基于高温流动行为的A100钢的新构成模型和热加工图
Chaoyuan Sun1,2, Yi Qin1, Yang Liu2
1Chongqing Key Laboratory of Advanced Mold Intelligent Manufacturing, College of Materials Science and Engineering, Chongqing University, Chongqing, 400044, China.
Heliyon
|December 24, 2024
概括
研究人员开发了一个A100钢的构成模型和热加工地图. 最佳的热成型窗口,以动态再结晶为特征,被确定为改进的机械性能.
科学领域:
- 材料科学 材料科学 材料科学
- 金工业是一种金工业.
- 机械工程 机械工程
背景情况:
- 了解A100等先进钢的热加工行为对于优化制造工艺至关重要.
- 准确的构成模型对于预测热力学处理过程中的材料流和微观结构演变至关重要.
研究的目的:
- 为A100钢的流动行为开发一个预测性构成模型.
- 建立热加工地图,以确定A100钢的最佳加工窗口.
- 为了将处理参数与动态再结晶和产生的微观结构相关联.
主要方法:
- 同热压缩试验是在1073到1353K的温度下进行的,并且应变速率在0.01到10s-1.1之间.
- 使用真实应力-应变数据建立了一个构成模型和一个热处理图.
- 分析的重点是能量消耗率及其与动态再结晶的关系.
主要成果:
- 具有0.9913的相关系数的构成模型准确地预测了A100钢的流动行为.
- 当能量消散率超过25%时,会发生动态再结晶,从而产生均的等轴粒状结构.
- 不稳定的加工区域 (高拉伸率,低温度) 会导致粗的,延长的微观结构,损害机械性能.
结论:
- 开发的构成模型为A100钢流动行为提供了出色的预测能力.
- 对A100钢的最佳热成型窗口被确定为1153-1353K和0.01-10s-1,促进了完全的动态再结晶.
- 避免不稳定的加工条件对于在热成型A100钢中实现理想的微观结构和机械性能至关重要.
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