Influence of Nanoscale Inhomogeneity Incorporating Interface Effect on Crack Nucleation at Intersection of Twin and Grain Boundary in Nanocomposite

Nanocracks can generate at the intersection of the deformation twin and grain boundary (GB). A mathematical model is built to study the nanoinhomogeneity effect on nanocrack nucleation and propagation in the nanocrystalline matrix. The boundary condition at the interface between the nanoinhomogeneit...

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Autores principales:	Yongshu Tao, Liang Li, Guanghong Miao, Jilei Dong
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	nanocomposite crack twin nanoinhomogeneity interface effect Technology T Electrical engineering. Electronics. Nuclear engineering TK1-9971 Engineering (General). Civil engineering (General) TA1-2040 Microscopy QH201-278.5 Descriptive and experimental mechanics QC120-168.85
Acceso en línea:	https://doaj.org/article/10ac20fa7a524de78ebaebed975681be
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spelling	oai:doaj.org-article:10ac20fa7a524de78ebaebed975681be2021-11-11T18:13:13ZInfluence of Nanoscale Inhomogeneity Incorporating Interface Effect on Crack Nucleation at Intersection of Twin and Grain Boundary in Nanocomposite10.3390/ma142167181996-1944https://doaj.org/article/10ac20fa7a524de78ebaebed975681be2021-11-01T00:00:00Zhttps://www.mdpi.com/1996-1944/14/21/6718https://doaj.org/toc/1996-1944Nanocracks can generate at the intersection of the deformation twin and grain boundary (GB). A mathematical model is built to study the nanoinhomogeneity effect on nanocrack nucleation and propagation in the nanocrystalline matrix. The boundary condition at the interface between the nanoinhomogeneity and the matrix is modified by incorporating the interface effect. The influence of the nanoinhomogeneity shear modulus, the nanoinhomogeneity radius, the nanoinhomogeneity position, the interface effect, and the external stress on the nanocrack nucleation and propagation is investigated in detail. The results indicate that the stiff nanoinhomogeneity suppresses nanocrack nucleation and propagation and thereby improves the tensile ductility of nanocomposites without loss of their predominantly high strength. Both the positive interface residual tension and interface elastic constants suppress nanocrack nucleation and propagation, while the negative interface residual tension and interface elastic constants promote nanocrack nucleation and propagation. Furthermore, the effect of interface residual tension is rather significant. The interface elastic constants have a weak effect on nanocrack nucleation and propagation.Yongshu TaoLiang LiGuanghong MiaoJilei DongMDPI AGarticlenanocompositecracktwinnanoinhomogeneityinterface effectTechnologyTElectrical engineering. Electronics. Nuclear engineeringTK1-9971Engineering (General). Civil engineering (General)TA1-2040MicroscopyQH201-278.5Descriptive and experimental mechanicsQC120-168.85ENMaterials, Vol 14, Iss 6718, p 6718 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	nanocomposite crack twin nanoinhomogeneity interface effect Technology T Electrical engineering. Electronics. Nuclear engineering TK1-9971 Engineering (General). Civil engineering (General) TA1-2040 Microscopy QH201-278.5 Descriptive and experimental mechanics QC120-168.85
spellingShingle	nanocomposite crack twin nanoinhomogeneity interface effect Technology T Electrical engineering. Electronics. Nuclear engineering TK1-9971 Engineering (General). Civil engineering (General) TA1-2040 Microscopy QH201-278.5 Descriptive and experimental mechanics QC120-168.85 Yongshu Tao Liang Li Guanghong Miao Jilei Dong Influence of Nanoscale Inhomogeneity Incorporating Interface Effect on Crack Nucleation at Intersection of Twin and Grain Boundary in Nanocomposite
description	Nanocracks can generate at the intersection of the deformation twin and grain boundary (GB). A mathematical model is built to study the nanoinhomogeneity effect on nanocrack nucleation and propagation in the nanocrystalline matrix. The boundary condition at the interface between the nanoinhomogeneity and the matrix is modified by incorporating the interface effect. The influence of the nanoinhomogeneity shear modulus, the nanoinhomogeneity radius, the nanoinhomogeneity position, the interface effect, and the external stress on the nanocrack nucleation and propagation is investigated in detail. The results indicate that the stiff nanoinhomogeneity suppresses nanocrack nucleation and propagation and thereby improves the tensile ductility of nanocomposites without loss of their predominantly high strength. Both the positive interface residual tension and interface elastic constants suppress nanocrack nucleation and propagation, while the negative interface residual tension and interface elastic constants promote nanocrack nucleation and propagation. Furthermore, the effect of interface residual tension is rather significant. The interface elastic constants have a weak effect on nanocrack nucleation and propagation.
format	article
author	Yongshu Tao Liang Li Guanghong Miao Jilei Dong
author_facet	Yongshu Tao Liang Li Guanghong Miao Jilei Dong
author_sort	Yongshu Tao
title	Influence of Nanoscale Inhomogeneity Incorporating Interface Effect on Crack Nucleation at Intersection of Twin and Grain Boundary in Nanocomposite
title_short	Influence of Nanoscale Inhomogeneity Incorporating Interface Effect on Crack Nucleation at Intersection of Twin and Grain Boundary in Nanocomposite
title_full	Influence of Nanoscale Inhomogeneity Incorporating Interface Effect on Crack Nucleation at Intersection of Twin and Grain Boundary in Nanocomposite
title_fullStr	Influence of Nanoscale Inhomogeneity Incorporating Interface Effect on Crack Nucleation at Intersection of Twin and Grain Boundary in Nanocomposite
title_full_unstemmed	Influence of Nanoscale Inhomogeneity Incorporating Interface Effect on Crack Nucleation at Intersection of Twin and Grain Boundary in Nanocomposite
title_sort	influence of nanoscale inhomogeneity incorporating interface effect on crack nucleation at intersection of twin and grain boundary in nanocomposite
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/10ac20fa7a524de78ebaebed975681be
work_keys_str_mv	AT yongshutao influenceofnanoscaleinhomogeneityincorporatinginterfaceeffectoncracknucleationatintersectionoftwinandgrainboundaryinnanocomposite AT liangli influenceofnanoscaleinhomogeneityincorporatinginterfaceeffectoncracknucleationatintersectionoftwinandgrainboundaryinnanocomposite AT guanghongmiao influenceofnanoscaleinhomogeneityincorporatinginterfaceeffectoncracknucleationatintersectionoftwinandgrainboundaryinnanocomposite AT jileidong influenceofnanoscaleinhomogeneityincorporatinginterfaceeffectoncracknucleationatintersectionoftwinandgrainboundaryinnanocomposite
_version_	1718431866397130752

Influence of Nanoscale Inhomogeneity Incorporating Interface Effect on Crack Nucleation at Intersection of Twin and Grain Boundary in Nanocomposite

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