Shear banding-induced (c plus a) slip enables unprecedented strength-ductility combination of laminated metallic composites

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61389005%3A_____%2F22%3A00557389" target="_blank" >RIV/61389005:_____/22:00557389 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/00216208:11320/22:10454122

Výsledek na webu

<a href="https://doi.org/10.1016/j.jmst.2021.09.032" target="_blank" >https://doi.org/10.1016/j.jmst.2021.09.032</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.jmst.2021.09.032" target="_blank" >10.1016/j.jmst.2021.09.032</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Shear banding-induced (c plus a) slip enables unprecedented strength-ductility combination of laminated metallic composites

Popis výsledku v původním jazyce

Shear bands in metallic materials have been reported to be catastrophic because they normally lead to non-uniform plastic deformation. Ductility of laminated metallic composites deteriorates with increasing processing strain, particularly for those having hexagonal-close-packed (hcp) constituents due to inadequate slip systems and consequently prominent shear banding. Here, we propose a design strategy that counterintuitively tolerates the bands with localized strains, i.e. the shear banded laminar (SBL) structure, which promotes ( c + a ) dislocation activation in hcp metals and renders unprecedented strengthductility combination in hcp-metal-based composites fabricated by accumulative roll bonding (ARB). The SBL structure is characterized with one soft hcp metal constrained by adjacent hard metal in which dislocations have been accumulated near the bimetal interfaces. High-energy X-ray diffraction astonishingly reveals that more than 90% of dislocations are non-basal in Ti layers of the SBL Ti/Nb composite processed by eight ARB cycles. Moreover, ( c+a ) dislocations occupy a high fraction of -30%, promoting further ( c+a ) cross slip. The unique stress field tailored by both shear banding and heterophase interface-mediated deformation accommodation triggers important ( c+a ) slip. This SBL design is of significance for developing hcp-based laminates and other heterostructured materials with high performances.

Název v anglickém jazyce

Shear banding-induced (c plus a) slip enables unprecedented strength-ductility combination of laminated metallic composites

Popis výsledku anglicky

Shear bands in metallic materials have been reported to be catastrophic because they normally lead to non-uniform plastic deformation. Ductility of laminated metallic composites deteriorates with increasing processing strain, particularly for those having hexagonal-close-packed (hcp) constituents due to inadequate slip systems and consequently prominent shear banding. Here, we propose a design strategy that counterintuitively tolerates the bands with localized strains, i.e. the shear banded laminar (SBL) structure, which promotes ( c + a ) dislocation activation in hcp metals and renders unprecedented strengthductility combination in hcp-metal-based composites fabricated by accumulative roll bonding (ARB). The SBL structure is characterized with one soft hcp metal constrained by adjacent hard metal in which dislocations have been accumulated near the bimetal interfaces. High-energy X-ray diffraction astonishingly reveals that more than 90% of dislocations are non-basal in Ti layers of the SBL Ti/Nb composite processed by eight ARB cycles. Moreover, ( c+a ) dislocations occupy a high fraction of -30%, promoting further ( c+a ) cross slip. The unique stress field tailored by both shear banding and heterophase interface-mediated deformation accommodation triggers important ( c+a ) slip. This SBL design is of significance for developing hcp-based laminates and other heterostructured materials with high performances.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

20505 - Composites (including laminates, reinforced plastics, cermets, combined natural and synthetic fibre fabrics; filled composites)

Projekt

Výsledek vznikl pri realizaci vícero projektů. Více informací v záložce Projekty.

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2022

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Journal of Materials Science & Technology

ISSN

1005-0302

e-ISSN

—

Svazek periodika

110

Číslo periodika v rámci svazku

MAY

Stát vydavatele periodika

CN - Čínská lidová republika

Počet stran výsledku

9

Strana od-do

260-268

Kód UT WoS článku

000788137200002

EID výsledku v databázi Scopus

2-s2.0-85120416204