Results 41 to 50 of about 16,888 (264)

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

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

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

The effects of different factors on obstacle strength of irradiation defects: An atomistic study

Nuclear Engineering and Technology
In this work we study the effects of different factors of dislocation loop on its obstacle strength when interacting with an edge dislocation. At first, the interaction model for dislocation and dislocation loop is established and the full and partial ...
Pan-dong Lin, Jun-feng Nie, Yu-peng Lu, Gui-yong Xiao, Guo-chao Gu, Wen-dong Cui, Lei He   +6 more
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

Nanoindentation investigation on the dislocation generation at incipient plasticity in a high carbon-added high-entropy alloy

Journal of Materials Research and Technology, 2023
High-content interstitial carbon addition has been proven to regulate the dislocation behavior in high-entropy alloys (HEAs) during deformation, thereby overcoming the strength-ductility trade-off, but its exact mechanism is still unclear.
Conghui Hu, Jianlei Zhang, Yunhu Zhang, Gang Chen, Changjiang Song, Qijie Zhai   +5 more
doaj   +1 more source

Gut microbiome and aging—A dynamic interplay of microbes, metabolites, and the immune system

FEBS Letters, EarlyView.
Age‐dependent shifts in microbial communities engender shifts in microbial metabolite profiles. These in turn drive shifts in barrier surface permeability of the gut and brain and induce immune activation. When paired with preexisting age‐related chronic inflammation this increases the risk of neuroinflammation and neurodegenerative diseases.
Aaron Mehl, Eran Blacher
wiley   +1 more source

Reconstructing enzyme evolution by protein engineering

FEBS Letters, EarlyView.
Natural enzyme evolution can be retraced by protein engineering methods such as directed evolution, rational design, and ancestral sequence reconstruction. These approaches reveal how enzymes emerged from ligand‐binding scaffolds, developed varying substrate preferences, formed oligomeric complexes, adapted to environmental changes, and evolved novel ...
Lukas Drexler, Markus R. Busch, Reinhard Sterner   +2 more
wiley   +1 more source

Dislocation Burgers vector and the Peach–Koehler force: a review

Journal of Materials Research and Technology, 2019
Different definitions of the Burgers vector and the corresponding construction of the Burgers circuit for dislocation loops and straight dislocations, created by the displacement discontinuity imposed across different surface cuts are reviewed.
Vlado A. Lubarda
doaj   +1 more source

Structure‐forward targeting of claudins with synthetic binders

FEBS Letters, EarlyView.
Claudins form the paracellular barriers between epithelial and endothelial tissues at tight junctions and are targets for molecular binders with the goal of modulating barrier permeability. Claudin‐binding molecules are relevant in drug delivery or in altering claudin interactions with disease‐causing proteins.
Alex J. Vecchio
wiley   +1 more source