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Achieving large linear elasticity and high strength in bulk nanocompsite via synergistic effect.

Hao S, Cui L, Guo F, Liu Y, Shi X, Jiang D, Brown DE, Ren Y - Sci Rep (2015)

Bottom Line: Developing bulk metallic materials showing large linear elasticity and high strength has proven to be difficult.It is demonstrated that the synergistic effect allows the exceptional mechanical properties of nanowires to be harvested at macro scale and the mechanical properties of matrix to be greatly improved, resulting in these superior properties.This study provides new avenues for developing advanced composites with superior properties by using effective synergistic effect between components.

View Article: PubMed Central - PubMed

Affiliation: State Key Laboratory of Heavy Oil Processing, China University of Petroleum, Beijing 102249, China.

ABSTRACT
Elastic strain in bulk metallic materials is usually limited to only a fraction of 1%. Developing bulk metallic materials showing large linear elasticity and high strength has proven to be difficult. Here, based on the synergistic effect between nanowires and orientated martensite NiTi shape memory alloy, we developed an in-situ Nb nanowires -orientated martensitic NiTi matrix composite showing an ultra-large linear elastic strain of 4% and an ultrahigh yield strength of 1.8 GPa. This material also has a high mechanical energy storage efficiency of 96% and a high energy storage density of 36 J/cm(3) that is almost one order of larger than that of spring steel. It is demonstrated that the synergistic effect allows the exceptional mechanical properties of nanowires to be harvested at macro scale and the mechanical properties of matrix to be greatly improved, resulting in these superior properties. This study provides new avenues for developing advanced composites with superior properties by using effective synergistic effect between components.

No MeSH data available.


Related in: MedlinePlus

Mechanical properties of in-situ Nb nanowires - oriented martensitic NiTi matrix composite wire.(a), Comparison of tensile stress-strain curves of the composite wire (red curve) and a commercial superelastic NiTi wire (yellow curve). The black dotted line is a standard straight line. (b), Repeated cyclic tensile stress-strain curves of the composite wire. Inset is the enlarged view of the tensile cyclic curve.
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f2: Mechanical properties of in-situ Nb nanowires - oriented martensitic NiTi matrix composite wire.(a), Comparison of tensile stress-strain curves of the composite wire (red curve) and a commercial superelastic NiTi wire (yellow curve). The black dotted line is a standard straight line. (b), Repeated cyclic tensile stress-strain curves of the composite wire. Inset is the enlarged view of the tensile cyclic curve.

Mentions: Figure 2a shows the tensile stress-strain curve of the composite wire. For comparison, the tensile stress-strain curve of a commercial superelastic NiTi wire (Ni-49.4 at.% Ti) is also presented in Figure 2a. It is evident that the composite wire exhibits an ultra-large linear elastic strain of 4% and high yield strength of 1.8 GPa. The linear elastic strain limits about one order of magnitude higher than that of conventional bulk metallic materials. Figure 2b shows the cyclic tensile stress-strain curves of the composite wire. It is observed that the tensile loading and unloading curves are nearly fully over lapped and that the composite wire has an excellent cyclic stability. Moreover, comparisons of the tensile cyclic curves of our composite and the previous reported bulk metallic materials with large linear elasticity78910111223. It is apparent that the hysteresis of our composite is much smaller than those of reported metallic materials.


Achieving large linear elasticity and high strength in bulk nanocompsite via synergistic effect.

Hao S, Cui L, Guo F, Liu Y, Shi X, Jiang D, Brown DE, Ren Y - Sci Rep (2015)

Mechanical properties of in-situ Nb nanowires - oriented martensitic NiTi matrix composite wire.(a), Comparison of tensile stress-strain curves of the composite wire (red curve) and a commercial superelastic NiTi wire (yellow curve). The black dotted line is a standard straight line. (b), Repeated cyclic tensile stress-strain curves of the composite wire. Inset is the enlarged view of the tensile cyclic curve.
© Copyright Policy - open-access
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4352871&req=5

f2: Mechanical properties of in-situ Nb nanowires - oriented martensitic NiTi matrix composite wire.(a), Comparison of tensile stress-strain curves of the composite wire (red curve) and a commercial superelastic NiTi wire (yellow curve). The black dotted line is a standard straight line. (b), Repeated cyclic tensile stress-strain curves of the composite wire. Inset is the enlarged view of the tensile cyclic curve.
Mentions: Figure 2a shows the tensile stress-strain curve of the composite wire. For comparison, the tensile stress-strain curve of a commercial superelastic NiTi wire (Ni-49.4 at.% Ti) is also presented in Figure 2a. It is evident that the composite wire exhibits an ultra-large linear elastic strain of 4% and high yield strength of 1.8 GPa. The linear elastic strain limits about one order of magnitude higher than that of conventional bulk metallic materials. Figure 2b shows the cyclic tensile stress-strain curves of the composite wire. It is observed that the tensile loading and unloading curves are nearly fully over lapped and that the composite wire has an excellent cyclic stability. Moreover, comparisons of the tensile cyclic curves of our composite and the previous reported bulk metallic materials with large linear elasticity78910111223. It is apparent that the hysteresis of our composite is much smaller than those of reported metallic materials.

Bottom Line: Developing bulk metallic materials showing large linear elasticity and high strength has proven to be difficult.It is demonstrated that the synergistic effect allows the exceptional mechanical properties of nanowires to be harvested at macro scale and the mechanical properties of matrix to be greatly improved, resulting in these superior properties.This study provides new avenues for developing advanced composites with superior properties by using effective synergistic effect between components.

View Article: PubMed Central - PubMed

Affiliation: State Key Laboratory of Heavy Oil Processing, China University of Petroleum, Beijing 102249, China.

ABSTRACT
Elastic strain in bulk metallic materials is usually limited to only a fraction of 1%. Developing bulk metallic materials showing large linear elasticity and high strength has proven to be difficult. Here, based on the synergistic effect between nanowires and orientated martensite NiTi shape memory alloy, we developed an in-situ Nb nanowires -orientated martensitic NiTi matrix composite showing an ultra-large linear elastic strain of 4% and an ultrahigh yield strength of 1.8 GPa. This material also has a high mechanical energy storage efficiency of 96% and a high energy storage density of 36 J/cm(3) that is almost one order of larger than that of spring steel. It is demonstrated that the synergistic effect allows the exceptional mechanical properties of nanowires to be harvested at macro scale and the mechanical properties of matrix to be greatly improved, resulting in these superior properties. This study provides new avenues for developing advanced composites with superior properties by using effective synergistic effect between components.

No MeSH data available.


Related in: MedlinePlus