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Anomalous strain-energy-driven macroscale translation of grains during nonisothermal annealing
Physical Review Materials ( IF 3.1 ) Pub Date : 2021-07-21 , DOI: 10.1103/physrevmaterials.5.l070401 M. J. Higgins 1 , J. Kang 2 , G. Huang 1 , D. Montiel 1 , N. Lu 1 , H. Liu 3 , Y-F. Shen 3 , P. Staublin 4 , J.-S. Park 5 , J. D. Almer 5 , P. Kenesei 5 , P. G. Sanders 4 , R. M. Suter 3 , K. Thornton 1 , A. J. Shahani 1
Physical Review Materials ( IF 3.1 ) Pub Date : 2021-07-21 , DOI: 10.1103/physrevmaterials.5.l070401 M. J. Higgins 1 , J. Kang 2 , G. Huang 1 , D. Montiel 1 , N. Lu 1 , H. Liu 3 , Y-F. Shen 3 , P. Staublin 4 , J.-S. Park 5 , J. D. Almer 5 , P. Kenesei 5 , P. G. Sanders 4 , R. M. Suter 3 , K. Thornton 1 , A. J. Shahani 1
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We report a mode of grain growth, involving the macroscopic translation of grain centers during nonisothermal annealing. Through synchrotron high-energy x-ray diffraction microscopy, we find dissolution of semicoherent precipitates generates dislocations, thereby raising the stored strain energy within grains. The subsequent evolution of grains shows unexpected grain translations over length scales of 10–100 μm. Phase-field simulations reveal that such translations are not uncommon in strain-energy-driven grain growth, wherein different regions of a grain may grow and shrink simultaneously.
中文翻译：
非等温退火过程中晶粒的异常应变能驱动的宏观平移
我们报告了一种晶粒生长模式，涉及非等温退火过程中晶粒中心的宏观平移。通过同步加速器高能 X 射线衍射显微镜，我们发现半相干沉淀物的溶解会产生位错，从而提高晶粒内储存的应变能。晶粒的后续演变显示出意外的晶粒平移超过 10-100 μm 的长度尺度。相场模拟表明，这种平移在应变能驱动的晶粒生长中并不少见，其中晶粒的不同区域可能同时生长和收缩。
更新日期：2021-07-21
中文翻译：
非等温退火过程中晶粒的异常应变能驱动的宏观平移
我们报告了一种晶粒生长模式，涉及非等温退火过程中晶粒中心的宏观平移。通过同步加速器高能 X 射线衍射显微镜，我们发现半相干沉淀物的溶解会产生位错，从而提高晶粒内储存的应变能。晶粒的后续演变显示出意外的晶粒平移超过 10-100 μm 的长度尺度。相场模拟表明，这种平移在应变能驱动的晶粒生长中并不少见，其中晶粒的不同区域可能同时生长和收缩。
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