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在高温压缩过程中,AA1050合金中的子粒大小建模和子结构演变

Qi Yang¹, Tomasz Wojcik¹, Ernst Kozeschnik¹

¹Institute of Materials Science and Technology, TU Wien, Getreidemarkt 9, 1060 Vienna, Austria.

Materials (Basel, Switzerland)

|September 14, 2024

概括

在合金中的动态回收和再结晶在塑性变形过程中提炼亚粒. 这项研究模拟了不同压缩下亚粒大小演变的模型,为材料行为提供了准确的预测.

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:

像合金这样的高堆叠故障能量 (SFE) 材料利用动态回收 (DRV) 和动态再结晶 (DRX) 在塑料变形过程中进行软化.
这些机制促进了亚粒的持续生成和精炼,这对于理解压力下的材料行为至关重要.

研究的目的:

为了研究压缩参数对1050合金在高温下亚体结构演变的影响.
开发和验证用于预测高温塑料变形期间平均亚粒大小演变的模型.

主要方法:

在压缩下对1050合金微结构进行实验研究,温度为300°C至500°C,应变速率为0.01至0.1s-1.1s.
应用和比较两个独立的平均亚粒大小演变模型:一个经验模型和一个基于子结构的模型.
在基结构模型中整合出位密度演变模型,以模拟亚粒精炼和热粗化.

主要成果:

在各种压缩条件下获得了平均亚粒大小的实验数据.
基于子结构的模型显示出高精度,相关系数 (R) 为0.98,根平均平方误差 (RMSE) 为5.7%.
两种模型都成功地使用物理上有意义的变量复制了预期的亚粒大小演变.

结论:

压缩参数在高温下显著影响1050合金中的亚结构演变和亚粒精炼.
开发的基于子结构的模型准确地预测了平均亚粒大小的演变,并纳入了物理变量.
这些模型提供了可靠的亚粒大小估计,有价值的预测材料性能在连续变形.

关键词:

合金是一种合金.高温压缩的高温压缩方式亚粒大小模型的模型子结构演变的演变.

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