连续胞状结构强化Ta-W-Hf合金的压缩变形

Compress Deformation of Ta-W-Hf Alloy Strengthened by Continuous Cellular Structure

摘要:

采用粉末冶金法制备了具有连续胞状强化结构的致密Ta-W-Hf合金材料，通过压缩试验研究了这种高强度材料的塑性变形特征，以了解其进一步变形加工的可能性。结果表明，连续胞状结构强化Ta-W-Hf材料与传统熔炼加工材的压缩变形特征没有大的区别，各试样均可承受50%以上的冷压缩变形，而无宏观裂纹产生。试样的硬度随着压缩变形量的增加而增大，但高温退火试样的硬度增量远大于热等静压试样，故其具有更大的形变强化容量。

Abstract:

Ta-W-Hf dense alloy material with continuous cellular strengthening structure was produced by powder metallurgy (PM) method. The plastic deformation characteristic of the high-strength material was researched by compression test to find out the possibility of further deformation process. The results indicate that the compression deformation characteristics of Ta-W-Hf alloy with continuous cellular strengthening structure were similar to that of the traditional material. Both of them can be subjected to cold compressed deformation with larger than 50% deformation amount but without macroscopical crack. The hardness of the sample was increased with deformation amount increasing. But the hardness increment of the sample annealed at high temperature was much larger than that of the HIPed sample. So the sample annealed at high temperature has much larger capacity of deformation strengthening.