粉末冶金技术2013，Vol.31Issue(3)：174-179,6.
氧化铝粉末热等静压致密化过程模拟与验证
Simulation and experimental verification of the alumina powder HIP densification process
摘要
Abstract
Based on the plastic mechanics,the Shima yield criterion and a modified Maxwell viscoplastic model were used to describe the deformation of alumina powder under hot isostatic pressing(HIP).After the HIP process,the shrink rate at the corner of the cylinder is smaller than that at the middle of cylinder,i.e.13.67％ and 19.04％ respectively.The external pressure is uniform at beginning.The deformation resistance in corner area is larger than the resistance in middle area,which causes the shape distortion.Compared with the experiment result,the calculation result is 1.5％ larger than the experimental result in relative density.The calculation result agrees with experiment well in the simple shape area such as the middle area of the cylinder.In terms of the extent of shape distortion,the calculation result is less than the experiment result in complicated shape area such as the corner with the deviation of less than 4％.In conclusion,the simulation can forecast the alumina powder forming process under hot isostatic press,which provides the reference for the near-net-shape forming of the complex components.关键词
氧化铝粉末/热等静压/近净成形/数值模拟/粉末致密化/包套变形Key words
alumina powder/HIP/near-net-shape forming/simulation/powder densification/canning deformation引用本文复制引用
陈烨欣,刘凯,魏青松,贺文婷,史玉升..氧化铝粉末热等静压致密化过程模拟与验证[J].粉末冶金技术,2013,31(3):174-179,6.基金项目
国家科技重大专项子课题(2009XZ04005-041-03) （2009XZ04005-041-03）
中欧国际科技合作项目(2010DFB53110) （2010DFB53110）
