@Article{icces.2023.010116,
AUTHOR = {Sheng Qian, Qi Tong},
TITLE = {Damping Properties in Gradient Nano-Grained Metals},
JOURNAL = {The International Conference on Computational \& Experimental Engineering and Sciences},
VOLUME = {27},
YEAR = {2023},
NUMBER = {3},
PAGES = {1--1},
URL = {http://www.techscience.com/icces/v27n3/55177},
ISSN = {1933-2815},
ABSTRACT = {Applications such as aircrafts and electronic devices require the noise and vibration reduction without much 
extra burden, such as extra damping systems. High damping metallic materials that exhibit the ability to 
dissipate mechanical energy are potential candidates in these application via directly being part of the 
functional components, such as the frame materials. The energy damping in polycrystalline metals depends 
on the activities of defects such as dislocation and grain boundary. However, operating defects has the 
opposite effect on strength and damping capacity. In the quest for high damping metals, maintaining the 
level of strength is desirable in practice. In this work, we reveal through atomistic simulations that the 
gradient nano-grained metals exhibit enhanced damping capacities compared with the homogeneous 
counterparts [1]. The property can be attributed to the long-range order of GB orientations in gradient 
grains, where shear stresses facilitate GB sliding. Without compromise the mechanical properties, the 
gradient structure achieves a strength-ductility-damping synergy. The results provide promising solutions 
to the conflicts between mechanical properties and damping capacity in polycrystalline metals.},
DOI = {10.32604/icces.2023.010116}
}