航空材料学报2025，Vol.45Issue(4)：85-96,12.DOI:10.11868/j.issn.1005-5053.2024.000188
基于响应面法的GH738高温合金热变形工艺参数优化
Optimization of hot deformation processing parameters of GH738 superalloy based on response surface methodology
摘要
Abstract
Based on hot compression tests of GH738 superalloy,encompassing deformation temperatures ranging from 980℃to 1100℃and strain rates of 0.001-0.1 s-1,deformation activation energy(Q),temperature-compensated strain factor(lnZ),power dissipation efficiency(η)and instability factor(ξ((ε)))are calculated.Subsequently,a response surface model is established,utilizing hot deformation processing parameters as input variables and targeting Q,lnZ,η andξ((ε))as output metrics.This model facilitates the optimization of the superalloy's heat deformation processing parameters.The results show that the superalloy's flow stress exhibits considerable sensitivity to variations in these parameters,which significantly impact Q,lnZ,η andξ((ε)).Notably,the established response surface model demonstrates exceptional prediction accuracy,with average absolute relative errors of 0.494%,0.564%,0.919%and 13.484%for Q,lnZ,η andξ((ε)),respectively.Employing multi-objective optimization—aiming for low Q and lnZ coupled with high η andξ((ε))—the optimal deformation processing parameters are determined to within the range of 1092-1100℃deformation temperatures and 0.001-0.0056 s-1 strain rates.Microstructural analysis conducted under these optimized parameters further validates the accuracy of the multi-objective optimized results.关键词
GH738高温合金/热变形行为/响应面法/工艺参数优化Key words
GH738 superalloy/hot deformation behavior/response surface methodology/processing parameters optimization分类
航空航天引用本文复制引用
王攀智,卢熠,龚忠兴,吴永安,张华,王涛..基于响应面法的GH738高温合金热变形工艺参数优化[J].航空材料学报,2025,45(4):85-96,12.基金项目
国家重点研发计划(2021YFB3700405) （2021YFB3700405）
