Dislocation network in additive manufactured steel breaks strength–ductility trade-off

Research output: Contribution to journalArticle

Standard

Dislocation network in additive manufactured steel breaks strength–ductility trade-off. / Liu, Leifeng; Zhong, Yuan; Zou, Ji; Wu, Jing; Chiu, Yu-Lung; Shen, James Zhijian.

In: Materials Today, 06.12.2017.

Research output: Contribution to journalArticle

Harvard

APA

Vancouver

Author

Bibtex

@article{5292868cf0a8400781686d7b67075734,
title = "Dislocation network in additive manufactured steel breaks strength–ductility trade-off",
abstract = "Most mechanisms used for strengthening crystalline materials, e.g. introducing crystalline interfaces, lead to the reduction of ductility. An additive manufacturing process – selective laser melting breaks this trade-off by introducing dislocation network, which produces a stainless steel with both significantly enhanced strength and ductility. Systematic electron microscopy characterization reveals that the pre-existing dislocation network, which maintains its configuration during the entire plastic deformation, is an ideal “modulator” that is able to slow down but not entirely block the dislocation motion. It also promotes the formation of a high density of nano-twins during plastic deformation. This finding paves the way for developing high performance metals by tailoring the microstructure through additive manufacturing processes.",
author = "Leifeng Liu and Yuan Zhong and Ji Zou and Jing Wu and Yu-Lung Chiu and Shen, {James Zhijian}",
year = "2017",
month = dec
day = "6",
doi = "10.1016/j.mattod.2017.11.004",
language = "English",
journal = "Materials Today",
issn = "1369-7021",
publisher = "Elsevier",

}

RIS

TY - JOUR

T1 - Dislocation network in additive manufactured steel breaks strength–ductility trade-off

AU - Liu, Leifeng

AU - Zhong, Yuan

AU - Zou, Ji

AU - Wu, Jing

AU - Chiu, Yu-Lung

AU - Shen, James Zhijian

PY - 2017/12/6

Y1 - 2017/12/6

N2 - Most mechanisms used for strengthening crystalline materials, e.g. introducing crystalline interfaces, lead to the reduction of ductility. An additive manufacturing process – selective laser melting breaks this trade-off by introducing dislocation network, which produces a stainless steel with both significantly enhanced strength and ductility. Systematic electron microscopy characterization reveals that the pre-existing dislocation network, which maintains its configuration during the entire plastic deformation, is an ideal “modulator” that is able to slow down but not entirely block the dislocation motion. It also promotes the formation of a high density of nano-twins during plastic deformation. This finding paves the way for developing high performance metals by tailoring the microstructure through additive manufacturing processes.

AB - Most mechanisms used for strengthening crystalline materials, e.g. introducing crystalline interfaces, lead to the reduction of ductility. An additive manufacturing process – selective laser melting breaks this trade-off by introducing dislocation network, which produces a stainless steel with both significantly enhanced strength and ductility. Systematic electron microscopy characterization reveals that the pre-existing dislocation network, which maintains its configuration during the entire plastic deformation, is an ideal “modulator” that is able to slow down but not entirely block the dislocation motion. It also promotes the formation of a high density of nano-twins during plastic deformation. This finding paves the way for developing high performance metals by tailoring the microstructure through additive manufacturing processes.

U2 - 10.1016/j.mattod.2017.11.004

DO - 10.1016/j.mattod.2017.11.004

M3 - Article

JO - Materials Today

JF - Materials Today

SN - 1369-7021

ER -