TY - JOUR
T1 - Contribution of dislocation pileups to acoustic nonlinearity parameter
AU - Gao, Xiang
AU - Qu, Jianmin
N1 - Publisher Copyright:
© 2019 Author(s).
PY - 2019/6/7
Y1 - 2019/6/7
N2 - This paper develops an analytical model to calculate the acoustic nonlinearity parameter induced by dislocation pileups in isotropic elastic solids. It shows that the pileup-induced acoustic nonlinearity parameter depends on the pileup length, number of dislocations in a pileup, Burgers vector, and dislocation density. Additionally, it is found that the formula for pileup-induced acoustic nonlinearity parameter has a similar mathematical form to those for other types of defects such as dislocation strings, dislocation dipoles, and extended dislocations. They are all scaled with a dimensionless parameter (L c h / b) n, where L c h is a characteristic length of the defect, b is the magnitude of the Burgers vector, and n is either 3 or 4.
AB - This paper develops an analytical model to calculate the acoustic nonlinearity parameter induced by dislocation pileups in isotropic elastic solids. It shows that the pileup-induced acoustic nonlinearity parameter depends on the pileup length, number of dislocations in a pileup, Burgers vector, and dislocation density. Additionally, it is found that the formula for pileup-induced acoustic nonlinearity parameter has a similar mathematical form to those for other types of defects such as dislocation strings, dislocation dipoles, and extended dislocations. They are all scaled with a dimensionless parameter (L c h / b) n, where L c h is a characteristic length of the defect, b is the magnitude of the Burgers vector, and n is either 3 or 4.
UR - http://www.scopus.com/inward/record.url?scp=85066938239&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85066938239&partnerID=8YFLogxK
U2 - 10.1063/1.5095135
DO - 10.1063/1.5095135
M3 - Article
AN - SCOPUS:85066938239
SN - 0021-8979
VL - 125
JO - Journal of Applied Physics
JF - Journal of Applied Physics
IS - 21
M1 - 215104
ER -