The integration of experimental in‐situ EBSD observations and numerical simulations: a novel technique of microstructural process analysis
The integration of experimental in‐situ EBSD observations and numerical simulations: a novel technique of microstructural process analysis
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实验原位 EBSD 观测与数值模拟的集成：微观结构过程分析的新技术
DOI：
10.1111/j.0022-2720.2004.01304.x
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发表时间：
2004
影响因子：
2
通讯作者：
P. Bons
中科院分区：
文献类型：
--
作者：
S. Piazolo;M. Jessell;David J. Prior;P. Bons
在原位加热实验和等效微观组织发展的数值模拟中收集的亚晶级和晶粒级微观组织数据的结合，为促进对微观组织过程的理解提供了一种创新和强大的工具。我们提出了一个系统，该系统完全集成了在扫描电子显微镜和二维混合数值模拟系统Elle加热实验期间的原位观察中获得的亚晶粒尺度到晶粒尺度的晶体学数据。这样的系统提供了独特的机会来测试和验证微观结构发展的理论，因为通过数值模拟做出的预测可以直接与适当的物理实验相结合，反过来，实验观察的理论解释应该可以通过数值模拟进行测试。用这两种技术获得的数据之间的差异表明需要进行深入的调查，从而开辟理论发展、修改和验证的新途径。此外，由于在数值模型中可以选择模拟的过程，因此可以量化单个过程对特定材料微观结构发展的影响。为了说明所谓的EBSD2Elle系统的潜力和方法，提出了两个原位实验和它们的等效数值实验。这些是静态加热实验(a)与晶粒生长前沿跟踪模型相结合的退火镍箔和(b)与亚晶粒生长动力学蒙特卡罗模拟的冷变形岩盐。
The combination of subgrain‐ and grain‐scale microstructural data collected during in‐situ heating experiments and numerical simulations of equivalent microstructural development offers an innovative and powerful tool in the advancement of the understanding of microstructural processes. We present a system that fully integrates subgrain‐ to grain‐scale crystallographic data obtained during in‐situ observations during heating experiments in a scanning electron microscope and the two‐dimensional hybrid numerical modelling system Elle. Such a system offers the unique opportunity to test and verify theories for microstructural development, as predictions made by numerical simulations can be directly coupled to appropriate physical experiments and, conversely, theoretical explanations of experimental observations should be testable with numerical simulations. Discrepancies between data obtained with both techniques suggest the need for an in‐depth investigation and thus open up new avenues of theory development, modification and verification. In addition, because in numerical models it is possible to select the processes modelled, the effect of individual processes on the microstructural development of a specific material can be quantified. To illustrate the potential and methodology of the so‐called EBSD2Elle system, two in‐situ experiments and their equivalent numerical experiments are presented. These are static heating experiments of (a) an annealed Ni‐foil coupled with a front tracking model for grain growth and (b) a cold deformed rock salt with kinetic Monte Carlo simulations for subgrain growth.