Electropulsing (EP)-assisted laser shock peening (LSP), involving the synchronous application of EP and LSP to Ti-6Al-4V samples, represents an innovative
Polymeric-based dielectric materials hold great potential as energy storage media in electrostatic capacitors. However, the inferior thermal resistance of polymers leads to
metallic surface peening using femtosecond laser pulses to improve the surface hardness, corrosion resistance and fatigue properties [16–18], the underlying peening mechanism at atomic view is still elusive. In this work, we studied the femtosecond laser peening (FLP) on stainless steel surface without sacrificial overlay and confinement
Advanced surface engineering technology will lay the technical foundation for the advanced design and manufacturing of modern machinery and solve the bottlenecks of sophisticated equipment such as reliability and life [40]. In recent years, research on various carbide surface-strengthening technologies has gradually increased. We used the
Here we have introduced the nondestructive laser peening using femtosecond lasers with ultrahigh pulse density and ultralow pulse energy by a combined approach of experiment, finite element analysis, and molecular dynamics simulations, taken stainless steel as a paradigm. A reinforcement of 33.6 % was achieved on surface hardness of American National Standards
Regular dents are produced at the material surface with relatively low pulse energies, and the regular dent morphology disappears gradually with increasing pulse energy, suggesting an increased
Compared to traditional surface strengthening techniques, LSP provides the advantages of high machining precision and flexibility, achieving surface strengthening with minimal surface damage. This study conducted a series of LSP experiments on the additively manufactured Cu Sn alloy with varying single pulse energy, which achieving defects healing
Surface Strengthening of Polymer Composite Dielectrics for Superior High‐Temperature Capacitive Energy Storage . 用于优异高温电容储能的聚合物复合电介质的表面强化 . 相关领域. 材料科学 复合数 储能 电介质 电容感应 复合材料 聚合物 曲面（拓扑） 工程物理 光电子学 电气工程 热力学 功率（物理） 物理 几何学 数学
2. Research Progress on the Enhancement of HSS''s Surface Characteristics by High-Energy Beam Remelting. Typically, the principle of using a laser as a heat source for remelting and strengthening HSS is to use laser scanning to heat the surface of the material, which triggers the surface of the substrate to melt and then rely on the self-excited cooling of the substrate
Polymer dielectrics for high-temperature capacitive energy storage suffer from low energy density and poor efficiency, which is mainly attributed to the exponential growth of conduction loss at high electric fields. Here, a surface strengthening strategy to inhibit the
Surface topography of (f) pristine ANSI 304 stainless steel, steel surface processed by FLP (g, h, i) with pulse energy of 0.25 μJ (fluence of 0.3 J cm −2) and laser energy density of 0.5, 1, 1.5 × 10 4 J cm −2, respectively. (Sa: arithmetic mean deviation of surface roughness; Sq: root mean square deviation of surface roughness; Sz: maximum height of profile.)
1 Surface Strengthening of Stainless Steels by Nondestructive Laser Peening Pengjie Wang1, Qiang Cao1, *, Sheng Liu1 and Qing Peng 2,3 1The Institute of Technological Sciences, Wuhan University
Despite increased surface roughness, the synergistic action of compressive residual stress, work hardening, and heterogeneous near-surface microstructure prolongs the
A reinforcement of 33.6 % was achieved on surface hardness of American National Standards Institute (ANSI) 301 stainless steel with the pulse energy of 0.375 μJ (fluence of 0.45 J cm⁻²) and
Disordered polarization and distribution, chemical inhomogeneity, and insulating boundary layers are achieved to provide the fundamental structural origin of the relaxation
Li et al. [44,45] strengthened the surface of M2 HSS with a plasma beam, and the hardness of M2 HSS increased by approximately 150 HV in the near-surface layer of approximately 250 μm under the working condition treatment of an acceleration voltage of 200 kV, beam density of 180 A/cm 2, the pulse width of 150 μs, and a number of pulses of 10 times.
In addition, the mechanism of USRP on the microstructure evolution and plastic deformation of materials during the composite strengthening process is analyzed, and the current research status of these technologies in improving the surface strengthening effect and meeting the complex service requirements is summarized. Finally, the application prospect and development
The surface strengthening effect of MHP treatment mainly originates from the increase of dislocation density, grain misorientation and refinement, which are caused by impacts of the punching head; while the surface smoothening effect is the result of precisely controlled and regularly aligned punching indents. Utilizing MHP in the manufacturing process chain of
待审核 Advanced Energy Materials - 2025 - Wang - Surface Strengthening of Polymer Composite Dielectrics for Superior.pdf (2.97 MB) 回复 35秒前 科研通AI2.0 机器人 未找到该文献,机器人已退出,请等待人工下载
The modification of materials'' surfaces can be attributed to a number of factors, including the transmission of energy, thermal and chemical reactions, elastic–plastic deformation, and the precipitation of elements during the formation of micro-texture coatings [7], [8] the process of machining the groove array micro-texture on the surface of stainless steel using ultrasonic
During the preparation, use and storage of carbon coating materials, All experiments were performed under the constant frequency and duty cycle of the rectangular pulse current method [178], [179], [180]. The XRD method was used to detect pure aluminum and titanium carbide on the surface of the processed sample. The corrosion resistance of the
Laser peening is an advanced technology for surface engineering. However, the unintentional surface destruction due to melting degrades the quality and reduces the corrosion resistance. Here we have introduced the nondestructive laser peening using femtosecond lasers with ultrahigh pulse density and ultralow pulse energy by a combined approach of experiment, finite
Compared with traditional laser shock peening by nanosecond pulse laser, femtosecond laser shock peening (FLSP) exhibits superior flexibility and efficiency since it can be carried out directly in air without any ablative or confinement layers. In this work, FLSP was successfully performed on AZ31 magnesium alloy sheet. The influence of pulse energy on surface morphology and
Polymer dielectrics for high-temperature capacitive energy storage suffer from low energy density and poor efficiency, which is mainly attributed to the exponential growth of conduction loss at high electric fields. Here, a surface strengthening strategy to inhibit the electrode-limited conduction loss of polymer composite dielectrics is reported.
Our research establishes a relationship between local lattice distortion, atomic polar displacement, and energy-storage performance in complex high-entropy systems,
ABSTRACT In this study, the surface strengthening and smoothening combined effect of the mechanical hammer peening (MHP) treatment is demonstrated. On a IN718 nickel-based superalloy workpiece surface, the MHP treatment introduced a subsurface residual stress field featured with a maximum stress around −1.4 GPa and a penetration depth exceeding 1 mm,
Compared to traditional surface strengthening techniques, LSP provides the advantages of high machining precision and flexibility, achieving surface strengthening with minimal surface damage. This study conducted a series of LSP experiments on the additively manufactured Cu Sn alloy with varying single pulse energy, which achieving defects healing and introducing CRS into
Therefore, make assumptions for the single pulse EDM surface strengthening process: (1) the workpieces materials are homogeneous and isotropic, ignore the surface defects such as micro cracks and micro holes; (2) material thermal performance is a function changes with the temperature, considering the latent influence, ignore the surface material''s evaporation and
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