TY - JOUR

T1 - Review on superior strength and enhanced ductility of metallic nanomaterials

AU - Ovid'ko, I. A.

AU - Valiev, R. Z.

AU - Zhu, Y. T.

PY - 2018/5/1

Y1 - 2018/5/1

N2 - Nanostructured metallic materials having nanocrystalline and ultrafine-grained structures show exceptional mechanical properties, e.g. superior strength, that are very attractive for various applications. However, superstrong metallic nanomaterials typically have low ductility at ambient temperatures, which significantly limits their applications. Nevertheless, several examples of nanostructured metals and alloys with concurrent high strength and good ductility have been reported. Such strong and ductile materials are ideal for a broad range of structural applications in transportation, medicine, energy, etc. Strong and ductile metallic nanomaterials are also important for functional applications where these properties are critical for the lifetime of nanomaterial-based devices. This article presents an overview of experimental data and theoretical concepts addressing the unique combination of superior strength and enhanced ductility of metallic nanomaterials. We consider the basic approaches and methods for simultaneously optimizing their strength and ductility, employing principal deformation mechanisms, crystallographic texture, chemical composition as well as second-phase nano-precipitates, carbon nanotubes and graphene. Examples of achieving such superior properties in industrial materials are reviewed and discussed.

AB - Nanostructured metallic materials having nanocrystalline and ultrafine-grained structures show exceptional mechanical properties, e.g. superior strength, that are very attractive for various applications. However, superstrong metallic nanomaterials typically have low ductility at ambient temperatures, which significantly limits their applications. Nevertheless, several examples of nanostructured metals and alloys with concurrent high strength and good ductility have been reported. Such strong and ductile materials are ideal for a broad range of structural applications in transportation, medicine, energy, etc. Strong and ductile metallic nanomaterials are also important for functional applications where these properties are critical for the lifetime of nanomaterial-based devices. This article presents an overview of experimental data and theoretical concepts addressing the unique combination of superior strength and enhanced ductility of metallic nanomaterials. We consider the basic approaches and methods for simultaneously optimizing their strength and ductility, employing principal deformation mechanisms, crystallographic texture, chemical composition as well as second-phase nano-precipitates, carbon nanotubes and graphene. Examples of achieving such superior properties in industrial materials are reviewed and discussed.

KW - Deformation

KW - Dislocations

KW - Ductility

KW - Fracture

KW - Grain boundaries

KW - Heterostructure

KW - Metals

KW - Nanostructured materials

KW - Strength

KW - Twins

KW - SPECIAL ROTATIONAL DEFORMATION

KW - STRAIN GRADIENT PLASTICITY

KW - HIGH-PRESSURE TORSION

KW - IN-SITU TEM

KW - BULK NANOSTRUCTURED MATERIALS

KW - MOLECULAR-DYNAMICS SIMULATION

KW - CENTERED-CUBIC METALS

KW - NANOCRYSTALLINE FCC METALS

KW - SEVERE PLASTIC-DEFORMATION

KW - ULTRAFINE-GRAINED MATERIALS

UR - http://www.scopus.com/inward/record.url?scp=85042183430&partnerID=8YFLogxK

UR - http://www.mendeley.com/research/review-superior-strength-enhanced-ductility-metallic-nanomaterials

U2 - 10.1016/j.pmatsci.2018.02.002

DO - 10.1016/j.pmatsci.2018.02.002

M3 - Review article

AN - SCOPUS:85042183430

VL - 94

SP - 462

EP - 540

JO - Progress in Materials Science

JF - Progress in Materials Science

SN - 0079-6425

ER -