The research interest in wearable electronics has continuously stimulated the development of flexible energy storage systems with high performance and robustness.

In this work, it is demonstrated that direct laser interference patterning (DLIP) a method capable of producing microtextured metallic molds for hot embossing processes. Three different metals (Cr, Ni, and Cu), relevant the mold production used in nanoimprinting systems, are patterned by DLIP using picosecond source emitting at 532 nm wavelength. The results show quality surface topography produced hole-like micropatterns determined processing parameters, such as irradiated energy density...

In this study, bioceramics of alumina, zirconia, and silica were synthesized through Nd:YAG laser sintering process aiming at studying the microstructure phase composition based on various processing parameters used. Optimal scanning speed average power for selective determined. Effect shifting consecutive single vector forming monolayer was also studied. Following synthesis, structure characterized by electron microscopy analyzing X-ray diffraction. The results help understand...

Friction stir welding (FSW) is a solid-state joining technique which can produce high-quality joints efficiently. The residual stresses in FSW are generated due to the effect of both uneven temperature field and tool force, different from that fusion welding. In this study 3mm-thick 2024-T4 aluminum alloy have been investigated by using Hole-drilling method. To reduce influence drilling upon experimental results, annealed stress-free 2024 plates were drilled; relieved strains measured...

A pulsed fiber laser was used to conduct cleaning experiments on the composite paint layer surface of carbon materials (carbon fiber-reinforced plastic (CFRP)). The influence energy density and travel speed effect studied. morphology, roughness phase composition cleaned sample were analyzed. After bonding, tensile testing conducted bonding part verify impact performance. research results indicate that gradually improves with increase or decrease speed. In this experiment, when is...

Solid solutions of Zn as an alloy element in Mg matrixes are expected to show improved corrosion resistance due the electrode potential being positively shifted. In this study, a supersaturated solid solution Mg-Zn was achieved using mechanical alloying (MA) combined with laser sintering. detail, powders were firstly prepared MA, it able break through limit phase diagram under action forced impact. Then, alloyed shaped into parts sintering, during which limited liquid and short cooling time...

Metal powder delivery systems have been used widely in Direct Laser Deposition (DLD) processes. Most current commercial DLD use a gas to carry the metallic powders point of through feed tube and then nozzle. The major drawback this method is that wastage expensive very high.. To overcome or mitigate process deficiency, gas-free Powder Delivery System (PDS) has developed. system uses sonic/ultrasonic vibration exert distributed driving force on assist its deliver laser generated melt pool....

According to the change characteristics in toughness of metal material during fatigue damage process, tests were carried out with standard 18CrNiMo7-6 material. Scanning fracture an electron microscope explains lack linear cumulative mechanism. obtained results, a nonlinear accumulation model which considered loading sequence state under dissipation was established. The recursive formula devised two-level. test data verification three materials showed that using this predict life is...

Residual strength is one of the important properties materials and basis for material fatigue life prediction. In this article, residual 18CrNiMo7-6, a commonly used wind power gears, degraded with load load. According to law damage generation development, degradation model proposed. comparison between test results model, accuracy proposed high. When number loading/total cycles close 0.7, intensity will change significantly. It helpful further study reliability gears under high cycle fatigue.

Abstract A deethanizer made of 16MnDR steel was found medium leakage used by a company shortly after weld repair. The cause the welding crack analyzed means morphology examination, chemical composition analysis and hardness test, residual stress metallographic microscopic analysis. results show that produced pressure vessel repair is typical liquefaction metal. Improper control operation process in abnormal microstructure, excessive at position, which leads to formation longitudinal...

Chitosan nonwoven mesh conduit was introduced with perforating pores on the wall by laser-drilling process. The pore size set at 200 µm and interval 1mm. Twelve mm long grafts of following 4 groups (N=5, respectively) were implanted to rat sciatic nerve defects: non-pore, 2 lines pores, isograft. After 12 weeks standard function evaluations performed including functional test, electro conductivity test histological analysis. It found that revascularization contents improved drilled, but...

The welding joint method is usually applied in the reinforcing process of steel moment frame connections. parameters are chosen and discussed finite element analysis employed to analyze completely penetration weld between flange plates column flange. three-dimensional thermo-structure simulation conducted. Furthermore, influence residual stresses on loading capacity reinforced connection discussed. temperature field during distribution given. existence will highly increase likelihood brittle...

Microscale laser peen forming (µLPF) is a novel plastic process which utilizes induced shock waves to deform the 3D profiles. In this paper, three fracture modes were discovered during µLPF processes, at centre of formed dome (mode I), tensile-tearing near die entrance II), and shear fringe spot III). The dynamic explicit finite element method together with constrained-nodes-failure employed simulate formation propagation fractures in µLPF, four nodes shell elements tied instead being merged...

Abstract In the numerical simulation of welding residual stress (WRS), thermal fields distribution weld beads during process is basic data to calculate due expansion and extraction. Different heat input control method had been proposed used in WRS finite element (FEM) analysis, such as based on theory, controlled by temperature monitoring point so on. Some disadvantages like less calculating efficiency, unexpected variation have found these methods. Based study FEM result through butter...