Ductility enhancement of layered stainless steel with nanograined interface layers

X. Guo; G. J. Weng; A. K. Soh

doi:10.1016/j.commatsci.2011.11.014

Ductility enhancement of layered stainless steel with nanograined interface layers

X. Guo, G. J. Weng, A. K. Soh

School of Engineering, Mechanical & Aerospace Engineering

Research output: Contribution to journal › Article › peer-review

30 Scopus citations

Abstract

Combination of surface mechanical attrition treatment (SMAT) and co-rolling is a promising experimental methodology to design metals with high strength and high ductility. Recent results have revealed that brittle nanograined interface layer (NGIL) can enhance the ductility of the co-rolled SMATed stainless steel (SS). In the present study, the cohesive finite element method is used to show that the SS ductility is significantly enhanced with the increase of fracture toughness of coarse-grained layers and failure strain of NGIL. However the ductility will not increase if the NGIL thickness goes beyond 60 μm.

Original language	English (US)
Pages (from-to)	350-355
Number of pages	6
Journal	Computational Materials Science
Volume	55
DOIs	https://doi.org/10.1016/j.commatsci.2011.11.014
State	Published - Apr 2012

All Science Journal Classification (ASJC) codes

Computer Science(all)
Chemistry(all)
Materials Science(all)
Mechanics of Materials
Physics and Astronomy(all)
Computational Mathematics

Keywords

Cohesive finite element method
Enhanced ductility
Interface
Mechanical attrition treatment
Nanograined interface layer

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10.1016/j.commatsci.2011.11.014

Cite this

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title = "Ductility enhancement of layered stainless steel with nanograined interface layers",

abstract = "Combination of surface mechanical attrition treatment (SMAT) and co-rolling is a promising experimental methodology to design metals with high strength and high ductility. Recent results have revealed that brittle nanograined interface layer (NGIL) can enhance the ductility of the co-rolled SMATed stainless steel (SS). In the present study, the cohesive finite element method is used to show that the SS ductility is significantly enhanced with the increase of fracture toughness of coarse-grained layers and failure strain of NGIL. However the ductility will not increase if the NGIL thickness goes beyond 60 μm.",

keywords = "Cohesive finite element method, Enhanced ductility, Interface, Mechanical attrition treatment, Nanograined interface layer",

author = "X. Guo and Weng, {G. J.} and Soh, {A. K.}",

note = "Funding Information: Support from the Research Grants Council of the Hong Kong Special Administrative Region (Project No. CityU8/CRF/08) is gratefully acknowledged. X. Guo also acknowledges the support from National Natural Science Foundation of China (Project No. 11102128), and G.J. Weng thanks the support of the HKU Visiting Research Professor Scheme 2010-2013. ",

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doi = "10.1016/j.commatsci.2011.11.014",

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AU - Guo, X.

AU - Weng, G. J.

AU - Soh, A. K.

N1 - Funding Information: Support from the Research Grants Council of the Hong Kong Special Administrative Region (Project No. CityU8/CRF/08) is gratefully acknowledged. X. Guo also acknowledges the support from National Natural Science Foundation of China (Project No. 11102128), and G.J. Weng thanks the support of the HKU Visiting Research Professor Scheme 2010-2013.

PY - 2012/4

Y1 - 2012/4

N2 - Combination of surface mechanical attrition treatment (SMAT) and co-rolling is a promising experimental methodology to design metals with high strength and high ductility. Recent results have revealed that brittle nanograined interface layer (NGIL) can enhance the ductility of the co-rolled SMATed stainless steel (SS). In the present study, the cohesive finite element method is used to show that the SS ductility is significantly enhanced with the increase of fracture toughness of coarse-grained layers and failure strain of NGIL. However the ductility will not increase if the NGIL thickness goes beyond 60 μm.

AB - Combination of surface mechanical attrition treatment (SMAT) and co-rolling is a promising experimental methodology to design metals with high strength and high ductility. Recent results have revealed that brittle nanograined interface layer (NGIL) can enhance the ductility of the co-rolled SMATed stainless steel (SS). In the present study, the cohesive finite element method is used to show that the SS ductility is significantly enhanced with the increase of fracture toughness of coarse-grained layers and failure strain of NGIL. However the ductility will not increase if the NGIL thickness goes beyond 60 μm.

KW - Cohesive finite element method

KW - Enhanced ductility

KW - Interface

KW - Mechanical attrition treatment

KW - Nanograined interface layer

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Ductility enhancement of layered stainless steel with nanograined interface layers

Abstract

All Science Journal Classification (ASJC) codes

Keywords

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