Negative stiffness of the FeAl intermetallic nanofilm

Bukreeva, K. A.; Babicheva, Rita I.; Zhou, Kun; Mulyukov, R. R.

doi:10.1134/s1063783413090072

Cited by 15 publications

(11 citation statements)

References 39 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…It should be noted that, even in the current state of the art in the development of high-performance computers, an ab-initio simulation of this system remains impossible. On the other hand, the potentials proposed by Cleri and Rosato [12] have already worked well in cluster studies [13][14][15][16][17][18][19].…”

Section: Molecular Dynamics Simulationsmentioning

confidence: 89%

Features of deformation and breaking for Ni nanowire

Старостенков¹,

Aish²

2014

LoM

View full text Add to dashboard Cite

Molecular dynamics (MD) simulations have been carried out on pure Nickel (Ni) crystal with face-centered cubic (FCC) lattice upon application of uniaxial tension at nanolevel with a speed of 20 m / s. The deformation corresponds to the direction <001>. To the calculated block of crystal free boundary conditions are applied in the directions <100>, <010>. A manybody interatomic potential for Ni within the second-moment approximation of the tight-binding model (the Cleri and Rosato potentials) was employed to carry out three dimensional MD simulations. A computer experiment is performed at a temperature corresponding to 10K, 300K and 1000K. MD simulation used to investigate the effect of length of Ni nanowire on the nature of deformation and fracture. The feature of deformation energy can be divided into four regions: quasi-elastic, plastic, flow and failure. The nature of deformation, slipping, twinning and necking were studied. Stress decreased with increasing volume. The results showed that breaking position depended on the nanowire length.

show abstract

Section: Molecular Dynamics Simulationsmentioning

confidence: 89%

Features of deformation and breaking for Ni nanowire

Старостенков¹,

Aish²

2014

LoM

View full text Add to dashboard Cite

show abstract

“…1 for a temperature of 1000 K. For further conve nience, the coordinates are denoted here as σ s and ε s . The dependence σ s (ε s ) under a gradual increase in the load in the region 0-1 can be expressed as (6) where E 1 = 130 GPa, E 2 = 780 GPa for the present curve. The coordinates of the point 1 are ε s1 = 0.083 and σ s1 = 5.42 GPa.…”

Section: Eigenfrequencies Of Nanofilms Under Controlled Tensile Stressmentioning

confidence: 93%

“…Unique properties of nanofibers and nanofilms cause a change in their operational mechanical char acteristics with respect to classical bulk materials (these properties were studied, e.g., in [1][2][3][4][5][6][7][8]). In par ticular, the strength of nanomaterials, which is much higher than that of ordinary metals and alloys and approaches the theoretical strength, allows using a rel atively small thickness of film packet (bunch of fibers) under the conditions of tensile stresses.…”

Section: Introductionmentioning

confidence: 99%

Wave velocity and frequency spectrum of longitudinal oscillations of stretched intermetallic nanofilms

Ilgamov

2015

Phys. Solid State

View full text Add to dashboard Cite

The wave velocity and the spectrum of eigenfrequencies of longitudinal oscillations in FeAl and NiAl intermetallic alloy nanofilms have been determined based on the recent data on the tensile strained state of the films. These characteristics vary from the well known to ultralow values depending on the static tensile strain of the films. The frequencies vanish at a certain static strain and drastically increase with a further increase in the strain.

show abstract

“…The non-homogeneous deformation of NiAl and FeAl nanomaterials, in particularly, their nanofilms and nanowires, can be explained by the peculiarity of potential energy curves for these systems similar to that for the DNA chain [24,48,50]. If the potential energy E as a function of strain ε under uniform tension of a nanowire has a convex segment (Fig.2), the non-uniform deformation at which the system follows tangent 1-2 with the lower energy E(ε) than in the convex segment is more favorable.…”

Section: Non-homogeneous Elastic Deformation Of Nial and Fealmentioning

confidence: 99%

“…Thus, it has been shown recently in a number of works that the similar with DNA deformation behavior can be observed in NiAl and FeAl intermetallic nanomaterials [25,27,[48][49][50].The current paper reviews the works devoted to molecular dynamics (MD) study of elastic deformation behavior of NiAl and FeAl nanofilms and nanowires using the atomic / molecular massively parallel simulator (LAMMPS) program package [51].…”

Section: Introductionmentioning

confidence: 99%

Deformation behavior of perfect and imperfect nanomaterials made of intermetallic compounds with bcc lattice

Babicheva¹,

Старостенков²,

Zhou³

2014

LoM

Self Cite

View full text Add to dashboard Cite

The paper reviews the literature devoted to the stress-strain behavior of nanomaterials made of NiAl and FeAl intermetallics having B2 superstructure with body-centered cubic (bcc) lattice. Such nanomaterials demonstrate elastic deformation up to the point of their failure. In a concave region of a strain dependence of the potential energies P(ε), the materials demonstrate thermodynamic instability and the non-homogeneous elastic deformation which is accompanied by the appearance of domains of two strain levels. Stretching behavior of NiAl and FeAl nanomaterials depends on lattice defects and sample geometry. An introduction of lattice defects which result in an appearance of residual stresses in structures can lead to the nanomaterial strengthening.

show abstract

Negative stiffness of the FeAl intermetallic nanofilm

Cited by 15 publications

References 39 publications

Features of deformation and breaking for Ni nanowire

Features of deformation and breaking for Ni nanowire

Wave velocity and frequency spectrum of longitudinal oscillations of stretched intermetallic nanofilms

Deformation behavior of perfect and imperfect nanomaterials made of intermetallic compounds with bcc lattice

Contact Info

Product

Resources

About