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Inapparent Strengthening Effect of Twin Interface in Cu/Pd Multilayered Films with a Large Lattice Mismatch.
Nanomaterials (Basel). 2019 Dec 13; 9(12)N

Abstract

It has been found that there are two kinds of interfaces in a Cu/Pd multilayered film, namely, cube-on-cube and twin. However, the effects of the interfacial structure and modulation period on the mechanical properties of a Cu/Pd multilayered film remain unclear. In this work, molecular dynamics simulations of Cu/Pd multilayered film with different interfaces and modulation periods under in-plane tension are performed to investigate the effects of the interfacial structure and modulation period. The interface misfit dislocation net exhibits a periodic triangular distribution, while the residual internal stress can be released through the bending of dislocation lines. With the increase of the modulation period, the maximum stress shows an upward trend, while the flow stress declines. It was found that the maximum stress and flow stress of the sample with a cube-on-cube interface is higher than that of the sample with a twin interface, which is different from the traditional cognition. This unusual phenomenon is mainly attributed to the discontinuity and unevenness of the twin boundaries caused by the extremely severe lattice mismatch.

Authors+Show Affiliations

Department of Engineering Mechanics, Chongqing University, Chongqing 400044, China.Department of Engineering Mechanics, Chongqing University, Chongqing 400044, China. Advanced Manufacturing Engineering, Chongqing University of Posts and Telecommunications, Chongqing 400065, China.Department of Engineering Mechanics, Chongqing University, Chongqing 400044, China.Department of Engineering Mechanics, Chongqing University, Chongqing 400044, China.Department of Engineering Mechanics, Chongqing University, Chongqing 400044, China. State Key Laboratory of Coal Mine Disaster Dynamics and Control, Chongqing University, Chongqing 400044, China.

Pub Type(s)

Journal Article

Language

eng

PubMed ID

31847293

Citation

Weng, Shayuan, et al. "Inapparent Strengthening Effect of Twin Interface in Cu/Pd Multilayered Films With a Large Lattice Mismatch." Nanomaterials (Basel, Switzerland), vol. 9, no. 12, 2019.
Weng S, Chen X, Yue X, et al. Inapparent Strengthening Effect of Twin Interface in Cu/Pd Multilayered Films with a Large Lattice Mismatch. Nanomaterials (Basel). 2019;9(12).
Weng, S., Chen, X., Yue, X., Fu, T., & Peng, X. (2019). Inapparent Strengthening Effect of Twin Interface in Cu/Pd Multilayered Films with a Large Lattice Mismatch. Nanomaterials (Basel, Switzerland), 9(12). https://doi.org/10.3390/nano9121778
Weng S, et al. Inapparent Strengthening Effect of Twin Interface in Cu/Pd Multilayered Films With a Large Lattice Mismatch. Nanomaterials (Basel). 2019 Dec 13;9(12) PubMed PMID: 31847293.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Inapparent Strengthening Effect of Twin Interface in Cu/Pd Multilayered Films with a Large Lattice Mismatch. AU - Weng,Shayuan, AU - Chen,Xiang, AU - Yue,Xing, AU - Fu,Tao, AU - Peng,Xianghe, Y1 - 2019/12/13/ PY - 2019/11/08/received PY - 2019/12/03/revised PY - 2019/12/07/accepted PY - 2019/12/19/entrez PY - 2019/12/19/pubmed PY - 2019/12/19/medline KW - interfacial structure KW - modulation period KW - molecular dynamics KW - twin interface JF - Nanomaterials (Basel, Switzerland) JO - Nanomaterials (Basel) VL - 9 IS - 12 N2 - It has been found that there are two kinds of interfaces in a Cu/Pd multilayered film, namely, cube-on-cube and twin. However, the effects of the interfacial structure and modulation period on the mechanical properties of a Cu/Pd multilayered film remain unclear. In this work, molecular dynamics simulations of Cu/Pd multilayered film with different interfaces and modulation periods under in-plane tension are performed to investigate the effects of the interfacial structure and modulation period. The interface misfit dislocation net exhibits a periodic triangular distribution, while the residual internal stress can be released through the bending of dislocation lines. With the increase of the modulation period, the maximum stress shows an upward trend, while the flow stress declines. It was found that the maximum stress and flow stress of the sample with a cube-on-cube interface is higher than that of the sample with a twin interface, which is different from the traditional cognition. This unusual phenomenon is mainly attributed to the discontinuity and unevenness of the twin boundaries caused by the extremely severe lattice mismatch. SN - 2079-4991 UR - https://www.unboundmedicine.com/medline/citation/31847293/Inapparent_Strengthening_Effect_of_Twin_Interface_in_Cu/Pd_Multilayered_Films_with_a_Large_Lattice_Mismatch_ L2 - http://www.mdpi.com/resolver?pii=nano9121778 DB - PRIME DP - Unbound Medicine ER -
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