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Experimental Procedure for Warm Spinning of Cast Aluminum Components
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先进合金VT8M-1的微结构经过旋转摇摆
Grigory S Dyakonov1, Tatyana V Yakovleva1, Sergei Y Mironov2
1Laboratory of Multifunctional Materials, Ufa University of Science and Technology, 32 Zaki Validi st., 450076 Ufa, Russia.
Materials (Basel, Switzerland)
|November 14, 2023
概括
先进的VT8M-1合金的旋转交换 (RS) 通过增加低角度边界来改进其微观结构. 这个工艺不同于等通道角压力 (ECAP),影响造应用的合金特性.
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.
- 物理金学 物理金学
背景情况:
- 像VT8M-1这样的先进合金提供了增强的耐热性,将它们定位为Ti-6Al-4V的潜在替代品.
- 了解加工过程中的微结构演变对于优化合金性能至关重要.
研究的目的:
- 在旋转交换 (RS) 过程中调查Ti-5.7Al-3.8Mo-1.2Zr-1.3Sn-0.15Si (VT8M-1) 合金的微结构行为.
- 为了将RS的微结构结果与等通道角压力 (ECAP) 的结果进行比较.
主要方法:
- 在VT8M-1合金上应用了旋转交换 (RS).
- 电子反射衍射 (EBSD) 用于分析微观结构变化.
- 使用传输电子显微镜 (TEM) 检查粒子特性.
主要成果:
- RS导致了持续的动态再结晶,显著增加了低角度边界密度 (从0.38到1.21μm-1).
- 状 (α + β) 阶段的球状化不完整,平均球状颗粒大小为0.3μm (TEM).
- 与类似应变水平的ECAP相比,RS导致低和高角度边界的密度更高.
结论:
- RS促进了独特的微观结构,其特点是高密度的低角度边界.
- 在RS下微观结构的演变与ECAP有很大的不同,特别是在全球化阶段.
- 这些发现有助于预测用于生产造长杆的合金微结构.
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