李洋,蔡军,李清阳,李冲冲,鱼祎雯,强凤鸣

• 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)：

采用Gleeble-3800热模拟试验机在变形温度为550～700℃,应变速率为0.001～10 s~(-1),真应变为0.9的条件下对Cu-Sn合金进行了高温压缩实验，研究其热变形行为。基于Cu-Sn合金的热模拟压缩结果，建立了其在热加工过程中在动态回复-加工硬化阶段的流变应力本构方程。由能量耗散图和失稳图两部分叠加建立了基于动态材料模型(DMM)的Cu-Sn合金的热加工图。结果表明：Cu-Sn合金流变应力对应变速率和温度敏感；在高温或低应变速率下，应力-应变曲线表现为动态回复型；在低温或高应变速率下，应力-应变曲线表现为动态再结晶型；建立的Cu-Sn合金的物理本构方程较为精确；根据热加工图可以看出Cu-Sn合金理想的的热加工区域为：变形温度为550～700℃和应变速率为0.001～0.01 s~(-1)。

关键词(KeyWords)： Cu-Sn合金;热压缩实验;本构方程;热加工图

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): 李洋,蔡军,李清阳,李冲冲,鱼祎雯,强凤鸣

DOI: 10.13289/j.issn.1009-6264.2025-0102

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