A5078482624- High Entropy Alloys Studies
- Additive Manufacturing Materials and Processes
- High-Temperature Coating Behaviors
- Advanced materials and composites
- Intermetallics and Advanced Alloy Properties
- Titanium Alloys Microstructure and Properties
- Metal Alloys Wear and Properties
- Welding Techniques and Residual Stresses
- Anodic Oxide Films and Nanostructures
- Manufacturing Process and Optimization
- MXene and MAX Phase Materials
- Semiconductor materials and interfaces
- Metallurgy and Material Forming
- Advanced Materials Characterization Techniques
- Bone Tissue Engineering Materials
University of Science and Technology Beijing
2022-2023
Ultra-high-speed laser cladding (UHSLC) is an effective way to deposit Inconel 625 coatings on 27SiMn steel prolong its service life. However, elemental segregation in the serious and high-speed remelting (HSLR) was investigated order tackle issue. The HSLR treatment also found reduce surface roughness of UHSLC significantly, while enhancing their wear resistance. Furthermore, finite element simulation suggests that a higher power may result better melt pool fluidity more uniform composition...
Establishing the relationship between thermal cycling and induced evolution of microstructures cladding layer properties is crucial to achieving microstructural performance control, given complexity involved in high-speed laser process. We hereby report our new findings from Inconel 625 on Q245R steel substrate using a technique. The microstructure microhardness variations first track with different cycles were examined by XRD, SEM, EBSD, TEM, tests detail. Numerical simulation was also...
In this study, ultra-high-speed laser cladding (UHSLC) and traditional low-speed (LSLC) were employed to prepare high-quality Inconel625 coatings on 27SiMn substrates. UHSLC has speeds of 30 m/min, which are 15 times faster than those LSLC, it produces a much greater efficiency, is 13.9 LSLC. The microstructure the was investigated in detail utilizing field emission scanning electron microscopy (FESEM) probe microanalyzer (EPMA). According FESEM results, have more refined crystals LSLC...
Wear and corrosion resistant properties of high entropy alloy coatings (HEAC) on H13 steel are particular interest for industrial applications. The CoCrFeNi HEA/WC composite (HEACC) developed in this study were successfully prepared by incorporating 10–40 wt.% WC into a matrix HEA using laser cladding an substrate. Phase transformation, microstructure evolution, microhardness, wear resistance HEACC investigated. According to the results, all exhibited higher than first increases then...
Here, an electron beam selective melting (EBM) technique was employed to shape Ti-48Al-2Cr-2Nb alloy combat its intrinsic brittleness and insufficient hot workability. Through process optimization, high-density samples (4.2327 g/cm3) were produced. First, the mechanism of interaction between phase transformation microstructural evolution EBM-formed investigated using scanning microscopy (SEM), X-ray diffraction (XRD), backscattering (EBSD). And then, tensile properties discussed. Based on...
An electromagnetic field-assisted (EMF-assisted) laser cladding technique was used to prepare Norem02 iron-based cemented carbide coatings on 304 stainless steels. The then were characterized in terms of their microstructure, microhardness, residual stress, and wear resistance. results indicated that EMF did not change the phase composition coating, but significantly affected its microstructure properties. accelerated formation more uniform refined microstructure. With an increasing current...
Co-Cr-Fe-Ni-Ta eutectic multi-principal element alloys (MPEAs) demonstrate great potential to replace structural in engineering applications. However, the cost of these is high due usage a number precious metals. To decrease cost, present work developed set novel Fe55Cr15Ni30−xTax (x = 0, 5, 8, 10 and 15 at.%) MPEAs effect Ta on microstructure compressive mechanical properties were investigated for first time. As content increases, change from single-phase FCC solid solution 0) hypoeutectic...
Highlights1. The higher laser scanning speed leads to more turbulent convection in the molten pool.2. Fe flow along outer surface from bottom topmost of Cu cladding layer.3. Severe segregation occurs on layer.
Utilizing ultra-high-speed laser cladding (UHSLC) to deposit Inconel625 coatings onto surfaces of 27SiMn steel is an effective way for prolonging its service life. However, surface properties 625 will be compromised by the severe elemental segregation present in during UHSLC process. In order combat this issue, high-speed remelting (HSLR) modification technique was used work improve distribution elements coatings. It interesting note that roughness decreases significantly after optimal HSLR...