梁强,张贤明,李平,刘新

• 1:重庆工商大学废油资源化技术与装备教育部工程中心
• 2:重庆工商大学机械工程学院
• 3:重庆大学材料科学与工程学院

摘要(Abstract)：

采用Gleeble-3500热模拟试验机对HNi55-7-4-2合金进行热压缩实验,研究其高温流变应力行为。通过等温热压缩实验和摩擦修正获得了HNi55-7-4-2合金在温度为600～800℃、应变速率为0.01～10 s~(-1)时的应力-应变曲线。结果表明:HNi55-7-4-2合金的流变应力值与温度、应变速率和变形量之间成非线性关系,流变应力值随着应变率增大而升高,随着变形温度的升高而降低。基于实验数据,分别建立修正Arrhenius本构模型和粒子群算法优化的支持向量机回归模型(SVR-PSO),引入统计学方法对模型的精度进行量化评估:修正Arrhenius模型的平均相对误差和均方根误差分别为6.30%和2.43 MPa,SVR-PSO模型的平均相对误差和均方根误差分别为0.61%和0.28 MPa,SVR-PSO模型预测精度和泛化能力均优于Arrhenius模型。

关键词(KeyWords)： HNi55-7-4-2合金;流变行为;Arrhenius模型;SVR-PSO模型

Abstract:

Keywords:

基金项目(Foundation): 重庆市基础科学与前沿技术研究基金(cstc2017jcyjAX0175);; 重庆市教育委员会科学技术研究项目(KJQN201900836)

作者(Author): 梁强,张贤明,李平,刘新

DOI: 10.13289/j.issn.1009-6264.2020-0093

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