热机械处理对Ag-15Cu原位纤维复合材料结构及性能的影响

Effect of Thermomechanical Treatment on Microstructure and Properties of Ag-15Cu in situ Filamentary Composites

摘要:

采用包括热挤压、热处理及冷拉拔在内的热机械处理制备了Ag-15Cu原位纤维复合材料，其强度达到996 MPa并具有62%IACS的电导率。均匀化热处理及低温时效处理能有效提高材料的强化潜力，而在形变过程中的多次低温热处理即使在较大的应变条件下也能大大提高材料的电导率而强度没有降低。讨论了热处理对材料结构和性能的影响机理。

Abstract:

Thermomechanical treatments including hot extrusion, heat treatment and cold drawing were used to prepare Ag-15Cu in situ filamentary composites. The obtained composites can achieve a strength of 996 MPa and keep a conductivity of 62%IACS. Homogenization treatment and low temperature aging can effectively improve the strengthening potential of the material, while low temperature heat treatment of several times during drawing can greatly improve the conductivity and there is no loss of strength even at high strain. The influencing mechanism of heat treatments on the microstructure and properties were discussed