的变形协调机制及热态塑性变形机制；研究各种有益塑性变形机制和有害塑性变形机制对热力参数的动态响应，确定各种塑性变形机制的影响因素及作用机理；建立合金热力参数-流动应力-塑性变形机制-微观组织/缺陷之间的内在关系及其关联机制，揭示合金内禀可加工性的影响因素及作用机理；优化合金的内禀可加工性，挖掘这种新型高强度难变形材料的最大塑性变形能力。研究结果可为实现该新型高温结构材料的锻造成型提供理论和技术支撑。

To promote the application of Laves phase NbCr2/Nb two-phase alloy in aeroengine hot-end parts, it is the key to solve the hot-state large plastic forging problem of the alloy. This research will intend to systematically study the thermoplastic deformation mechanisms and intrinsic workability of Laves phase NbCr2/Nb two-phase alloy with excellent room and high -temperature strength, good room-temperature plasticity and toughness which was shown in the preliminary study. The plastic flow mechanics behavior and microstructure evolution mechanism under large thermal plastic deformation process will be explored. Both a plastic flow mechanics model and a physical model of microstructure evolution will be constructed. The deformation coordination mechanism between Laves phase NbCr2 (hard and brittle) and soft second phase Nb solid solution and hot plastic deformation mechanism will be revealed. The dynamic response of various beneficial plastic deformation mechanisms and harmful plastic deformation mechanisms to thermodynamic parameters will be researched. The influencing factors and acting mechanism on the various plastic deformation mechanisms will be determined. The intrinsic relationship and correlation mechanisms among thermodynamic parameters, flow stress, plastic deformation mechanisms and microstructure/defect will be established, and the influencing factors and acting mechanism on the intrinsic workability will be revealed. In order to excavate the maximum plastic deformation capacity of this new high strength refractory material, the intrinsic workability will be optimized. The research results can provide theoretical and technical support for the forging of this new high temperature structural material.