### A study on the CO2 laser welding characteristics of high

Findings:Laser welding is known to be a low heat input process because of its high heat density and welding speed. But for laser welding of ultra high strength steel with strength over 780 MPa, micro-structural softening was observed in the HAZ (heat affected zone), resulting from dissolved martensite. CFRP is Demanding Also on Laser Cuttingfor minimizing the heat-affected zone (HAZ) in [2]. With ultrashort-pulsed lasers and a fast beam-deflecting device to avoid excessive pulse overlapping, the best edge quality in CFRP laser cutting is possible. However, present drawbacks of using ultrashort pulsed or short pulsed lasers are low processing speeds and high costs of investment and oper-

### Evaluation of Alternatives to Domestic Ion Exchange

water by using water softening devices in their homes. The most common domestic water softening device uses ion exchange technology which releases additional salts to the waste stream. Consumers are reducing hardness in their homes but increasing TDS levels in reclaimed wastewater! (Not a sustainable practice) Micro-hole drilling and cutting using femtosecond fiber materials and the effect of the laser parameters on the trench properties was investigated. 2 Methods and Materials Figure 1 shows the sketch of the work station used in this study for laser micro-holes drilling and cutting. The fs laser system is a commercial mode-locked fiber laser (Uranus Series, PolarOnyx Laser Inc., San Jose, California Phonon softening and crystallographic orientation of cm1 (smooth overlapping curves), as extracted from the polarization study shown below (Fig. 3B). The difference between the G band data and the ts is attributed to scattering from the PDMS substrate. (C) The variation of the phonon frequencies of 2D, G and G bands from A and B as a function of strain. The solid lines are linear ts.

### Phys. Rev. B 96, 064103 (2017) - Lattice dynamics of Dirac

Aug 04, 2017 · We report a comprehensive study of lattice dynamics of the Dirac node-line semimetal ZrSiS single crystal by Raman spectroscopy and first-principles calculations. The weak covalent bonding between ZrSiS layers is confirmed by the absence of low-frequency shear or breathing Raman modes down to $15\phantom{\rule{0.16em}{0ex}}\mathrm{c}{\mathrm{m}}^{\ensuremath{-}1}$. Processing and Characterization of ZR-Based Metallic In this study, Zirconium powder was alloyed with Aluminum, Nickel and Copper at an atomic ratio of 65:10:10:15, respectively. Original powders were mixed by high energy ball milling, and a Zr65Al10Ni10Cu15 amorphous structure was manufactured via laser direct deposition. The laser power and laser scanning speed were optimized towards an increase of Synthesis and Characterization of High-Entropy Alloy A l

• AbstractIntroductionExperimental ProceduresResults and DiscussionConclusionAcknowledgmentsHigh-entropy alloys have been recently found to have novel microstructures and unique properties. In this study, a novel FeCoNiCuCr high-entropy alloy was prepared by laser cladding. The microstructure, chemical composition, and constituent phases of the synthesized alloy were characterized by SEM, EDS, XRD, and TEM, respectively. High-temperature hardness was also evaluated. Experimental results demonstrate that the FeCoNiCuCr clad layer is composed of only BCC and FCC phases. The clad layeExperimental study on characteristics of laser metal Jan 25, 2019 · In laser material processing, the input power is controlled by the intensity of the laser beam irradiated on the substrate. Higher laser beam leads to higher input power and contrariwise. The optical micrograph of the Substrate (Ti6Al4V alloy) is shown in figure 1 with alpha and beta phases found in the microstructure of titanium alloy.

### The effect of the laser spots overlap on the structure

Design/methodology/approach:The effect of laser spots overlap was investigated on tool steels. The material was quenched by a Nd:YAG laser Laserline LDF 4000 with a maximal power of 4 kV. The laser set was supplemented by an industrial robot. Findings:The laser quenching is the unconventional method of heat treatment.Laser Treatment for Strengthening of Thin Sheet Steel

• AbstractIntroductionMaterialMethodsResultsConclusionsThis paper presents the results of computer simulations and experimental studies, aiming to increase the mechanical strength of sheet metal parts manufactured from high-quality structural carbon steel by means of local laser processing. The effects of laser processing on the strength of steel sheet plates and their ability to resist bend load after laser treatment were studied. The results of bending experiments and computer simulations of elastoplastic deformation establish that local laser processing with surface meltDynamic control of laser beam shape for heat treatment Jun 26, 2018 · C. Yao, B. Xu, J. Huang, P. Zhang, and Y. Wu, Study on the softening in overlapping zone by laser-overlapping scanning surface hardening for carbon and alloyed steel. Opt. Lasers Eng. 48, 20 26 (2010). https://doi/10.1016/j.optlaseng.2009.05.001, Google Scholar Crossref; 8.