Vibration signal analysis is an important means for bearing fault detection/diagnosis and bearings often operate under time-varying rotational speed conditions. This data article contains vibration datasets collected from with different health conditions The of the include healthy, faulty inner race defect, outer defect. operating dataset increasing speed, decreasing then speed. Mendeley Data, http://dx.doi.org/10.17632/v43hmbwxpm.1.

Micro-hole drilling and cutting in ambient air are presented by using a femtosecond fiber laser. At first, the micro-hole was investigated both transparent (glasses) nontransparent (metals tissues) materials. The shape morphology of holes were characterized evaluated with optical scanning electron microscopy. Debris-free micro-holes good roundness no thermal damage demonstrated aspect ratio 8∶1 . hard soft tissues crack or collateral is also demonstrated. Then, trench micromachining studied...

Vertically oriented CuInS(2) nanosheet thin films were prepared via a facile one-step solvothermal process and used in dye-sensitized solar cells (DSSCs) as counter electrodes. The catalytic activity of the based on different precursor concentrations was investigated using electrochemical methods. DSSCs optimized film electrodes reached power conversion efficiency 6.33%, comparable to that sputtering Pt (6.07%).

The reactive adsorption behavior of thiophene over the reduced NiZnO/Al2O3-diatomite adsorbent was characterized by in situ Fourier transform infrared (FTIR) spectroscopy. X-ray diffraction (XRD) technology used to investigate phase change sulfur species desulfurization (RADS) process. results indicated that S–M bonding on metallic Ni sites first decomposed form Ni3S2 while formed C4 olefins were further saturated hydrogen butane which released back into process stream, followed transfer...

This study presents an unprecedented high throughput processing for super-blackening and superhydrophobic/hydrophilic surface on both planar nonplanar metals surfaces. By using a pulse repetition rate femtosecond (fs) fiber laser, light trapping microstructure nanostructure is generated to absorb from UV, visible long-wave infrared spectral region. Different types of structures are produced with varying laser scanning conditions (scanning speed pitch). The modified morphologies characterized...

Thin-layer separation and micro-fabrication of poly(dimethylsiloxane) (PDMS) polymers are conducted via an ultra-short pulsed laser having a pulse width 900 fs lasing at infrared wavelength 1552 nm. The plasma-mediated ablation threshold the PDMS is analyzed as 4.6 J cm−2 for single irradiation. reduces with increasing pulses due to accumulation effect, incubation factor obtained 0.52. influences two key factors—pulse overlap rate irradiation energy—on line width, internal interface depth...

In this paper, methods of welding and sealing optically transparent materials using an ultrashort pulsed (USP) fiber laser are demonstrated which overcome the limit small area optical materials. First, interaction USP radiation inside glass was studied single line results with different parameters were investigated. Then multiline scanning used to obtain successful bonding. Finally, complete four-edge fused silica substrates a hermetic seal confirmed by water immersion test. This...

Additive manufacturing (AM) is promising to produce complex shaped components, including metals and alloys, meet requirements from different industries such as aerospace, defense biomedicines. Current laser AM uses CW lasers very few publications have been reported for using pulsed (esp. ultrafast lasers). In this paper, additive of Tungsten materials investigated by femtosecond (fs) fiber lasers. Various processing conditions are studied, which leads desired characteristics in terms...

Vibration signal analysis is an important technique for bearing fault diagnosis. For bearings operating under constant rotational speed, faults can be diagnosed in the frequency domain since each type of has a specific Fault Characteristic Frequency (FCF), which proportional to shaft speed. However, often operate time-varying speed conditions. Additionally, measurement requires instruments, such as tachometers, leads extra cost and installation. With development time-frequency analysis, FCFs...

In vitro layer separation of human dermal tissues via laser plasma-mediated ablation was successfully conducted for the first time. The wet dermis generated using a 900 fs ultra-short pulsed with wavelength centred at 1552 nm. and results were imaged measured by scanning electron microscopy. threshold determined as 9.65 ± 1.21 J cm−2 incubation factor found 0.46 0.03. Histological examinations performed to find proper parameters minimal thermal damage. No damage in single line when pulse...

Removal of organic sulfur compounds from its solution has been investigated by using adsorption. The purpose this study is to investigate the removal dimethyl disulfide (DMDS) in liquid hydrocarbon streams with bentonite modified Ag+. addition Ag+ on significantly enhanced adsorption capacity DMDS. adsorbents were characterized nitrogen adsorption, X-ray diffraction (XRD), and thermal analysis (TGA). Fourier transform infrared (FT-IR) spectroscopy showed that type number surface acidic sites...

A laser-induced breakdown spectroscopy (LIBS) guided smart surgical tool using a femtosecond fiber laser is developed. This system provides real-time material identification by processing and analyzing the peak intensity ratio of atomic emissions LIBS signals. Algorithms to identify different tissues metals are developed implemented into control system. powerful for precise robotic microsurgery applications with feedback control.

Reactive adsorption desulfurization (RADS) experiments were conducted over a series of commercial metal oxide supports (<TEX>$Al_2O_{3-}$</TEX>, <TEX>$SiO_{2-}$</TEX>, <TEX>$TiO_{2-}$</TEX> and <TEX>$ZrO_{2-}$</TEX>) supported Ni/ZnO adsorbents. The adsorbents characterized by X-ray diffraction (XRD), temperature programmed reduction (TPR), Fourier transform infrared spectroscopy (FTIR) in order to find out the influence specific types surface chemistry structural characteristics on sulfur...

This paper presents what is to our knowledge the first evaluation of laser-induced breakdown spectroscopy (LIBS) studies on elemental composition detection and identification by employing a femtosecond (fs) fiber laser. Qualitative LIBS spectra were obtained in ambient air using 1030 nm fs Specific ion neutral emission lines different materials have been characterized, including metal, metal alloy, semiconductor, glass. The performance an intensified CCD (ICCD) system nonintensified...

Abstract As a carbon-free hydrogen-rich energy carrier, ammonia has gained increasing attention and application in the context of carbon peaking neutrality. This study evaluated stress corrosion cracking (SCC) sensitivity four target materials, A516-70, 16MnDR, 15MnNiDR, Q370DR, liquid environment at 25 °C 1.03 MPa by slow rate tests to determine their SCC index. The microstructure, grain size, misorientation, hardness, strength, micro-fracture morphology these materials were compared...

Femtosecond (fs)‐laser processing of CdS x Se 1‐x ‐doped borosilicate glasses was investigated to create hybrid multiscale structures consisting semiconductor nanocrystals embedded in microscopic domains defined by the laser irradiation. Laser carried out with both low (1 KHz) and high MHz) repetition rate fs‐lasers using pulse fluences between 2 2000 J/cm sample scan speeds ranging from 0.05 4 mm/s. The samples were subsequently heat‐treated at temperatures 500 600°C characterized optical...