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考虑到加热速率,复杂硬化和动态应变老化在AISI 1045加工中的影响:实验和模拟
Friedrich Bleicher1, Christian Baumann1, Stephan Krall1
1Institute of Production Engineering and Photonic Technologies, TU Wien, Austria.
CIRP annals ... manufacturing technology
|March 18, 2024
概括
一种用于AISI 1045钢的新材料模型准确模拟加工,捕捉了高速切割过程中的复杂行为,如塑料应变和温度变化.
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:
- 机械模拟需要构成模型,以考虑极端条件:高塑料应变,应变速率,温度和加热速率.
- 像约翰逊-库克这样的现有模型可能无法完全捕捉高速加工中常见的快速热力学循环下的材料反应.
研究的目的:
- 开发和验证AISI 1045钢的新构成材料模型.
- 准确模拟直角切割实验,特别关注快速加热和塑性变形下的材料行为.
主要方法:
- 开发了一个新的构成模型,结合了时间依赖的塑料反应,中断的奥氏体转化,复杂的应变硬化和动态应变老化效应.
- 使用新模型模拟了直角切割实验,并与标准的约翰逊-库克模型进行了比较.
- 使用高速视频和数字图像相关性来捕捉和分析芯片形成和实验期间的材料行为.
主要成果:
- 与基本的约翰逊-库克模型相比,新材料模型在高切割速度下与实验数据有更好的一致性.
- 该模型成功地捕获了材料在短时间加热和复杂的热力学条件下依赖时间的塑性反应.
- 在模拟中观察到的芯片行为与实验高速视频和数字图像相关数据更好地对齐.
结论:
- 开发的构成模型为在高速切割条件下模拟AISI 1045钢的加工提供了更高的精度.
- 该模型能够捕捉复杂的现象,如奥氏体转化和动态应变衰老,对于精确的加工模拟至关重要.
- 这一进步为预测和优化涉及类似钢合金的加工过程提供了更可靠的工具.
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