Fengchao Lang

ORCID: 0000-0002-4326-4490
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About
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Research Areas
  • Metal and Thin Film Mechanics
  • Advanced Surface Polishing Techniques
  • Mechanical Behavior of Composites
  • Aluminum Alloys Composites Properties
  • Microstructure and mechanical properties
  • Surface Treatment and Residual Stress
  • Fiber-reinforced polymer composites
  • Advanced ceramic materials synthesis
  • Advanced Welding Techniques Analysis
  • Diamond and Carbon-based Materials Research
  • Textile materials and evaluations
  • Advanced MEMS and NEMS Technologies
  • Tribology and Wear Analysis
  • Aluminum Alloy Microstructure Properties
  • Optical measurement and interference techniques
  • Fatigue and fracture mechanics
  • Metal Alloys Wear and Properties
  • Force Microscopy Techniques and Applications
  • High-Velocity Impact and Material Behavior
  • Structural Behavior of Reinforced Concrete
  • Boron and Carbon Nanomaterials Research
  • Concrete Properties and Behavior
  • Ferroelectric and Piezoelectric Materials
  • Welding Techniques and Residual Stresses
  • Optical Coatings and Gratings

Inner Mongolia University of Technology
2008-2024

Mongolian University of Science and Technology
2009

Dalian University of Technology
2008

SiO2 thin films are widely used in micro-electro-mechanical systems, integrated circuits and optical film devices. Tremendous efforts have been devoted to studying the preparation technology properties of films, but little attention has paid their mechanical properties. Herein, surface morphology 500-nm-thick, 1000-nm-thick 2000-nm-thick on Si substrates was observed by atomic force microscopy. The hardnesses three with different thicknesses were investigated nanoindentation technique,...

10.3390/coatings11010023 article EN Coatings 2020-12-27

In this study, nanoindentation tests at three different strain rates within 100 nm indentation depth were conducted on an a-plane (112¯0) ZnO single crystal to investigate the effect of rate its nano-scale mechanical behavior. The load-indentation-depth curves, pop-in events, hardness and Young's moduli investigated level. results indicated that, with increasing, load increased gradually each maximum depth, hma, during loading process. A distinct event occurred curve except that...

10.3390/mi14020404 article EN cc-by Micromachines 2023-02-08

A nanostructured surface layer (NSSL) was generated on a 316L stainless steel plate through nanocrystallization (SNC). The grains of the were refined to nanoscale after SNC treatment. Moreover, microstructure and mechanical properties NSSL analyzed with transmission electron microscope (TEM) scanning (SEM), nanoindentation, reverse analysis finite element method (FEM). TEM results showed that in measured 8 nm. In addition, these nanocrystalline took form random crystallographic orientation...

10.1155/2016/7517616 article EN cc-by Advances in Materials Science and Engineering 2016-01-01

The mechanical properties of the interphase play a key role in determining overall performance carbon fiber reinforced polymer (CFRP) composite materials. For this reason, it is important to develop method easily and precisely investigate CFRP In work, surface topography material was examined using scanning probe microscopy (SPM), which revealed polished flat sample can meet requirements nanoindentation testing. local determined based on continuous stiffness measurement (CSM) method. results...

10.1177/07316844211063571 article EN Journal of Reinforced Plastics and Composites 2021-12-30

The present study aimed to experimentally evaluate the mechanical properties of Pb(In1/2Nb1/2)O3–Pb(Mg1/3Nb2/3)O3–PbTiO3 (PIN–PMN–PT) bulk single crystals with different crystallographic directions using nanoindentation technique. load–indentation depth curves, elastic and plastic deformations, hardnesses, Young’s moduli [100]- [110]-oriented 0.28PIN–0.43PMN–0.29PT were investigated. Our results show that an increase in maximum indentation hmax, residual percentage increased for both...

10.3390/cryst10010028 article EN cc-by Crystals 2020-01-08

Abstract To explore the impact of high-intensity ultraviolet light on structure and mechanical properties sisal fibers, article uses chemical methods in fiber surface silver-plated, untreated, alkali-treated fibers as a comparison, with help scanning electron microscopy, infrared spectroscopy topography, molecular research, determination irradiation under tensile fiber. Exposure to radiation for brief period results reduction strength, fracture elongation, elastic modulus alkali-treated,...

10.1088/1742-6596/2783/1/012004 article EN Journal of Physics Conference Series 2024-06-01

Abstract GH4169 is a precipitation‐strengthened nickel‐based high‐temperature alloy, and its mechanical behavior at different temperatures of significant importance for practical applications. Here, an in situ study on the properties microstructural evolution alloy was conducted using scanning electron microscopy combination with digital image correlation. The results demonstrate existence linear relationship between local average strain macroscopic strain. At 20 °C, 100 180 260 1.96, 2.13,...

10.1002/mawe.202300392 article EN Materialwissenschaft und Werkstofftechnik 2024-10-22

In situ scanning electron microscopy three-point bending test was employed in this study to investigate the crack initiation and propagation 5A05 aluminum alloy. The microscale strain fields around tip were measured by using geometric phase analysis method. Results show that prior initiation, normal εyy (y direction is perpendicular load direction) tensile notch, whereas εxx (x parallel compressive notch. shear εxy nearly zero. With increase load, strains gradually increased, but change not...

10.3390/met8090685 article EN cc-by Metals 2018-08-31
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