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一种化策略,以抑制基于的单晶超级合金中的再结晶

Xing Hu¹, Fuze Xu^2,3, Menglin Gao¹

¹Institute of Materials Research, Shenzhen International Graduate School, Tsinghua University, Shenzhen 518055, China.

Materials (Basel, Switzerland)

|July 30, 2025

概括

抑制单晶超合金中的再结晶是轮机叶片的关键. 一个1000°C的回收炼有效地通过最小化几何上必要的位移 (GNDs) 来防止再结晶.

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:

在先进的轮叶片应用中,对高应变基单晶超合金的再结晶抑制至关重要.
了解初级玛素 (γ') 阶段的演变和化过程中的位移对于控制材料特性至关重要.

研究的目的:

在压力变形后,研究初级 γ' 阶段的化行为和第三代 Re-containing 单晶超合金 (WZ30) 中的位移.
确定最佳的回火条件,以抑制这些先进超级合金中的再结晶.

主要方法:

将WZ30超合金进行5%的压力变形.
在1分钟内从700°C到1200°C进行同时火.
使用扫描电子显微镜 (SEM) 和电子反射散射衍射 (EBSD) 进行微观结构分析.
在1000°C进行长时间的回收化,持续10小时.

主要成果:

观察到几何必要脱位 (GND) 密度与回火温度的非线性变化.
确定了1000°C的最小GND密度,保留了62.7%的初级γ'阶段.
证明在1000°C的长时间回收化有效地抑制了随后溶液热处理期间的再结晶.

结论:

一种特殊的化策略,涉及1000°C的长时间回收,可以有效地抑制单晶超级合金中的再结晶.
这种方法提供了一种实际的方法来提高轮机叶片的高温性能和耐用性.

关键词:

烧焦的烧焦方式微观结构的微观结构再结晶化,重新结晶化单晶超合金是一种单晶超合金.

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