Optimization of process parameters for minimum cutting temperature and surface roughness in turning of AISI 410 stainless steel impeller

In the present scenario of work, an investigation of experiment on CNC turning of AISI 410 stainless steel impeller has been brought into presentation. Turning parameters such as cutting speed (Cs), feed rate (Fr) and depth of cut (Dc) are taken into investigation and thus modeled for performance characteristics like cutting temperature (Ct) and surface roughness (Ra). The desirability function (Df) is employed in order to optimize the multi performance characteristics. In correspondence to the highest desirability, Cs: 80 m/min, Fr: 0.12 mm/rev and Dc: 0.59 are considered to be the optimal combination of process parameters. In result of Scanning electron microscopy (SEM), it denotes that the formation relating surface defect on AISI 410 are deposition of tool material particles, scratches and feed marks

Optimal corrosive behaviour on the weldment of AA6063 aluminum alloy by tungsten inert gas (TIG) welding process with backing plates

Pertaining on the present work on improving the corrosion resistance of AA 6063 aluminum alloy is found to weld with many backing plate materials like stainless steel, copper, marble and brass in accordance to the welding process that inherits itself with TIG. Utilizing the Orthogonal array L16, experiments were carried out. The corrosion resistance was improved by optimizing the pulsed TIG welding process parameters like current (A), gas flow rate (B), backing material (C) and backing thickness (D) using Genetic Algorithm (GA). Results proved that the GA shows a better corrosion resistance rate that was obtained to about 0,0408 mm/year with the backing material as copper

Preparation of polycaprolactone nanoparticles via supercritical carbon dioxide extraction of emulsions

Polycaprolactone (PCL) nanoparticles were produced via supercritical fluid extraction of emulsions (SFEE) using supercritical carbon dioxide (scCO2). The efficiency of the scCO2 extraction was investigated and compared to that of solvent extraction at atmospheric pressure. The effects of process parameters including polymer concentration (0.6–10% w/w in acetone), surfactant concentration (0.07 and 0.14% w/w) and polymer-to-surfactant weight ratio (1:1–16:1 w/w) on the particle size and surface morphology were also investigated. Spherical PCL nanoparticles with mean particle sizes between 190 and 350 nm were obtained depending on the polymer concentration, which was the most important factor where increase in the particle size was directly related to total polymer content in the formulation. Nanoparticles produced were analysed using dynamic light scattering and scanning electron microscopy. The results indicated that SFEE can be applied for the preparation of PCL nanoparticles without agglomeration and in a comparatively short duration of only 1 h

Biodiversity of sponges (Phylum: Porifera) off Tuticorin, India

The present study deals with 18 new records of sponges found at Kayalpatnam area and a checklist of sponges reported off Tuticorin in the Gulf of Mannar. The new records are Aiolochoria crassa, Axinella damicornis, Clathria (Clathria) prolifera, Clathrina sororcula, Clathrina sinusarabica, Clathrina coriacea, Cliona delitrix, Colospongia auris, Crella incrustans, Crambe crambe, Hyattella pertusa, Plakortis simplex, Petrosia (Petrosia) ficiformis, Phorbas plumosus, Spheciospongia vesparium, Spirastrella cunctatrix, Xestospongia muta and Sycon ciliatum. Details about the species diversity of common sponges, invasive sponges,massive sponges and boring sponges of the area are discussed and presented

Effect of Ethyl Ester L-Lysine Triisocyanate addition to produce reactive PLA/PCL bio-polyester blends for biomedical applications

This paper was accepted for publication in the journal Journal of the Mechanical Behavior of Biomedical Materials and the definitive published version is available at http://dx.doi.org/10.1016/j.jmbbm.2017.02.018We report in this paper the effects of Ethyl Ester L-Lysine Triisocyanate (LTI) on the physical-mechanical properties of Poly(lactide)/Poly(ε-caprolactone) (PLA/PCL) polyesters blends. The PLA/PCL ratios considered were 20/80, 50/50 and 80/20 (wt/wt %) and LTI was added in amounts of 0.0-0.5-1.0 phr. PLA and PCL reacted with LTI during processing in a Brabender twin screw internal mixer to produce block copolymers in-situ. The resulting blends have been characterized by torque measurements, uniaxial tensile tests, Differential Scanning Calorimeter, contact angle measurements with a Phosphate Buffered Saline (PBS) solution, ATR analysis and morphological SEM observations. Experimental results highlighted how LTI enhanced interaction and dispersion of the two components, resulting into a synergic effect in mechanical properties. Mechanical and physical properties can be tailored by changing the blend composition. The most noticeable trend was an increase in ductility of the mixed polymers. Besides, LTI decreased blend’s wet ability in PBS and lowered the starting of crystalline phase formation for both polymers, confirming an interaction among them. These reactive blends could find use as biomedical materials, e.g. absorbable suture threads or scaffolds for cellular growth

SUYAMBOOR, self-constructed city

Informal settlements are a natural and necessary part of urbanization. Occupied by victims of unsuccessful migration and viewed by the city dweller as a dystopia, these are incredibly self-sustaining parts of the city. Inhabited by the socially marginalised, informal settlements have been neglected in terms of infrastructure and public processes by the formal sectors. Recent efforts to deal with these settlements, like forced evictions, show evidence of social and spatial injustices inflicted on the inhabitants. By 2050, more than two-thirds of the global population will live in cities. Of those, one-third will live in sub-par informal settlements without their own right to the city. With this reality, is it time to reassess how we talk about informal forms of urbanization

Effect of Herbal Extract Treatment on the Moisture Management Properties of Cotton Knitted Fabrics

In this work, the moisture management properties of combination herbal extract treated cotton knitted fabrics were explored. The herbs namely wild turmeric (Curcuma aromatica Salisb.) and holy basil (Ocimum tenuiflorum L.) were used for the study. The pre-treated single jersey cotton knitted fabrics were given finishing treatment with 50%:50% combination herbal extract of wild turmeric and holy basil using pad-dry-cure method. The randomized response surface Box–Behnken design using quadratic model was used for the finishing treatment with process parameters such as combination herbal extract concentration of 1%, 2.5%, and 4%; crosslinking agent concentration of 3%, 5%, and 7%; curing temperature of 80°, 100°, and 120°. The analysis of variance results analysis using Design Expert software shows that the moisture management properties of the treated fabrics are influenced by the finishing process parameters. The study results revealed that the finishing treatment has altered the moisture management properties of the treated fabrics and resulted in excellent accumulative one way transport capability which increased their overall moisture management capability

Optimization of process parameters for minimum cutting temperature and surface roughness in turning of AISI 410 stainless steel impeller

In the present scenario of work, an investigation of experiment on CNC turning of AISI 410 stainless steel impeller has been brought into presentation. Turning parameters such as cutting speed (Cs), feed rate (Fr) and depth of cut (Dc) are taken into investigation and thus modeled for performance characteristics like cutting temperature (Ct) and surface roughness (Ra). The desirability function (Df) is employed in order to optimize the multi performance characteristics. In correspondence to the highest desirability, Cs: 80 m/min, Fr: 0.12 mm/rev and Dc: 0.59 are considered to be the optimal combination of process parameters. In result of Scanning electron microscopy (SEM), it denotes that the formation relating surface defect on AISI 410 are deposition of tool material particles, scratches and feed marks

Optimal corrosive behaviour on the weldment of AA6063 aluminum alloy by tungsten inert gas (TIG) welding process with backing plates

Pertaining on the present work on improving the corrosion resistance of AA 6063 aluminum alloy is found to weld with many backing plate materials like stainless steel, copper, marble and brass in accordance to the welding process that inherits itself with TIG. Utilizing the Orthogonal array L16, experiments were carried out. The corrosion resistance was improved by optimizing the pulsed TIG welding process parameters like current (A), gas flow rate (B), backing material (C) and backing thickness (D) using Genetic Algorithm (GA). Results proved that the GA shows a better corrosion resistance rate that was obtained to about 0,0408 mm/year with the backing material as copper