包套对热等静压过程中镍基高温合金形变和致密化的影响

杨乐彪; 任晓娜; 蔡超; 薛鹏举; 伊凡; 史玉升; 葛昌纯

doi:10.1007/s12613-021-2349-4

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Jan. 2023

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文章导航 > 矿物冶金与材料学报（英文） > 2023 > 30(1): 122-130

Lebiao Yang, Xiaona Ren, Chao Cai, Pengju Xue, M. Irfan Hussain, Yusheng Shi, and Changchun Ge, Effect of the capsule on deformation and densification behavior of nickel-based superalloy compact during hot isostatic pressing, Int. J. Miner. Metall. Mater., 30(2023), No. 1, pp. 122-130. https://doi.org/10.1007/s12613-021-2349-4

Cite this article as:

Lebiao Yang, Xiaona Ren, Chao Cai, Pengju Xue, M. Irfan Hussain, Yusheng Shi, and Changchun Ge, Effect of the capsule on deformation and densification behavior of nickel-based superalloy compact during hot isostatic pressing, Int. J. Miner. Metall. Mater., 30(2023), No. 1, pp. 122-130. https://doi.org/10.1007/s12613-021-2349-4

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研究论文

包套对热等静压过程中镍基高温合金形变和致密化的影响

1)
北京科技大学材料科学与工程学院粉末冶金与先进陶瓷研究所，北京 100086，中国
2)
华中科技大学材料科学与工程学院材料加工与模具技术国家重点实验室，武汉 430074，中国

通讯作者:
任晓娜 E-mail: renxn@ustb.edu.cn

蔡超 E-mail: chaocai@hust.edu.cn

文章亮点

(1) 通过单轴压缩试验修正了用于镍基高温合金热等静压成型分析的有限元Shima屈服准则。

(2) 确定了FGH4096M粉末压块屈服准则系数。

(3) 利用修正后的Shima模型对试样致密化进行模拟，试样收缩的实验与模拟结果吻合较好，最大误差1.5%。

中文摘要

热等静压近净成形工艺对于制备复杂部件具有极大优势，准确预测热等静压成形中部件形变收缩是实现该技术制备复杂部件的关键。而包套对压力的传递具有延迟或屏蔽效应，对内部粉末形变收缩和致密化过程具有重要影响。因此，本文结合热等静压中断实验，对传统的有限元Shima屈服准则进行了修正，确定了用于模拟FGH4096M高温合金热等静压过程的Shima模型屈服准则的关键参数，将热等静压粉末致密化的过程可视化。结果表明，模拟收缩与实验收缩结果吻合较好，最大误差为1.5%；对于ϕ50 mm × 100 mm的圆柱形包套，在轴向与径向的力臂差作用下，其轴向收缩比径向高1.7%；由于尺寸和力臂差的影响，当包套厚度从2 mm提升到4 mm时，试样的径向与轴向最大位移比从0.47提升到0.75。经综合分析，包套对内部粉体的压力屏蔽值可以表达为 $P = \dfrac{{\sqrt 3 \left( {{b^2} - {a^2}} \right)}}{{3{a^2}{b^2}}}{r^2}{\sigma _{\rm{s}}}$。

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Research Article

Effect of the capsule on deformation and densification behavior of nickel-based superalloy compact during hot isostatic pressing

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Abstract

Abstract

The Shima yield criterion used in finite element analysis for nickel-based superalloy powder compact during hot isostatic pressing (HIP) was modified through uniaxial compression experiments. The influence of cylindrical capsule characteristics on FGH4096M superalloy powder compact deformation and densification behavior during HIP was investigated through simulations and experiments. Results revealed the simulation shrinkage prediction fitted well with the experimental shrinkage including a maximum shrinkage error of 1.5%. It was shown that the axial shrinkage was 1.7% higher than radial shrinkage for a cylindrical capsule with the size of ϕ50 mm × 100 mm due to the force arm difference along the axial and radial direction of the capsule. The stress deviated from the isostatic state in the capsule led to the uneven shrinkage and non-uniform densification of the powder compact. The ratio of the maximum radial displacement to axial displacement increased from 0.47 to 0.75 with the capsule thickness increasing from 2 to 4 mm. The pressure transmission is related to the capsule thickness, the capsule material performance, and physical parameters in the HIP process.
- hot isostatic pressing;
- nickel-based superalloy compact;
- capsule;
- densification;
- deformation

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