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Fused deposition Modeling (FDM) is one of the 3D techniques which are mainly used to fabricate the three-dimensional object directly and it is more economical method. The objective of this investigation is to primarily fabricate as-build and annealed polymer associated composites of carbon fiber Polyethylene Terephthalate Glycol (CF-PETG) material by FDM with the effect of different raster angle and layer thickness were consider as the prime parameters. The test specimen was prepared by FDM process with different raster angle (00/900, -450, +450, -450/+450) and layer thickness (100, 400 microns) with other parameters were kept constant. The study of the mechanical properties such as hardness, tensile and impact test of the as-built and annealed CF-PETG were investigated. The best results obtained for annealed specimens printed with raster angle of 00/900 and layer thickness of 100 microns produced more influence in all the mechanical properties.

This research paper affords the practical investigation of the fabrication of eco based composites. The banana fiber is used as primary and powdered coconut shell is utilized as secondary reinforcements with epoxy resin to structure hybrid composite samples. The fiber weight proportion was kept as constant and the powder weight proportion was varied with five different proportions. Composite laminates were made-up by hand lay-up technique and tailed by compression moulding process. The manufactured composites had been examined as per the standards of ASTM to estimate the mechanical behaviors such as flexural, tensile and impact strengths. The results of the tests show that under mechanical loads, the hybrid composite with coconut shell powder outperforms the unfilled fiber reinforced composite

In order to investigate the possible use of normal capital, we have tried by hand to manufacturing sisal fibre polymer composites. Natural fibre composites are reusable, low-cost and biodegradable. Simple source, lesser compactness, superior basic property, lower quality, acceptable physical and mechanical properties, non-acidic in the environment, make them a good-looking biological substitute for glass, carbon or other artificial fibres. The outcome of SiC on the physical and mechanical properties of organic sisal composite materials is studied in this work. The composite was manufactured with and devoid of SiC, mixing natural sisal fibre with polyester as a reinforcement medium. The investigational results showed that the tensile force of the mixture with 12 % SiC was 2.52 times better than that of the composite devoid of SiC. The collision strength of the 12% SiC merged is 1.72 times higher than that of the SiC pure polyester composite.

The dependence on bio-friendly composite has triggered researchers to explore several natural lignocellulose fibers. The promising properties of the fibers resulted in natural fibrils to be used as sustainable alternate for artificial man-made fibrils. The present work deals with exploration of physio-mechanical and chemical characteristics of coconut inflorescence fibers. The coconut inflorescence fibers are extracted by the process of retting and then the fibers are subjected to surface modification with KOH. The amorphous constituents present in the fibers were eroded and significant improvements in properties of the fibers were observed. XRD and FTIR analysis confirmed the removal of functional groups and crystallinity improvement were also confirmed. Single fiber tensile test confronted the improvement in tensile nature of the fibrils. Increase in fiber diameter was also observed as a result of surface modifications done on the fiber surfaces.

Friction stir processing (FSP) is a typical process for refinement changes of microstructure, enhance material's mechanical properties, and fabricating surface layer composites. The cast A356 surface composites were fabricated via Friction Stir Processing (FSP) and the enhancement of it’s metallurgical and mechanical properties are studied and conveyed in this research study. The three combinations of test samples of FSP'ed cast A356 alloy, FSP'ed cast A356 FSP with tungsten nanoparticle addition (5 and 10 vol%) were considered to fabrication under fixed parametric conditions like tool rotational speed of 1000 rpm, a load acting 9 kN,./ tool travel speed of 20 mm min−1 through four number of tool travel passes respectively. Obtained FSP'ed samples were exposed to microstructural, tensile strength tests and fracture surface morphology analysis were carried out to record the responses.

AA2014 Aluminum alloys are most widely used for automobile and aerospace structures where specific strength is important. Hot cracking is a major problem while welding these alloys. In the present investigation, the metallurgical studies, viz, hot cracking sensitivity, microstructure and the mechanical properties, viz, hardness and tensile strength of the 4 mm thickness AA2014 aluminum alloy were studied using two different methods. The first method involves TIG (Tungsten Inert Gas) welding with continuous current process and the second method involves TIG welding with pulsed current process. In both the process commercial argon pure gas was used as a shielding gas. The results showed that hot cracking sensitivity was decreased when the specimen was welded using pulsed current process compared to continuous current process.

Natural fibers have been increasingly used in polymer composites during the last decade, and this has a significant impact on environmental implications. Natural fibers from lignocellulose materials have recently emerged in the form of fabric woven reinforced in polymer composites due to numerous applications, including structural and non-structural variants. One of the most promising materials for substituting synthetic polymeric materials by naturally available fiber reinforcements in polymer composites is woven fabric. Bamboo/Bamboo woven fabric encompasses bamboo yarn in both the warp and weft directions was chosen for this study. Bamboo/bamboo twill woven fabric acting as a reinforcement in the composites with epoxy resin as a bonding material using the compression moulding method of manufacturing.

Solution route precipitation technique was opted to synthesize the nanostructured copper tungstate by the incorporation of cupric ion solution to the aqueous sodium tungstate reagent. The size and surface of the synthesized nanostructured material is highly influenced by the concentration of cuprous ion as well as the tungstate solution. The structural pattern and chemical composition of CuWO4 nanoparticles were analysed by powder XRD and FESEM with EDX spectrum. The powder XRD and EDX pattern confirmed the elemental composition of the synthesized samples. FESEM images indicated that the particle was present in random size distribution. At 298 K, water vapour pressure thermostat was achieved in the range from 5% to 98% as a relative humidity (RH). By providing the DC conductance measurement as a relative humidity, the humidity sensing nature of the material was investigated and the sensitivity factor (Sf) value of the prepared CuWO4 was calculated at 298K (Sf=9640±100).

Pure aluminium alloy (AA) components are not extending their cyclic life due to soft nature of the surfaces for most of the automotive structural parts, exposed to various loading and stress exposed areas through various surface property enhancement techniques. Among all the technique friction stir processing (FSP) followed by shot peening (SP) technique is the most viable and cost-effective process for enhancement of component performance and SP removing residual stresses on the samples thereby improving surface strength. The main objective of the proposed work was cast A356 alloy reinforced with nano form of 6wt% silicon carbide (SiC) harder particles and 3wt% self-lubricant graphene (Gr) was used to fabricated a surface nano hybrid composite through FSP technique. SP route was performed on the FSP-ed samples with optimal parametric conditions for obtaining improved mechanical performances.