The discontinuous effect of pressure on twin boundary strength in MgO
Sign Up to like & getrecommendations! Published in 2020 at "Physics and Chemistry of Minerals"
DOI: 10.1007/s00269-019-01079-1
Abstract: MgO makes up about 20% of the Earth’s lower mantle; hence, its rheological behaviour is important for the dynamics and evolution of the Earth. Here, we investigate the strength of twin boundaries from 0 to… read more here.
Keywords: mgo; strength; discontinuous effect; twin boundary ... See more keywords
Crack propagation mechanism of γ-TiAl alloy with pre-existing twin boundary
Sign Up to like & getrecommendations! Published in 2019 at "Science China Technological Sciences"
DOI: 10.1007/s11431-017-9307-5
Abstract: The deformation and failure mechanisms of γ-TiAl alloy with pre-existing crack and twin boundary are investigated by using molecular dynamics simulation. The effects of the crack position on the deformation and failure mechanisms of γ-TiAl… read more here.
Keywords: mechanism; crack; twin boundary; crack propagation ... See more keywords
Dislocation slip transmission through a coherent Σ3{111} copper twin boundary: Strain rate sensitivity, activation volume and strength distribution function
Sign Up to like & getrecommendations! Published in 2018 at "Acta Materialia"
DOI: 10.1016/j.actamat.2018.09.045
Abstract: Abstract We present the first measurement of the strain rate sensitivity of the ideal dislocation slip transmission through a coherent Σ3{111} copper twin boundary. For this purpose we have deformed 129 geometrically identical samples at… read more here.
Keywords: slip; transmission; rate sensitivity; strain rate ... See more keywords
Temperature-dependent mechanisms of dislocation–twin boundary interactions in Ni-based equiatomic alloys
Sign Up to like & getrecommendations! Published in 2021 at "Acta Materialia"
DOI: 10.1016/j.actamat.2021.116886
Abstract: Abstract The high entropy alloy FeNiCoCrMn and its subsets have exhibited an unusual combination of strength and ductility dependance on temperature, showing a significant increase in ductility as temperature decreases. This phenomenon is intriguing, and… read more here.
Keywords: ductility; based equiatomic; equiatomic alloys; dislocation ... See more keywords
Effects of high entropy and twin boundary on the nanoindentation of CoCrNiFeMn high-entropy alloy: A molecular dynamics study
Sign Up to like & getrecommendations! Published in 2021 at "Computational Materials Science"
DOI: 10.1016/j.commatsci.2021.110495
Abstract: Abstract To study the effects of twin boundary and high-entropy on elastic–plastic behavior of high-entropy alloys (HEAs), molecular dynamics (MD) was employed to simulate the nanoindentation on single-crystal CoCrNiFeMn HEA (sc-HEA), twinned CoCrNiFeMn HEA (tw-HEA)… read more here.
Keywords: nanoindentation; twin boundary; molecular dynamics; cocrnifemn ... See more keywords
Effect of twin boundary-dislocation and twin boundary-solute atom interaction on detwinning of Mg-2Gd-2Y-0.3Zr alloy
Sign Up to like & getrecommendations! Published in 2019 at "Journal of Alloys and Compounds"
DOI: 10.1016/j.jallcom.2018.08.171
Abstract: Abstract In the present work, the effect of twin boundary-dislocation and twin boundary-solute atom interaction on detwinning of Mg-2Gd-2Y-0.3Zr alloy has been investigated by annealing treatment and change of loading path. The results show that… read more here.
Keywords: dislocation twin; twin; twin boundary; boundary dislocation ... See more keywords
Molecular dynamics simulation on the deformation mechanism of monocrystalline and nano-twinned TiN under nanoindentation
Sign Up to like & getrecommendations! Published in 2020 at "Materials Chemistry and Physics"
DOI: 10.1016/j.matchemphys.2020.123263
Abstract: Abstract In this research work, MD simulations are performed to investigate the nanoindentation deformation mechanisms of monocrystalline and nano-twinned TiN with various twin thicknesses. It is found that the nanoindentation plastic deformation of monocrystalline TiN… read more here.
Keywords: twinned tin; deformation; twin boundary; nanoindentation ... See more keywords
Effects of the evolution of electronic properties on twin-boundary segregation energies of zirconium from first-principles calculations
Sign Up to like & getrecommendations! Published in 2017 at "Materials Letters"
DOI: 10.1016/j.matlet.2017.05.093
Abstract: Abstract The twin-boundary segregation energies (ETBS) of {10–12} tension twins and {10–11} compression twins for Zr-X (X = Sn, Fe, Cr, Nb) binary alloys are computed using first-principles calculations. Additionally, the effects of atomic radius and electronic… read more here.
Keywords: boundary segregation; electronic properties; segregation energies; twin boundary ... See more keywords
Stress accommodation by α to α″ transformation at the{101¯1}twin boundary in a cold-rolled Ti-5at.% Al alloy
Sign Up to like & getrecommendations! Published in 2019 at "Materialia"
DOI: 10.1016/j.mtla.2019.100469
Abstract: Abstract In this work, the stress induced hexagonal close packed structure (α) to base-centered orthorhombic structure (α″) phase transformation were observed at the { 10 1 ¯ 1 } twin boundaries in a cold-rolled Ti-5at.%Al… read more here.
Keywords: 5at alloy; transformation; rolled 5at; stress ... See more keywords
Simultaneous optimization of electrical and thermal transport properties of Bi0.5Sb1.5Te3 thermoelectric alloy by twin boundary engineering
Sign Up to like & getrecommendations! Published in 2017 at "Nano Energy"
DOI: 10.1016/j.nanoen.2017.05.031
Abstract: Abstract The strong interdependence between the Seebeck coefficient, the electrical and thermal conductivity makes it difficult to obtain a high thermoelectric figure of merit, ZT . It is of critical significance to design a novel… read more here.
Keywords: electrical thermal; thermal transport; twin boundary; simultaneous optimization ... See more keywords
Penta-Twin Destruction by Coordinated Twin Boundary Deformation.
Sign Up to like & getrecommendations! Published in 2021 at "Nano letters"
DOI: 10.1021/acs.nanolett.1c02970
Abstract: Penta-twinned nanomaterials often exhibit unique mechanical properties. However, the intrinsic deformation behavior of penta-twins remains largely unclear, especially under the condition of high shear stress. In this study, we show that the deformation of penta-twins… read more here.
Keywords: boundary deformation; penta twin; coordinated twin; penta ... See more keywords