Kaiyuan Yu

ORCID: 0000-0002-5442-2992
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About
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Research Areas
  • Microstructure and mechanical properties
  • Shape Memory Alloy Transformations
  • Fusion materials and technologies
  • Ion-surface interactions and analysis
  • Metal and Thin Film Mechanics
  • High Entropy Alloys Studies
  • Metallic Glasses and Amorphous Alloys
  • Nuclear materials and radiation effects
  • Microstructure and Mechanical Properties of Steels
  • Titanium Alloys Microstructure and Properties
  • Nuclear Materials and Properties
  • Copper Interconnects and Reliability
  • Advanced materials and composites
  • Aluminum Alloys Composites Properties
  • Magnetic and transport properties of perovskites and related materials
  • Intermetallics and Advanced Alloy Properties
  • Gut microbiota and health
  • Probiotics and Fermented Foods
  • Ferroelectric and Piezoelectric Materials
  • Electric Power System Optimization
  • Metal Alloys Wear and Properties
  • High-Velocity Impact and Material Behavior
  • Transition Metal Oxide Nanomaterials
  • Anodic Oxide Films and Nanostructures
  • Material Properties and Applications

China University of Petroleum, Beijing
2016-2025

Hunan Agricultural University
2024

Tianjin Medical University
2019-2024

China Southern Power Grid (China)
2023

North China Electric Power University
2021-2022

State Key Laboratory of Heavy Oil
2016

Texas A&M University
2010-2015

Beihang University
2011

Abstract Material performance in extreme radiation environments is central to the design of future nuclear reactors. Radiation induces significant damage form dislocation loops and voids irradiated materials, continuous often leads void growth subsequent swelling metals with low stacking fault energy. Here we show that by using situ heavy ion irradiation a transmission electron microscope, pre-introduced nanovoids nanotwinned Cu efficiently absorb radiation-induced defects accompanied...

10.1038/ncomms8036 article EN cc-by Nature Communications 2015-04-24

Aluminium typically deforms via full dislocations due to its high stacking fault energy. Twinning in aluminium, although difficult, may occur at low temperature and strain rate. However, the 9R phase rarely occurs aluminium simply because of giant Here, by using a laser-induced projectile impact testing technique, we discover deformation-induced with tens nm width ultrafine-grained an average grain size 140 nm, as confirmed extensive post-impact microscopy analyses. The stability is related...

10.1038/s41467-017-01729-4 article EN cc-by Nature Communications 2017-11-15

High energy particles introduce severe radiation damage in metallic materials, such as Ag. Here we report on the study twin boundary (TB) affected zone irradiated nanotwinned Ag wherein time accumulative defect density and diffusivity are substantially different from those interior. In situ studies also reveal surprising resilience self-healing of TBs response to radiation. This provides further support for design radiation-tolerant materials.

10.1021/nl504677z article EN Nano Letters 2015-03-13

Commensal intestinal bacteria play key roles in regulating host immune tolerance; however, bacterial strains and related metabolites directly involved this regulation are largely unknown. Here, using a mouse model of dextran sulfate sodium (DSS)-induced colitis combined with different antibiotic treatment, Enterobacter ludwigii, abundant microbiota mice treated metronidazole, is screened out to have prophylactic therapeutic effects on DSS-induced or without the presence complex bacteria. E....

10.1016/j.celrep.2022.111308 article EN cc-by-nc-nd Cell Reports 2022-08-01

NiTi shape memory alloys produced via additive manufacturing are suffering low tensile strength, total elongation, and unstable superelasticity, thus failing to meet the requirements of practical applications. Here, we report an strategy substantially synergistically improve ductility, superelasticity by laser powder bed fusion through establishing high-density Ni-rich local chemical inhomogeneity (LCI) entities within B2 matrix. Compared with other documented microstructures such as...

10.1038/s41467-025-56775-0 article EN cc-by-nc-nd Nature Communications 2025-02-24

Monolithic Ag and Ni films Ag/Ni multilayers with individual layer thickness of 5 50 nm were subjected to in situ Kr ion irradiation at room temperature 1 displacement-per-atom (a fluence 2 × 1014 ions/cm2). has high density small loops (4 diameter), whereas fewer but much greater (exceeding 20 nm). In comparison, dislocation loops, ∼4 diameter, the major defects irradiated film, while barely observed film. At 0.2 dpa (0.4 ions/cm), defect both monolithic saturated 1.6 1023/m3, compared 0.8...

10.1080/14786435.2013.815378 article EN The Philosophical Magazine A Journal of Theoretical Experimental and Applied Physics 2013-07-15

Uropathogenic Escherichia coli (UPEC) is the leading cause of urinary tract infections (UTIs), inducing acute pyelonephritis and may result in permanent renal scarring failure. Alpha-hemolysin (HlyA), a key UPEC toxin, causes serious tissue damage; however, mechanism through which HlyA induces kidney injury remains unclear. In present study, granulocyte-macrophage colony-stimulating factor (GM-CSF) secreted by epithelial cells was upregulated vitro vivo, induced M1 macrophage accumulation...

10.1038/s41385-019-0225-6 article EN cc-by Mucosal Immunology 2019-11-12
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