Ti65合金的构成模型和微观结构演变
Tao Sun1, Lili Sun1, Haihao Teng1
1College of Materials Science and Engineering, Chongqing University, Chongqing 400044, China.
Materials (Basel, Switzerland)
|May 25, 2024
概括
这项研究研究了Ti65合金.
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.
- 机械工程 机械工程
背景情况:
- 了解Ti65合金的热变形行为对于优化制造工艺至关重要.
- 具有双模微结构的Ti65合金在不同的热力学条件下表现出复杂的变形机制.
研究的目的:
- 为了研究Ti65合金具有双模微观结构的热变形行为和机制.
- 建立和比较Arrhenius和灰狼优化神经网络与反向传播 (GWO-BP) 模型的流应力预测精度.
- 阐明热加工过程中的微观结构演变和变形机制.
主要方法:
- 同热压缩实验是在Thermecmastor-Z模拟器上进行的.
- 温度在950至1110°C之间,应变率在0.01至10.0s-1之间.
- 构成模型 (Arrhenius和GWO-BP) 被开发并根据实验数据进行验证.
主要成果:
- 在两相区域中,GWO-BP模型的预测准确性高于Arrhenius模型.
- 与单相区域相比,双相区域的流量应力表现出更大的软化.
- 微结构进化包括通过边界分裂的状α相转化为球状地形,以及不同的再结晶机制 (在高应变率下不连续的动态再结晶).
结论:
- GWO-BP模型为Ti65合金在两相区域中提供了优越的流量应力预测.
- 变形机制是应变速率和相位依赖的,涉及球化和不同类型的再结晶.
- 这些发现为控制Ti65合金在热加工过程中的微观结构和性能提供了洞察力.
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