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喷雾成型7055造合金的微观结构演变和构成模型

Yu Deng¹, Huyou Zhao¹, Xiaolong Wang¹

¹College of Materials Science and Engineering, Chongqing University, Chongqing 400044, China.

Materials (Basel, Switzerland)

|September 13, 2025

概括

本研究详细介绍了喷雾成型的7055合金的热变形,开发了构成模型和处理图. 它揭示了在不同条件下影响微观结构的动态恢复和再结晶机制.

科学领域:

材料科学材料科学材料科学
金工业是一种金工业.
机械工程机械工程

背景情况:

喷雾成型的7055合金对于航空航天应用至关重要.
了解其热变形行为对于优化制造工艺至关重要.
现有的研究可能无法完全捕捉微观结构上的拉伸率和温度的相互作用.

研究的目的:

为了研究喷雾成型的7055造合金的热变形行为.
开发一个准确的构成模型来预测流应力.
使用处理图建立最佳处理参数,并分析微结构演变.

主要方法:

同热热压试验在一系列应变速率 (0.0110s−1) 和温度 (340460°C) 中进行.
通过使用摩擦和温度校正的流应力数据,开发了一个Arrhenius构成模型.
通过整合不稳定性标准和耗电效率,构建了处理图.

主要成果:

一个Arrhenius模型实现了高精度 (R=0.9877,AARE=4.491%) 的变形激活能量 (Q) 为117.853 kJ/mol.
在400460°C的温度范围内确定了最佳的处理参数,延展率为0.080.37s−1.1.
微结构分析显示了同时的动态恢复 (DRV) 和动态再结晶 (DRX),如连续动态再结晶 (CDRX) 和不连续动态再结晶 (DDRX) 的主导机制在不同的应变速率和温度.

结论:

开发的构成模型准确地预测了合金在热变形下的行为.
处理地图为7055合金的工业应用提供了宝贵的指导.
应变速率和温度显著影响动态软化机制和微观结构的演变,CDRX在较高的应变速率处受青,而DDRX在较低的应变速率处受青.

关键词:

构成模型的构成模型热变形行为热变形行为微观结构的微观结构喷雾成型的7055合金是一种7055合金.

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