热变形行为通过同热压缩和GH2132超级合金的构成模型
Yue Sun1,2, Peng Cheng1, Decheng Wang1,2
1China Productivity Center for Machinery, China Academy of Machinery Science and Technology, Beijing 100044, China.
Materials (Basel, Switzerland)
|December 31, 2025
概括
这项研究详细介绍了GH2132超级合金的热变形行为,这对航空发动机至关重要. 使用先进的建模确定了最佳加工参数,提高了材料性能.
科学领域:
- 材料科学 材料科学 材料科学
- 金工程 金工程 金工程
- 机械工程 机械工程
背景情况:
- GH2132是一种Ni-Cr-Fe超合金,对于航空发动机组件至关重要.
- 它的热加工性对加工参数非常敏感,需要进行详细的研究.
研究的目的:
- 为了研究GH2132合金的热变形行为.
- 建立其流应力和微观结构演变的预测模型.
- 使用动态材料模型划定安全处理窗口.
主要方法:
- 使用Gleeble-3500-GTC进行异热压缩测试,温度为850-1100°C,应变速率为0.001-10s-1.
- 通过光学显微镜和电子反射衍射 (EBSD) 进行微结构性表征.
- 开发一个应变补偿的阿雷尼乌斯类型的高波形 sinus 模型和3D处理图.
主要成果:
- 开发了一个具有高精度 (R2 = 0.9916,AARE = 3.86%) 的预测模型,平均激活能量为446.2 kJ·mol-1 .
- 流量应力与温度相反,与延展率直接相关.
- 微结构性软化从动态回收到动态再结晶的过渡在更高的温度和较低的拉伸率下.
- 确定最佳处理窗口为 1000-1100 °C 在 0.001-0.01 s-1 处,并指出不稳定区域.
结论:
- 已建立的模型准确地预测了GH2132.3的热变形行为.
- 了解温度,延展率和微观结构之间的相互作用是优化热力学处理的关键.
- 这些发现为制造航空发动机GH2132组件提供了必要的指导.
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