在一个大尺寸的Mg-9.4Gd-5.8Y-1Zn-0.5Zr合金中的微结构-属性调节,通过差相电磁半连续造和同质化
Yonghui Jia1, Fangkun Ning2, Yao Cheng1
1Key Laboratory of Light-Weight Materials, Nanjing Tech University, Nanjing 210009, China.
Materials (Basel, Switzerland)
|January 28, 2026
概括
这项研究使用先进的造来制造大规模的合金片. 该过程产生了高度均的微观结构和最佳的强度-柔性平衡,这对于先进的材料应用至关重要.
科学领域:
- 材料科学 材料科学 材料科学
- 金工程 金工程 金工程
背景情况:
- 开发具有增强性能的大规模合金对于航空航天和汽车行业至关重要.
- 在Mg-Gd-Y-Zn-Zr合金中实现微观结构均性和最佳机械性能存在重大挑战.
研究的目的:
- 使用一种新型造方法制造一个大尺寸的Mg-9.4Gd-5.8Y-1Zn-0.5Zr合金切片.
- 研究不同相电磁振动造对微观结构均性和元素分布的影响.
- 优化热处理以改善机械性能和LPSO相位形成.
主要方法:
- 使用了一种具有独立初级冷却调节的新型半连续造模具.
- 采用差分相电磁振动造用于子制造 (Ø330毫米).
- 在520°C进行同质化处理,持续5小时.
- 分析了微观结构特征,包括粒径和元素分离.
- 评估拉伸强度和延伸,以确定机械性能.
主要成果:
- 成功制造了一个大尺寸的Mg-9.4Gd-5.8Y-1Zn-0.5Zr合金.
- 实现了显著的微观结构均性,颗粒大小从117微米到130微米.
- 将Gd和Y的元素分离降低到3%以下.
- 在同质化过程中,溶解了谷物边界的化阶段,并促进了合金元素的扩散.
- 精细的长期堆叠有序 (LPSO) 层的刺激沉.
结论:
- 不同相电磁振动造对于生产大尺寸,均的Mg-Gd-Y-Zn-Zr合金子是有效的.
- 同质化处理和随后的LPSO叶片沉是实现最佳强度-柔性平衡的关键.
- 制造的合金具有出色的抗拉强度 (208.4 MPa) 和延伸度 (24.4%),这表明它是适用于苛刻应用的有希望的材料.
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