热压缩的低稀土含量Mg-Nd-Zr-Ca合金的微结构分析
Yiquan Li1,2, Bingchun Jiang1, Rui Yang2
1School of Mechanical and Electrical Engineering, Guangdong University of Science and Technology, Dongguan 523083, China.
Materials (Basel, Switzerland)
|October 16, 2025
概括
这项研究揭示了热压缩如何影响合金微观结构,详细介绍了动态再结晶机制和沉物形成. 了解这些过程对于改善热力学加工中的塑料可塑性至关重要.
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:
- 热压缩对于合金的热机械加工至关重要.
- 了解塑料可塑性需要详细的微观结构分析.
研究的目的:
- 在热压缩下研究低稀土Mg-Nd-Zr-Ca合金的微结构演变.
- 分析塑性变形,动态再结晶和沉物形成的机制.
主要方法:
- 进行了热压缩试验和有限元模拟.
- 微结构性特征技术分析了滑动系统,生,动态再结晶 (DRX) 和沉物.
- 分析的重点是菌株分布,结构变化和阶段演变.
主要成果:
- 观察到异质的同等菌株分布,集中在核心.
- 一个类似项链的微观结构形成后压缩.
- 连续动态再结晶 (CDRX),双胞胎诱导动态再结晶 (TDRX) 和粒子刺激核化 (PSN) 被确定为主要的DRX机制.
- Mg41Nd5和α-Zr阶段增加了脱位密度.
- 热压缩条件触发了Mg41Nd5相的动态沉.
结论:
- 热压缩显著改变合金的微观结构,影响塑料的可塑性.
- 已识别的DRX机制和沉行为对于优化热力学处理至关重要.
- 对这些微观结构变化的进一步研究可以提高合金的性能.
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