李清阳,蔡军,李冲冲,鱼祎雯

• 1:西安建筑科技大学冶金工程学院功能材料加工国家地方联合工程研究中心

摘要(Abstract)：

在变形温度为823～973 K,应变速率为0.001～1 s~(-1)及真应变为0.9的条件下，采用Gleeble-3500热模拟实验机对Cu-Sn合金进行了热压缩实验，分析了其热变形行为。基于Cu-Sn合金的热压缩实验结果，利用多元线性回归建立了描述合金热变形特征的修正Zerilli-Armstrong模型。引入了相关系数(R)和平均相对误差(AARE)对模型的精度进行评估。结果表明：Cu-Sn合金的流动应力受变形温度和应变速率的影响显著，流动应力随应变速率的增大和变形温度的降低而增大，流动应力呈现锯齿状抖动是加工硬化与流动软化之间竞争的结果；修正Zerilli-Armstrong模型的预测应力值与实验应力值的R和AARE值分别为0.986和7.12%,表明该模型的精度较高，能够准确地描述Cu-Sn合金的高温流动行为。

关键词(KeyWords)： Cu-Sn合金;热压缩实验;本构方程;热变形行为

Abstract:

Keywords:

基金项目(Foundation): 国家重点研发计划(2022YFB3804001);; 国家自然科学基金(52374400);; 陕西省教育厅产业化项目(21JC020)

作者(Author): 李清阳,蔡军,李冲冲,鱼祎雯

DOI: 10.13289/j.issn.1009-6264.2023-0388

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