A5066341739- Microstructure and Mechanical Properties of Steels
- Metallurgical Processes and Thermodynamics
- Metal Alloys Wear and Properties
- Intermetallics and Advanced Alloy Properties
- Metallurgy and Material Forming
- Hydrogen embrittlement and corrosion behaviors in metals
- Corrosion Behavior and Inhibition
- Aluminum Alloy Microstructure Properties
- MXene and MAX Phase Materials
- Microstructure and mechanical properties
- High Temperature Alloys and Creep
- Semiconductor materials and interfaces
- Aluminum Alloys Composites Properties
- Advanced materials and composites
- Cellular Mechanics and Interactions
- Magnetic Properties and Applications
- Fire effects on concrete materials
- ZnO doping and properties
- Gas Sensing Nanomaterials and Sensors
- High-Temperature Coating Behaviors
- Microtubule and mitosis dynamics
- Material Properties and Applications
- Ga2O3 and related materials
- Metal and Thin Film Mechanics
- Solidification and crystal growth phenomena
Shanghai University
2020-2025
University of Science and Technology Beijing
2007-2024
University of Chinese Academy of Sciences
2023-2024
Beihang University
2024
Hangzhou First People's Hospital
2023
Beijing Institute of Technology
2023
Peking University
2004-2022
Peking University Third Hospital
2022
Solid (United States)
2022
Yangtze Normal University
2020
The ductile-to-brittle transition (DBT) is an important characteristic that restricts the use of body-centered cubic metals as structural materials at low temperatures. This study shows a design heterogenous lamellar microstructure (HLM), which implemented in low-density steel to promote occurrence delamination parallel direction main crack propagation, and result toughening effect. When Charpy impact test temperature was reduced from room −196°C, absorbed energy displayed linear decline....
This article studied the effect of Mg content on TiN inclusions in interstitial-free (IF) steel through laboratory experiments and thermodynamic calculations. In absence steel, precipitate with Al 2 O 3 large size small quantity as nucleation core, leading to formation numerous clustered steel. The addition provides abundant fine dispersed MgAl 4 MgO heterogeneous cores, promoting inclusions. can effectively reduce average improve clustering phenomenon IF actual industrial production, it is...
In the domain of fire-resistant steels, characteristics precipitates significantly influence material properties. This study developed a novel heat treatment protocol to concurrently achieve both interphase precipitation and random precipitation. Samples were subjected isothermal treatments at various temperatures durations, while techniques such as scanning electron microscopy (SEM) transmission (TEM) employed thoroughly analyze coarsening behavior two types precipitate reveal their thermal...
The hot-working behavior of high-Mn austenitic steel for liquefied natural gas carriers at the deformation temperature in range 1073–1273 K and strain rate 0.01–10 s−1 was studied on a Gleeble-3800 thermomechanical simulator using compression test. Electron backscatter diffraction used to study microstructure after deformation. Under each condition, peak stress appears stress-strain curve, which conforms traditional dynamic recrystallization flow curves. A hyperbolic sine-law-type...
Tellurium is used for optimizing sulfide inclusion morphology in the iron and steel industry. In this study, effects of tellurium on inclusion, microstructure, mechanical properties, fatigue performance, machinability, corrosion resistance industrial 38MnVS bars were investigated. The results show that weight ratio Te/S tellurium-treated was 0.043. Further, mainly form an MnS substitutional atom. inclusions refined strengthened via modification, promoting ferrite transformation refinement....
The static recrystallization behavior of a low-density δ-ferritic steel containing 4 wt% Al was investigated by means hot compression tests. fractional softening obtained from the interrupted tests used as measure combined effect recovery and recrystallization. single-pass followed holding were performed to reveal degree experimental results indicated that onset occurred at 0.6, which lower than other ferritic steels. Moreover, nucleation dominated strain induced grain boundary migration....
The morphology of MnS inclusion is one the key elements influencing machinability steel. Herein, it shown in thermodynamic analysis results that interaction coefficient causes a 1.2% deviation for precipitation low‐sulfur‐content steel (S1), while 14% high‐sulfur (S2), and content C Si main element causing deviation. microstructure medium‐carbon mainly pearlite ferrite. increase manganese sulfur leads to decrease ferrite content. Almost all inclusions S1 are polyhedral, S2 contains...
Herein, the nucleation, growth, aggregation, sintering, and densification of sulfide in 1215MS free‐cutting steel billet with a total oxygen concentration 70 ppm are investigated. A portion dissolves to form oxysulfide, Mn(S,O), which can be single‐particle spherelike (SPS), double‐particle rodlike (DPR), multi‐particle (MPR), SiO 2 precipitate at outer edge SPS connection DPR MPR inclusion particles Mn(S,O)–SiO inclusion, is formed by change liquid that undergoes monotectic reaction oxides...
Under the industrial process conditions, trace tellurium (13 ppm and 22 ppm) was added to medium-carbon low-sulfur steel optimize morphology of MnS inclusion thereby enhance machinability steel. Voller-Beckermann microsegregation model used calculate precipitation thermodynamics growth kinetics inclusion. The observed is mainly polygonal (type III), microstructures are bulk-, acicular-ferrite, pearlite, inclusions present in bulk-ferrite. calculation results relative plasticity show that 13...
This study investigates the in-situ evolution of morphology heated microstructures and sulfides, to detect machinability Bi-bearing high S, low C free-cutting steels. The results show that Bi particles soften, melt, vaporize during heating process. Its temperature varies slower than steel, causes extensive local expansion austenite grains. Heat absorbed by small sulfides leads their volume formation larger fusion, whereas heat large enlargement in dependent spherical or ellipsoidal shapes....
We report the effect of alkyl side chain branching on melt-recrystallization nanoconfined polypeptoid films using poly(N-octyl glycine) (PNOG) and poly(N-2-ethyl-1-hexyl (PNEHG) as model systems. Upon cooling from isotropic melt, confined PNOG molecules recrystallize into a near-perfect orthorhombic crystal structure with board-like stacked face-to-face in substrate-parallel direction, resulting long-range ordered wormlike lamellae that occupy entire film. By contrast, rod-like PNEHG bearing...