一个TiB2/Al-Zn-Mg-Cu-Zr复合材料的热变形行为和微结构演变
Jingcun Huang1, Zhilei Xiang1, Meng Li1
1Faculty of Materials and Manufacturing, Beijing University of Technology, Beijing 100124, China.
Materials (Basel, Switzerland)
|April 13, 2024
概括
这项研究研究了TiB2/Al-Zn-Mg-Cu-Zr复合材料的热变形. 最佳加工发生在370-490°C和0.001-0.025s-1之间,而应变率是安全加工的主要因素.
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.
- 复合材料 复合材料 复合材料
背景情况:
- 合金对各种行业至关重要.
- 二氧化 (TiB2) 增强增强了基质复合材料.
- 了解热变形是优化复合材料加工的关键.
研究的目的:
- 为了研究TiB2/Al-Zn-Mg-Cu-Zr复合材料的热变形行为.
- 建立构成方程和处理地图.
- 在热加工过程中分析微观结构的演变.
主要方法:
- 热压缩测试在370-490°C的温度范围内进行,应变速率从0.001-10s-1.1之间.
- 确定了阿雷尼乌斯组成方程和泽纳-霍洛蒙参数.
- 制作加工地图,以确定安全加工区.
主要成果:
- 安全处理窗口被确定为370-490°C和0.001-0.025s-1.1.
- 应变速率显著影响安全处理范围,归因于TiB2.
- 动态回收 (DRV) 是主要的软化机制,通过固定颗粒来帮助.
- 动态再结晶 (DRX),包括连续 (CDRX) 和不连续 (DDRX),在较高的温度和较低的应变率下得到促进.
- TiB2和第二阶段粒子诱导几何上必要的位移 (GNBs),促进DDRX并改善可塑性.
结论:
- 该研究确定了TiB2/Al-Zn-Mg-Cu-Zr复合材料的最佳热工作参数.
- 阐明了微观结构的进化,包括DRV和DRX.
- 这些发现有助于提高这些先进复合材料的可塑性和加工.
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