Results 31 to 40 of about 59,310 (292)

Ion Irradiation Defects and Hardening in FeCrAl Alloy

Metals, 2022
The self-ion irradiation experiments of FeCrAl and Y−FeCrAl alloys are carried out at 330 °C to 1–10 displacements per atom (dpa). The formation of dislocation loops in these alloys is investigated by transmission electron microscopy (TEM) and nano ...
Fang Li, Yunxiang Long, Daxi Guo, Liping Guo, Wenbin Lin, Yiheng Chen, Lei Li, Qisen Ren, Yehong Liao   +8 more
doaj   +1 more source

Toy nanoindentation model and incipient plasticity

, 2009
A toy model of two dimensional nanoindentation in finite crystals is proposed. The crystal is described by periodized discrete elasticity whereas the indenter is a rigid strain field of triangular shape representing a hard knife-like indenter.
A. Carpio, Amit, Asenjo, Bulatov, Carpio, Carpio, Carpio, Carpio, Cui, de la Fuente, Gerde, Greer, Hirth, Hull, I. Plans, Iooss, Kelchner, Kessler, L.L. Bonilla, Landau, Landau, Lorenz, Marder, Navarro, Pla, Plans, Rubinstein, Schall, Shan, Slepyan, Zhen, Zhu   +31 more
core   +1 more source

The Discrete Dislocation Dynamics of Multiple Dislocation Loops

Archive for Rational Mechanics and Analysis
57 pages, 3 figures.
Patrizi, Stefania, Vaughan, Mary
openaire   +3 more sources

Movement of Dislocation Loops in Lithium Fluoride

Journal of Applied Physics, 1958
Very refined experiments on the movement of single dislocation loops in lithium fiuoride crystals, as revealed by etch pits, have been reported. In this note a somewhat more detailed interpretation is given for one particularly signiflcant experiment. (W.D.M.)
Amelinckx, Severin, Dekeyser, Willy
openaire   +2 more sources

Annihilation and sources in continuum dislocation dynamics

Materials Theory, 2018
Continuum dislocation dynamics (CDD) aims at representing the evolution of systems of curved and connected dislocation lines in terms of density-like field variables. Here we discuss how the processes of dislocation multiplication and annihilation can be
Mehran Monavari, Michael Zaiser
doaj   +1 more source

Direct Observation of Cu Clusters and Dislocation Loops by Cs-Corrected STEM in Fe-0.6wt%Cu Alloy Irradiated in BR2

Metals, 2022
The neutron irradiation of Fe-based fusion and fission reactor materials leads to an increase in ductile-to-brittle transition temperature with a decrease in upper shelf energy. It is well known that Cu content has a strong influence on the embrittlement
Hideo Watanabe, Tomonari Tanaka, Takuya Turu, Yasuhiro Kamada   +3 more
doaj   +1 more source

Phase Field Crystal Modeling as a Unified Atomistic Approach to Defect Dynamics

, 2014
Material properties controlled by evolving defect structures, such as mechanical response, often involve processes spanning many length and time scales which cannot be modeled using a single approach.
Berry, Joel, Provatas, Nikolas, Rottler, Jörg, Sinclair, Chad W.   +3 more
core   +1 more source

Investigation of Interactions between Dislocation and Dislocation Loops in Fe33Ni33Cr Alloy by Molecular Dynamics Simulation

Yuanzineng kexue jishu
The FeNiCr alloys hold application potential in advanced reactors, however, irradiation hardening severely impacts their safety during service. To further enhance the irradiation hardening theory of the FeNiCr alloys, the interaction mechanism between 1/
LONG Kaihong, WANG Dongjie, HUANG Chutian, JIA Lixia, HE Xinfu, DOU Yankun
doaj   +1 more source

Microstructure Characterization and Hardening Evaluation of Ferrite/Martensitic Steels Induced by He²⁺ Irradiation

Crystals, 2023
Two ferrite/martensitic (F/M) steels with different Si concentrations (0 and 0.4 wt.%) were irradiated by 250 keV He2+ ions with different fluences of 2 × 1016 ions/cm2 and 1 × 1017 ions/cm2.
Guangjie Zhang, Junfeng Yang, Zhuoming Xie, Linchao Zhang, Rui Liu, Meng Sun, Gang Li, Hui Wang, Yi Hu, Xuebang Wu, Qianfeng Fang, Changsong Liu, Xianping Wang   +12 more
doaj   +1 more source

Chiral Lyotropic Liquid Crystals: TGB Phases and Helicoidal Structures [PDF]

, 1996
The molecules in lyotropic membranes are typically aligned with the surface normal. When these molecules are chiral, there is a tendency for the molecular direction to twist.
Kamien, Randall D., Lubensky, T. C.
core   +5 more sources