首页|预测典型变形高温合金均匀化动力学的新模型

预测典型变形高温合金均匀化动力学的新模型

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提出一种基于扩散距离概念的变形高温合金均匀化动力学新预测模型.通过定量电子探针(EPMA)分析,系统研究典型镍基变形高温合金(GH4141)的微观偏析和均匀化动力学.研究发现,基于残余偏析指数模型预测的均匀化动力学与实际测量结果之间存在一定差异.实验和理论分析均表明,考虑了过去通常被忽略的扩散方向因子的一维扩散距离模型可以合理地预测均化动力学.新模型在只需知道原始枝晶臂间距和扩散系数前提下即可完成预测计算,这为变形高温合金均匀化动力学预测提供了一种新的选择.
New model for predicting homogenization kinetics of typical wrought superalloy
A new homogenization kinetics prediction model for wrought superalloys based on the concept of diffusion distance was proposed.The micro-segregation and homogenization kinetics of Ni-based wrought superalloy,GH4141,were systematically studied by using the quantitative electron prob X-ray micro-analyzer(EPMA)analyses.There is a discrepancy between the predicted homogenization kinetics by the residual segregation index model and the experimental measurement.Both the experiments and theoretical analyses reveal that the homogenization kinetics can be reasonably predicted by the diffusion distance model under 1D-diffusion condition,with considering the diffusion-direction factor that is usually ignored.The new model provides a new option for predicting the homogenization kinetics with only necessarily knowing the original dendrite arm spacing and diffusion coefficient.

wrought superalloymicro-segregationhomogenization kineticsprediction modeldiffusion distance

张献光、杨文超、周扬、闫建昊、肖东平、税烺、付建辉、孙飞、石鹏、陈佳俊、裴逸武、张健

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北京科技大学绿色低碳钢铁冶金全国重点实验室,北京 100083

北京科技大学冶金与生态工程学院,北京 100083

成都先进金属材料产业技术研究院股份有限公司,成都 610300

攀钢集团研究院有限公司,攀枝花 617000

Department of Material Design Innovation Engineering,Nagoya University,Furo-cho,Chikusa-ku,Nagoya 464-8603,Japan

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变形高温合金 微观偏析 均匀化动力学 预测模型 扩散距离

国家自然科学基金Beijing Municipal Natural Science Foundation,ChinaInterdisciplinary Research Project for Young Teachers of USTB,China(Fundamental Research Funds for the Central Universities,

518042322212041FRF-IDRY-20-020

2024

10.1016/S1003-6326(24)66462-9

中国有色金属学报(英文版)
中国有色金属学会

中国有色金属学报(英文版)

CSTPCD
影响因子：1.183
ISSN：1003-6326
年,卷(期)：2024.34(4)
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