Mesoscopic superelasticity, superplasticity, and superrigidity
Mesoscopic superelasticity, superplasticity, and superrigidity
复制标题
细观超弹性、超塑性和超刚性
DOI:
10.1007/s11433-012-4662-4
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发表时间:
2012-04
期刊:
影响因子:
--
通讯作者:
C. Q. Sun
中科院分区:
文献类型:
--
作者:
Ma, Z.;Z. Zhou;Y. Huang;Y. Zhou;C. Q. Sun
Atomic-undercoordination-induced local bond contraction, bond strength gain, and the associated temperature (T)-dependent atomic-cohesive-energy and binding-energy-density are shown to originate intrinsically the exotic paradox of superplasticity, superelasticity, and superrigidity demonstrated by solid sizing from monatomic chain to mesoscopic grain. The paradox follows these relationships: where A, B, η 1, d and ΔT mk = T m (K)−T are size (K)-dependent physical parameters. T m(K) is the melting point. Mechanical work hardening during compressing and self-heating during stretching modulate the measured outcome extrinsically. Superplasticity dominates in the solid-quasimolten-liquid transition state. The competition between the accumulation and annihilation of dislocations activates the inverse Hall-Petch relationship. Therefore, it is essential for one to discriminate the intrinsic competition between the local bond energy density gain and the atomic cohesive energy loss from the extrinsic factors of pressure and temperature in dealing with atomistic mechano-thermo dynamics.
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影响因子:
--
作者:
Changzhi Sun
通讯作者:
Changzhi Sun
DOI:
10.1007/s11433-011-4299-8
发表时间:
2011-03
期刊:
Science China Physics,Mechanics & Astonomy
影响因子:
--
作者:
Wang ZQ;Zhao YP
通讯作者:
Zhao YP
影响因子:
3.7
作者:
J. Armstrong;R. Schaub;S. Hua;H. D. Chopra
通讯作者:
J. Armstrong;R. Schaub;S. Hua;H. D. Chopra
影响因子:
9.9
作者:
F. Xu;Q. Qin;A. Mishra;Y. Gu;Yong Zhu
通讯作者:
F. Xu;Q. Qin;A. Mishra;Y. Gu;Yong Zhu
影响因子:
3.9
作者:
Sun, Chang Q.;Nie, Yanguang;Pan, Jisheng;Zhang, Xi;Ma, S. Z.;Wang, Yan;Zheng, Weitao
通讯作者:
Zheng, Weitao