在电脉冲处理下,基超级合金的谷物生长动力学
Zhiyu Xiang1,2, Hongwei Li1,2, Xin Zhang1,3,4
1Shaanxi Key Laboratory of High-Performance Precision Forming Technology and Equipment, Northwestern Polytechnical University, Xi'an 710072, China.
Materials (Basel, Switzerland)
|May 14, 2025
概括
与热处理 (HT) 相比,电脉冲处理 (EPT) 在金属材料中提供了优越的颗粒边界控制. EPT加速了谷物边界迁移,特别是在谷物边界密度较高的地区.
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.
- 物理金学 物理金学
背景情况:
- 颗粒边界极大地影响金属材料的性能.
- 热处理 (HT) 是修改谷物边界的标准,但面临规模不匹配的挑战.
- 电脉冲治疗 (EPT) 通过局部的朱尔加热和无热效应为微结构控制提供了一种新的方法.
研究的目的:
- 调查EPT中用于谷物边界调节的热和热后效应的机制.
- 在EPT下分析以为基础的超级合金中的谷物生长动力学,该超级合金具有不均的微结构.
- 在谷物边界修改方面,将EPT与传统HT进行比较.
主要方法:
- 采用了实验和理论方法.
- 研究了粗粒和细粒地区的谷物边界迁移行为.
- 通过化双胞胎进化,建立和验证了谷物生长动力学.
主要成果:
- 与HT相比,EPT显著加速了谷物边界迁移.
- 观察到一个"目标效应",其中EPT的增长率与谷物边界密度相关.
- EPT 的有效性与增强的迁移和减少治疗时间之间的平衡有关.
结论:
- EPT提供了一种比HT更有效的谷物边界调节方法.
- 了解热和热后效应的相互作用是优化EPT的关键.
- EPT的疗效是由微观结构特征和治疗参数调节的.
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