通过冷处理提高AA7075合金的可变性及其与微观结构演变和FE建模的相关性
Suwaree Chankitmunkong1, Dmitry G Eskin2, Ussadawut Patakham3
1Department of Industrial Engineering, School of Engineering, King Mongkut's Institute of Technology Ladkrabang, Chalongkrung Road, Ladkrabang, Bangkok, 10520, Thailand.
Scientific reports
|July 20, 2024
概括
低温处理显著增强AA7075合金的性能.
科学领域:
- 材料科学 材料科学 材料科学
- 机械工程 机械工程
- 金工业是金工业的一个方面.
背景情况:
- 低温处理提供了通过低温再结晶来改善材料变形行为的潜力.
- 了解合金在低温条件下变形对于先进制造至关重要.
研究的目的:
- 为了研究AA7075合金在冷条件下的变形行为.
- 分析微观结构的演变及其对机械性能的影响.
主要方法:
- 压缩试验以获得真正的应力-张力曲线.
- 电子反射衍射 (EBSD) 用于微观结构和纹理分析.
- 有限元分析 (FEA) 用于机械响应模拟.
主要成果:
- 低温变形使得产率应力从260到560MPa增加,应变硬化指数 (n) 从0.25到0.35.
- 在冷温度下阻碍了再结晶,导致长长的颗粒和细小颗粒.
- 在低温条件下,由于谷物精炼,FEA证实了更高的塑料等价菌株 (PEEQ).
结论:
- 低温处理显著改善了AA7075.5的流应力和应变硬化.
- 微观结构变化,包括谷物提炼,是增强变形的关键机制.
- 研究结果为改善复杂元件高强度合金的可塑性提供了洞察力.
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