Xiaoqiang Peng
YOU?
Author Swipe
View article: Microstructural and Mechanical Property Variations in 316L Stainless Steel Fabricated by Laser Powder Bed Fusion Under High-Density Processing Conditions
Microstructural and Mechanical Property Variations in 316L Stainless Steel Fabricated by Laser Powder Bed Fusion Under High-Density Processing Conditions Open
It has become a trend to precisely control the additive manufacturing process parameters within the high-density process window to obtain high-performance metal parts. However, there are few reports on this topic currently, leaving this re…
View article: Coupling effects of laser assistance and tool rake angle on brittle-ductile transition in monocrystalline silicon
Coupling effects of laser assistance and tool rake angle on brittle-ductile transition in monocrystalline silicon Open
View article: Research on Optimized Design of In Situ Dynamic Variable-Aperture Device for Variable-Spot Ion Beam Figuring
Research on Optimized Design of In Situ Dynamic Variable-Aperture Device for Variable-Spot Ion Beam Figuring Open
Ion beam figuring (IBF) is an ultra-high-precision surface finishing technology characterized by a distinct trade-off between the spot size of the removal function and its corresponding figuring capabilities. A larger spot size for the rem…
View article: Mechanical Properties Regulation of Invar36 Alloy Metastructures Manufactured by Laser Powder Bed Fusion
Mechanical Properties Regulation of Invar36 Alloy Metastructures Manufactured by Laser Powder Bed Fusion Open
Invar36 alloy, renowned for its exceptionally low coefficient of thermal expansion and excellent mechanical properties, is widely used in precision instruments, high-accuracy molds, and related fields. Metastructures fabricated via laser p…
View article: Deterministic method for generating removal functions through online beam density regulation
Deterministic method for generating removal functions through online beam density regulation Open
Ion beam figuring (IBF) technology, characterized by atomic-level material removal, has become a core process in ultra-high-precision optical manufacturing. The realization of ultra-high-precision optical element figuring necessitates full…
View article: A Novel High-Precision Workpiece Self-Positioning Method for Improving the Convergence Ratio of Optical Components in Magnetorheological Finishing
A Novel High-Precision Workpiece Self-Positioning Method for Improving the Convergence Ratio of Optical Components in Magnetorheological Finishing Open
Magnetorheological finishing is widely used in the high-precision processing of optical components, but due to the influence of multi-source system errors, the convergence of single-pass magnetorheological finishing (MRF) is limited. Altho…
View article: Research on prevention and control strategies for passenger group events due to flight delays based on multi-agent modelling
Research on prevention and control strategies for passenger group events due to flight delays based on multi-agent modelling Open
View article: Study on the Coupling Influence of Temperature and Tool Rake Angle on the Ductile–Brittle Transformation of Monocrystalline Silicon
Study on the Coupling Influence of Temperature and Tool Rake Angle on the Ductile–Brittle Transformation of Monocrystalline Silicon Open
View article: Nvidia’s Long-Term Investing: A Value-Investing-Based Approach
Nvidia’s Long-Term Investing: A Value-Investing-Based Approach Open
View article: Functional microstructured surface polishing: mechanism and applications
Functional microstructured surface polishing: mechanism and applications Open
Functional microstructured surfaces are becoming increasingly important in the fields of optics, microfluidics, and surface engineering. These parts' functional surface roughnesses and microstructure molding accuracies directly affect thei…
View article: Multi-dimensional error figuring model for ion beams in X-ray mirrors
Multi-dimensional error figuring model for ion beams in X-ray mirrors Open
X-ray mirrors are core optical elements in synchrotron light sources, which are typically figured by ion beams. However, traditional ion beam figuring (IBF) methods cannot effectively correct both the height and 2D slope errors. Thus, what…
View article: Improving the surface quality and its mechanism in ultraprecision machining of Al–Mg–Si alloy by multiple high energy shot peening pretreatment
Improving the surface quality and its mechanism in ultraprecision machining of Al–Mg–Si alloy by multiple high energy shot peening pretreatment Open
Achieving high surface quality is vital for improving the reflectivity of aluminum alloy optical components. However, aluminum alloy materials often have large-sized grain structures, and stress accumulates at the grain boundaries during u…
View article: Super Capillary Performance of Hybrid-Structured Wicks Additively Manufactured Via Laser Powder Bed Fusion
Super Capillary Performance of Hybrid-Structured Wicks Additively Manufactured Via Laser Powder Bed Fusion Open
View article: High Strain Rate Flow Behaviors and Microstructure Evolution of Al-Mg-Si Alloy at Cryogenic Temperatures
High Strain Rate Flow Behaviors and Microstructure Evolution of Al-Mg-Si Alloy at Cryogenic Temperatures Open
View article: Large field optical imaging system based on freeform surface optics
Large field optical imaging system based on freeform surface optics Open
面向机载探测系统大视场光学成像的需求,开展了大视场光学成像系统光学设计、自由曲面光学元件超精密加工、形位误差同步检测以及系统集成与成像实验研究。首先,采用视场扩展法进行大视场自由曲面离轴反射光学系统的设计;其次,进行铝合金自由曲面反射镜纳米精度加工和高频抑制工艺探索,并实现了基于计算全息元件的自由曲面形位高精度检测;最后,进行了光学系统的装调集成与成像实验。结果表明,系统的视场角为30°×5°,全视场光学传递函数值大于0.7,接近衍射极限,最大像元均方根半径为2.075 μ…
View article: Relationship between machining accuracy and optical properties of convex blazed grating in ultra-precision cutting
Relationship between machining accuracy and optical properties of convex blazed grating in ultra-precision cutting Open
For ultra-precision machining of convex blazed grating elements there are inevitable machining errors, surface defects, and surface roughness, all of which can have an impact on their diffraction efficiency. In this paper, we use PCGrate s…
View article: Nano-Precision Processing of NiP Coating by Magnetorheological Finishing
Nano-Precision Processing of NiP Coating by Magnetorheological Finishing Open
NiP coating has excellent physicochemical properties and is one of the best materials for coating optical components. When processing NiP coatings on optical components, single-point diamond turning (SPDT) is generally adopted as the first…
View article: Modeling and Experimental Verification of Time-Controlled Grinding Removal Function for Optical Components
Modeling and Experimental Verification of Time-Controlled Grinding Removal Function for Optical Components Open
As a flexible grinding method with high efficiency, abrasive belt grinding has been widely used in the machining of mechanical parts. However, abrasive belt grinding has not been well applied in the field of ultra-precision optical process…
View article: Superior Mechanical Properties of Invar36 Alloy Lattices Structures Manufactured by Laser Powder Bed Fusion
Superior Mechanical Properties of Invar36 Alloy Lattices Structures Manufactured by Laser Powder Bed Fusion Open
Invar36 alloy is a low expansion alloy, and the triply periodic minimal surfaces (TPMS) structures have excellent lightweight, high energy absorption capacity and superior thermal and acoustic insulation properties. It is, however, difficu…
View article: Molecular dynamics simulation of the nano-cutting mechanism of a high-phosphorus NiP coating
Molecular dynamics simulation of the nano-cutting mechanism of a high-phosphorus NiP coating Open
Electroless nickel-phosphorus workpieces undergo a variety of surface/subsurface deformations and internal organizational changes throughout the nano-cutting process that have a major impact on the machining quality of microstructured func…
View article: Modeling and Simulation of Removal Function for Dual-axis Wheel Polishing
Modeling and Simulation of Removal Function for Dual-axis Wheel Polishing Open
Modern optical manufacturing techniques, such as stress disc polishing, bonnet polishing, magnetorheological finishing, and ion beam finishing, suffer from edge effects or low removal efficiency. To solve the above problems, this paper mai…
View article: High-performance Optical Manufacturing
High-performance Optical Manufacturing Open
摘要: 聚变点火、同步辐射、光刻机、深空探测、侦察预警等高端装备要实现一系列前所未有的极端性能,并朝着多样化和复杂化的方向发展。强光元件、同步辐射反射镜、掩膜版和光刻物镜、深空探测X射线反射镜等关键光学元件是这些系统实现聚焦、极高能量输出、极高峰值功率、极端尺寸光束聚焦和纳米尺度精确图案转印等极端性能的关键。要实现这些高端装备的极端性能,对核心关键元件的光学制造提出了高精度、低损伤、低应力、洁净制造和功构一体等要求,要求实现的是多物理参数约束下的高性能。元件的性能不仅由设计…
View article: Ultra-precision Cutting Characteristics of Convex Blazed Gratings with Electroless NiP
Ultra-precision Cutting Characteristics of Convex Blazed Gratings with Electroless NiP Open
摘要: 凸球面闪耀光栅的切削表面质量直接影响Offner型光谱成像系统的性能。采用微晶铝6061表面化学镀NiP作为凸球面闪耀光栅的材料,首先通过材料性能表征手段研究其切削性能;其次通过模拟二维楔形工件切削过程和三维凸面闪耀光栅切削过程来确定其最小未变形切屑厚度和研究刀具倾斜角度对切屑流动和应力分布的影响规律;最后通过改变进给方向对比凸球面闪耀光栅的切削表面质量。研究结果表明化学镀NiP表现出明显的非晶特性,涂层表面和内部的元素分布均匀,车削平面的粗糙度值Ra可达0.794…
View article: The Allocation of Geometrical Error of Scan-Coordinate Measurement Machine Based on Geometrical Error Sensitivity Analysis
The Allocation of Geometrical Error of Scan-Coordinate Measurement Machine Based on Geometrical Error Sensitivity Analysis Open
View article: Progress in the Preparation and Characterization of Convex Blazed Gratings for Hyper-Spectral Imaging Spectrometer: A Review
Progress in the Preparation and Characterization of Convex Blazed Gratings for Hyper-Spectral Imaging Spectrometer: A Review Open
Convex blazed gratings, which can effectively broaden the spectral range and improve spectral resolution, have gradually evolved into a crucial optical component for lightweight and compact imaging spectroscopy instruments. Their design, p…
View article: Self-calibration interferometric stitching test method for cylindrical surfaces
Self-calibration interferometric stitching test method for cylindrical surfaces Open
The surface figure accuracy requirement of cylindrical surfaces widely used in rotors of gyroscope, spindles of ultra-precision machine tools and high-energy laser systems is nearly 0.1 µm. Cylindricity measuring instrument that obtains 1-…
View article: A Method of Restraining the Adverse Effects of Grinding Marks on Small Aperture Aspheric Mirrors
A Method of Restraining the Adverse Effects of Grinding Marks on Small Aperture Aspheric Mirrors Open
The grinding method is used as the preliminary processing procedure for small aperture aspheric mirrors. Regular grinding marks produced in the grinding process significantly affect the mid-spatial frequency error; however, because of thei…
View article: A High Efficiency and Precision Smoothing Polishing Method for NiP Coating of Metal Mirror
A High Efficiency and Precision Smoothing Polishing Method for NiP Coating of Metal Mirror Open
The NiP coating has excellent wear and corrosion resistance, and electroless nickel-phosphorus coating is one of the best measures for surface modification of metal optical devices. The NiP layer could be processed by single-point diamond …
View article: Ultra-Precision Cutting and Characterization of Reflective Convex Spherical Blazed Grating Elements
Ultra-Precision Cutting and Characterization of Reflective Convex Spherical Blazed Grating Elements Open
In this work, based on the diffraction principle of reflective blazed grating, the structure size of the convex spherical blazed grating unit is determined, the machining accuracy of the convex spherical blazed grating is formulated, the e…
View article: Krüppel-like factor 4 promotes the proliferation and osteogenic differentiation of BMSCs through SOX2/IGF2 pathway
Krüppel-like factor 4 promotes the proliferation and osteogenic differentiation of BMSCs through SOX2/IGF2 pathway Open
Objectives: Human bone marrow mesenchymal stem cells (BMSCs) have multi-lineage differentiation potential and have been widely researched in regenerative medicine. The purpose of this research was to explore whether Krüppel-like factor 4 (…