Cold spray process (CSP) is a thermal spray technology in which coating (10–40 µm) is formed in the solid state by the impingement of power particles with supersonic velocity (200–1,200 m/s2) on coupon employing compressed gas jet, below the melting point of coating powder. It is commonly referred as cold gas dynamic spray, high velocity powder deposition, kinetic spray and kinetic energy metallisation process. Using CSP, various engineering materials (metals, polymers and ceramics) and its composites can be deposited. It is unique and promising approach for obtaining surface coating and offers various technological benefits over thermal spray as kinetic energy is employed for deposition rather than thermal energy. This offers great benefits in additive manufacturing (AM) to develop a component denser, low oxide coating free of tensile residual stresses, and undesired chemical reactions compared to conventional AM and coating techniques. Cold spray additive manufacturing (CSAM) is the powerful and emerging technique in the field of AM to develop engineering components with improved performance covering broad range of functionalities of surface, subsurface and interfaces. There are few flaws in this technique; however, extensive research work is going in CSAM and repairing of components to meet the real-time applications. The main objective of this review article is to summarise the history, effect of process parameters on surface coating, research and development in CSP along with its implementation in AM, component repairing and biomedical, antimicrobial and electrical applications. A discussion on future trends in CSAM is also provided at the end part of this article.

The evolution of modern industry tends to use aluminium based alloys due to its low density and high hardness. While machining aluminium, one of the major failure modes of cutting tool is the material being machined adheres to the tool cutting edge. This leads to poor surface quality characteristics. Tough different tool materials and tool coatings are available, achieving better machining parameter is still under research. Hence, in this work, Al 7075 is machined using CNC lathe under dry and with the nano lubricant of Al 2 O 3 of 5%. The turning experiments were carried out in Siemens-CNC lathe to investigate the best operating conditions. There are 27 experiments based on full factorial approach is performed. The machining parameters are speed, feed and depth of cut. The output parameters are metal removal rate (MRR) and surface roughness (SR). The regression models developed from ANOVA are significant. To find best operating parameter TOPSIS is performed under each machining conditions. From the test results, it is concluded that the 1% of Al 2 O 3 nano lubrication gives better value of both MRR and SR.

In PHA India private limited fuel tank door relief handle lever (hdl) assembly part has more quality issue, also customer complaint periodically due to clip is mounted by hammering with hand. Due to above-stated condition, the part has the following problem in pha.india.private limited as well as from our customer end. (Hyundai.motor India ltd)• Clip bracket improper seating with matching part.• Release mechanism not properly operated.• Clip bracket breaks often if more force applied.• Clip bracket comes out if less force applied.• UPH very less. (unit per hour)• Operator fatigue increased.• It leads to hand injury.

Cleaning of large area like office, hospital, airport, railways require more number of laborers to do the work and also time also too high to clean the spaces. Due to which the workers also suffered due to the dust adsorbed during cleaning process. The smart floor cleaning is a solution for to cover the large area floor cleaning with smarter solution. The floor cleaner has scrubber pad, fan, liquid container. The machine has designed to process the step by step cleaning process which cleanses maximum area when compared to workers. The coverage area was 0.543m 3 /min as measured with the fabricated cleaner. The machine has fan which has the ability to dry the floor instantly after scrubber with liquid. The smart alternate for removing dust and covering large area was designed and is proved that is able to cover the surface area which is 3.75% greater than the workers who are involved in this work.

Influence of surface roughness on coefficient of friction of Titanium coated R19 Steel is investigated in this paper using Pin on Disc Apparatus. Wear properties of R19 Steel are evaluated because it is widely used in making the rail wheel and rail roads over the years. Titanium coating of 100nm thickness was deposited on the R19 Steel by Electron Beam Gun Physical Vapor Deposition method. Wear and friction parameters were evaluated using Pin on Disc apparatus. The Surface morphology plays an important role in affecting the wear rate. Non-contact surface roughness tester was used to examine the surface texture and measure the surface roughness of the specimens. The test was carried out in a pin on disc apparatus for Normal Load of 15N, Sliding Velocity of 3m/s and Time 5 min. The texture and the roughness parameters of the surface affect the coefficient of friction. The experimental values of roughness parameters of uncoated and coated disc and its effect on coefficient of friction are compared and validated. Results show that the Coefficient of friction decreases with lower value of Ra. Lower values of frictional force and coefficient of friction results in lower wear rates.