Results 81 to 90 of about 59,310 (292)

In-situ TEM Study of Dislocation Loop Evolution in Tungsten under Dual-ion Beam Irradiation

Yuanzineng kexue jishu
Fusion reactors are regarded as the ultimate source of energy for addressing future power problems. However, prior to the building of fusion power plants, a number of scientific obstacles including significant degradation of plasma-facing material (PFM).
MA Pengfei1, LIU Yan2, CAO Liuxuan2, ZHANG Yapei1, LI Xiurui1, TIAN Wenxi1, QIU Suizheng1, SU Guanghui1
doaj   +1 more source

Interstitials, Vacancies and Dislocations in Flux-Line Lattices: A Theory of Vortex Crystals, Supersolids and Liquids

, 1999
We study a three dimensional Abrikosov vortex lattice in the presence of an equilibrium concentration of vacancy, interstitial and dislocation loops. Vacancies and interstitials renormalize the long-wavelength bulk and tilt elastic moduli.
A. Larkin, A. Zippelius, A.I. Larkin, A.P. Young, B.I. Halperin, C.J. Olson, C.J. Olson, D. Huse, D.R. Nelson, D.R. Nelson, D.R. Nelson, D.R. Nelson, D.R. Nelson, D.R. Nelson, D.R. Nelson, D.S. Fisher, D.S. Fisher, D.S. Fisher, D.S. Fisher, D.T. Fuchs, E. Frey, E. Frey, E. Zeldov, E.H. Brandt, E.H. Brandt, E.H. Brandt, E.H. Brandt, E.L. Pollock, E.M. Forgan, E.Y. Andrei, F.R.N. Nabarro, G. Blatter, H.M. Carruzzo, J.M. Kosterlitz, K. Moon, L. Balents, L. Balents, L. Radzihovsky, L. Radzihovsky, L. Radzihovsky, L.I. Glazman, Leo Radzihovsky, M. Cristina Marchetti, M.C. Marchetti, M.C. Marchetti, M.J.P. Gingras, M.P.A. Fisher, M.P.A. Fisher, P.C. Martin, P.L. Gammel, R.H. Koch, S.A. Ktitorov, T. Chen, T. Giamarchi   +53 more
core   +1 more source

Fatigue Crack Initiation and Growth in Nanocrystalline Ni at Multiple Length‐Scales

Advanced Engineering Materials, EarlyView.
Overview of miniaturized in situ SEM fatigue setup and resultant fatigue crack growth data for nanocrystalline Ni. The presented study focuses on the analysis of fatigue crack growth rate (FCGR) in focused ion beam‐notched microcantilevers prepared from nanocrystalline (NC) Ni as a model material.
Igor Moravcik, Alexander Jelinek, Markus Alfreider, Jutta Luksch, Anton Hohenwarter, Florian Schaefer, Christian Motz, Daniel Kiener   +7 more
wiley   +1 more source

Phason Sinks of Radiation Defects in Quasicrystals

East European Journal of Physics, 2013
Phason sinks of radiation defects in quasicrystals are considered as partial point defects. The kinetics of point defect absorption by single phasons is studied. A model of the dislocation loop with the phason fault under irradiation is developed.
Galina Lazareva, Aleksandr Bakai
doaj  

Atomistically enabled nonsingular anisotropic elastic representation of near-core dislocation stress fields in $\alpha$-iron

, 2015
The stress fields of dislocations predicted by classical elasticity are known to be unrealistically large approaching the dislocation core, due to the singular nature of the theory.
Elsaesser, Christian, Gumbsch, Peter, Lazar, Markus, Mrovec, Matous, Po, Giacomo, Seif, Dariush   +5 more
core   +1 more source

Creep Properties and Deformation Mechanism of Additively Manufactured NiAl‐CrMo Composites

Advanced Engineering Materials, EarlyView.
Additively manufactured NiAl‐CrMo composites contain numerous interfaces and cell boundaries that control their creep response. At 700°C under high applied stress, creep is dominated by dislocation‐controlled power‐law mechanisms. At 800°C–900°C and lower stresses, creep is primarily diffusion‐controlled along cell boundaries.
Jan Vollhüter, Andreas Bezold, Johan Westraadt, Katharina Fiegl, Subham Chattoraj, Benjamin Wahlmann, Carolin Körner, Michael Mills, Mathias Göken, Steffen Neumeier   +9 more
wiley   +1 more source

Plastic damage evolution in structural steel and its non-destructive evaluation

Journal of Materials Research and Technology, 2020
This paper reports the plastic damage evolution in low carbon structural steel and its NDT evaluation. The SEM observations reveal that the voids initiation, growth, coalescence, micro-crack propagation, and macro-crack formation are the main failure ...
Xiao Wang, Jian-Guo Chen, Guo-feng Su, Hua-Ying Li, Chuang Wang   +4 more
doaj   +1 more source

Enhanced Strength and Corrosion Resistance of Ti‐13Nb‐12Ta‐10Zr‐4Sn Alloy by Aging Treatment

Advanced Engineering Materials, EarlyView.
This work systematically investigates the effect of aging treatment on mechanical properties and corrosion behavior of vacuum arc‐melted Ti‐13Nb‐12Ta‐10Zr‐4Sn alloy. Owing to the increased α″ martensite, strength and corrosion resistance were significantly enhanced by aging treatment.
Yuhua Li, Rong Zhao, Qian Zhang, Haojie Wang, Yujing Liu, Lai‐Chang Zhang   +5 more
wiley   +1 more source

Dislocation loops in overheated free-standing smectic films

, 2001
Static and dynamic phenomena in overheated free-standing smectic-A films are studied using a generalization of de Gennes' theory for a confined presmectic liquid.
A. J. Bray, A. N. Shalaginov, A. N. Shalaginov, A. N. Shalaginov, B. V. Toshev, C. Bahr, D. E. Sullivan, E. A. L. Mol, E. E. Gorodetskii, E. I. Demikhov, F. Picano, F. Picano, J. C. Geminard, L. M. Pismen, L. V. Mirantsev, M. Buttiker, P. Cluzeau, P. G. de Gennes, P. G. de Gennes and, P. M. Johnson, P. Pieranski, S. Chan, S. Pankratz, S. Pankratz, S. Pankratz, T. Stoebe, V. Popa-Nita, W. van Saarloos, Y. Martinez, Y. Martinez-Raton, Y. Martinez-Raton   +30 more
core   +1 more source

In Situ Micromechanical Study of Bimodal γ′–γ″ Precipitate Assemblies in Ni–Cr–Al–Nb Superalloy

Advanced Engineering Materials, EarlyView.
A Ni–Cr–Al–Nb superalloy with a bimodal γ′–γ″ precipitate distribution is developed. Composite precipitate assemblies form through heterogeneous nucleation, effectively impeding dislocation motion. Micropillar compression reveals high strength at room and elevated temperatures, governed by precipitate shearing, with coupled faulting mechanisms ...
Ujjval Bansal, Tae‐Hyeok Kang, Pyuck‐Pa Choi, Subin Lee, Christoph Kirchlechner   +4 more
wiley   +1 more source