通过实验证据和建模方法对1050Al合金中的再结晶动力学的研究
Purnima Chakravarty1,2, János György Bátorfi1,2, Jurij J Sidor1
1Savaria Institute of Technology, Faculty of Informatics, Eötvös Loránd University (ELTE), Károlyi Gáspár tér 4, 9700 Szombathely, Hungary.
Materials (Basel, Switzerland)
|September 9, 2023
概括
该研究调查了合金中的再结晶动力学,发现储存的能量显著影响了转化过程. 分析了硬度和微观结构的变化,以了解谷物边界运动和转变速率.
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.
- 物理化学 物理化学
背景情况:
- 重结晶 (RX) 是金属成型和热处理中的一个关键过程.
- 了解RX动力学对于优化材料性能至关重要.
- 变形,温度和时间对RX的影响是复杂的,需要详细研究.
研究的目的:
- 研究商业纯合金的再结晶动力学.
- 分析储存能量,回火参数和微观结构演变之间的关系.
- 应用约翰逊-梅尔-阿弗拉米-科尔莫戈罗夫 (JMAK) 理论来建模再结晶过程.
主要方法:
- 对回火温度,时间和变形度的实验分析.
- 维克尔斯硬度测量以确定储存的能量和再结晶的体积分数.
- 导向成像显微镜 (OIM) 用于微观结构分析.
- 约翰逊-梅尔-阿弗拉米-科尔摩戈罗夫 (JMAK) 理论的应用和分析模型的开发.
主要成果:
- 观察到重结晶行为的强烈依赖于储存的能量.
- 硬度和储存的能量随着回火时间的增加而减少.
- 确定了一个"软化窗口" (42-55秒),硬度急剧下降,储存能量和高角度谷物边界 (HAGB) 速度急剧下降.
- 确定了Avrami指数 (n),描述了RX动力学.
结论:
- 储存的能量是Al合金中再结晶运动的主要驱动因素.
- JMAK模型和实验数据提供了对RX转换的全面了解.
- 识别的软化窗口为流程优化提供了洞察力.
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