A5075355866- Microstructure and Mechanical Properties of Steels
- Metal Alloys Wear and Properties
- Hydrogen embrittlement and corrosion behaviors in metals
- Surface Treatment and Residual Stress
- Metallurgy and Material Forming
- Fatigue and fracture mechanics
- Welding Techniques and Residual Stresses
- Magnetic Properties and Applications
- Tribology and Lubrication Engineering
- Mechanical Failure Analysis and Simulation
- Virtual Reality Applications and Impacts
- Advanced machining processes and optimization
- Augmented Reality Applications
- Visual Attention and Saliency Detection
- Metal Forming Simulation Techniques
- Metal and Thin Film Mechanics
- High Temperature Alloys and Creep
- Microstructure and mechanical properties
- Aluminum Alloys Composites Properties
Zhengzhou University
2021-2024
Zhejiang Sci-Tech University
2021
Shanghai Jiao Tong University
2015-2019
Carburizing heat treatment is widely used in the fabrication of gears to improve their fatigue performance. The effects carburizing process on material properties surface hardness, residual stresses, retained austenite case-hardened 18CrNiMo7-6 and consequential strength have not been studied detail. In this research, high-cycle performance uncarburized carburized gear steel were studied. addition, evolution processes microstructure stress specimens during test observed quasi-in situ....
Alternately timed quenching (ATQ) technology includes ATQ process and equipment. essentially executes multicycle quenching-partitioning-tempering (MQ-P-T) by alternative water -quenching air cooling. Engineering applications indicate that not only can replace oil or aqueous polymer solution quenching, but also reach even be superior to the mechanical properties of workpieces quenched solution. Since direct water-quenching usually causes cracking workpieces, polluting is still used in modern...
A Fe-0.20C-1.49Mn-1.52Si-0.58Cr-0.05Nb (wt%) steel was treated by a novel quenching-partitioning-tempering (Q-P-T) process and traditional quenching tempering (Q&T) for comparison, respectively. The researches of the mechanical properties forming limit diagrams reveal that Q-P-T martensitic has more retained austenite (10.8%) than Q&T (less 3%), which makes martensitc possess higher strain hardening exponent true uniform elongation steel. high value (n) (εu) stem from low initial dislocation...
The carburizing and quenching process of 18CrNiMo7-6 steel was performed through simulation methods experiments. study carried out to accurately predict the residual stress distribution carburized samples after process. retained-austenite amount were measured via X-ray diffraction. Similarly, carbon content determined using a sulfur analyzer, respectively. A detailed model with coupling thermal, metallic, mechanical fields built evolution field during “thoroughly” specimens at different...
Based on the previous study of Cr-containing Fe-0.63C-1.52Mn-1.49Si-0.62Cr-0.036Nb high carbon steel, although normalization process as a pretreatment quenching–partitioning–tempering (Q-P-T) was performed in this steel to raise ductility, its impact toughness only is 7.4 J/cm2. Microstructural characterization reveals that strain-induced twin-type martensite transformed from considerable chunky retained austenite destroys toughness. Therefore, novel Cr-free Fe-0.67C-1.52Mn-1.49Si-0.038Nb...
Fe–0.67C–1.55Mn–1.99Al–0.60Cr–0.038Nb (Fe–2Al) and Fe–0.63C–1.52Mn–1.49Si–0.62Cr–0.036Nb (wt.%) (Fe–1.5Si) were designed both subjected to novel quenching–partitioning–tempering (Q–P–T) process, the effect of 2 wt.% Al replacing 1.5 Si on mechanical properties was studied. The Fe–2Al Q–P–T martensitic steel exhibited a tensile strength 1640 MPa elongation 21.1% accompanied with product (PSE) 43.65 GPa %, which is superior third generation advanced high 30 %. While Fe–1.5Si 1.950 GPa, total...