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基于Fe-Ni-Cr的超级合金的热变形行为和微观结构演变

Yan Wang^1,2,3, Tianyi Wang⁴, Guohua Xu⁴

¹Research Institute of Aero-Engine, Beihang University, Beijing 100191, China.

Materials (Basel, Switzerland)

|January 10, 2026

概括

这项研究详细介绍了GH2787超合金的热变形,建立了一个准确的构成方程,并确定了最佳的加工窗口. 阐明了动态再结晶机制,有助于优化热加工过程.

科学领域:

材料科学材料科学材料科学
金工业是金工业的一个方面.
机械工程机械工程

背景情况:

在高温应用中,GH2787超级合金至关重要.
了解其热变形行为对于制造至关重要.
关于其热工作参数的现有数据需要进行系统的调查.

研究的目的:

系统地研究GH2787超级合金的热变形机制.
为其在热工作条件下的流动行为开发预测模型.
构建热工作地图并确定最佳处理参数.

主要方法:

热压缩测试在1060-1120°C的温度范围内进行,应变速率为0.1-10s-1.1.
一个Arrhenius类型的构成方程被用来建模流动行为.
一个动态材料模型被用来构建热工作地图.
进行了微结构分析,以检查再结晶现象.

主要成果:

开发出了一个精确的阿雷尼乌斯型构成方程,计算的激活能量 (Q) 为364,401.19 J/mol.
在热工作图上确定了两个优选的处理区域,功耗效率>0.3,没有观察到流动不稳定性.
动态再结晶 (DRX) 的程度随着温度和应变速率的增加而增加,以不连续的DRX (谷物边界膨胀核) 为主,并以连续的DRX (子谷物旋转和凝聚) 为辅.

结论:

这项研究为GH2787超级合金的热变形行为提供了全面的了解.
确定了热加工的最佳加工参数和区域.
这些发现为提高GH2787超级合金的制造工艺提供了关键的理论指导.

关键词:

在 DRX 机制上,DRX 机制 GH2787超级合金是一种超级合金.热变形热变形热变形微观结构的演变.处理地图的处理地图

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