一项对Al 2024-T3合金工作表的损伤行为进行了深入的研究,该工作表在优越的实际条件下通过受约束槽压制制造
Faramarz Fereshteh-Saniee1, Sadegh Ghorbanhosseini1, Saeed Yaghoubi2
1Department of Mechanical Engineering, Faculty of Engineering, Bu-Ali Sina University, Hamedan, 65178, Iran.
Scientific reports
|August 1, 2024
概括
约束槽压缩 (CGP) 有效地提炼2024-T3合金板. 升高的温度对于成功的CGP至关重要,可以最大限度地减少损坏,并使超细粒度结构成为可能.
科学领域:
- 材料科学 材料科学 材料科学
- 机械工程 机械工程
- 制造过程 制造过程 制造过程
背景情况:
- 严重的塑性变形 (SPD) 对于创建超细粒度材料至关重要.
- 约束槽压缩 (CGP) 是一个高效的板金属的SPD技术.
- 2024-T3合金是一种广泛使用的航空航天材料,需要先进的加工.
研究的目的:
- 调查2024-T3合金板的CGP可行性和最佳条件.
- 分析温度对CGP过程和材料行为的影响.
- 为了评估损伤演变,应力三轴性和CGP期间的塑料应变分布.
主要方法:
- 使用Abaqus软件与约翰逊-库克材料模型进行实证测试和数值模拟.
- 优化CGP几何变量 (牙数量,角度,板厚) 使用Shannon的和简单的增量权衡 (SAW).
- 对损伤参数,应力三轴性和等效塑料应变 (PEEQ) 的分析.
主要成果:
- 用入-SAW方法确定了对等应变 (0.38) 和等效力 (0.62) 的最佳权重系数.
- 在室温下CGP导致高损伤演变,认为这是不可行的.
- 在高温下,损伤参数 (D) 保持在0.26以下,最大应力三轴性为0.5,PEEQ为0.1.
结论:
- 高温对于2024-T3合金板的成功CGP至关重要.
- 开发的方法提供了一个优化SPD流程的框架.
- 在最佳的高温下,CGP可以有效地产生超细粒度结构,并可控制损坏.
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