作者：Ndembi, Nicaise; Karim, Salim S. Abdool
作者单位：University of Kwazulu Natal; Columbia University
作者：Nusbaum, Howard
作者单位：University of Chicago; University of Chicago
作者：Wong, Gifford J.
作者单位：Science & Technology Policy Institute
作者：Tian, Yuan; Gong, Xiaoguo; Xu, Mingjie; Qiu, Caihao; Han, Ying; Bi, Yutong; Estrada, Leonardo Velasco; Boltynjuk, Evgeniy; Hahn, Horst; Han, Jian; Srolovitz, David J.; Pan, Xiaoqing
作者单位：University of California System; University of California Irvine; University of Hong Kong; University of California System; University of California Irvine; City University of Hong Kong; Helmholtz Association; Karlsruhe Institute of Technology; University of Oklahoma System; University of Oklahoma - Norman; University of Hong Kong; University of California System; University of California Irvine
摘要：Near-rigid-body grain rotation is commonly observed during grain growth, recrystallization, and plastic deformation in nanocrystalline materials. Despite decades of research, the dominant mechanisms underlying grain rotation remain enigmatic. We present direct evidence that grain rotation occurs through the motion of disconnections (line defects with step and dislocation character) along grain boundaries in platinum thin films. State-of-the-art in situ four-dimensional scanning transmission el...
