Ajit Behera

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Most maintenance practitioners have become familiar with machine condition monitoring through the use of portable systems such as vibration, oil analysis, thermography. These portable systems are typically utilized as part of predictive maintenance program that is expensive and time consuming. With recent advances in the field of lubricant condition monitoring utilize the concept of real time condition monitoring with the help of expert systems that is highlighted through a case study. The present work describes the development of an expert system that can be used to determine the condition of lubricating oil in circulation in a centralized lubrication system attributed for lubricating antifriction bearings. It begins with basic concepts of oil analysis, lubrication, with analysis of bearings and finally the development of an expert system pertinent to wear paricle analysis. The lubricant contaminant monitoring through advanced diagnostic techniques for critical equipment is a very powerful maintenance tool in any production plant. It predicts the condition of the oil as well as the machine in advance failure mode.

Coefficient of friction and wear rate of different austenitic steel materials are investigated and compared. Experiments are conducted on a pin/ball-on-disk apparatus on different types of ball materials such as austenitic stainless steel SS304 and austenitic stainless steel SS316 sliding against EN-31 disk. The experiments are performed on a group of specimens for duration of 5 min for various loads of 10,15 and 20 N in magnitude with sliding velocity of 1,1.5,2 m/s. The results show that the frictional force varies with duration of rubbing, normal load and sliding velocity. In general, frictional force increases for a certain duration of rubbing and after that it remains constant for the rest of the experimental time. The results obtained reveal that the frictional force increases with the increase in normal load for all the tested materials. It is also found that frictional force increases with the increase in sliding velocity for all the materials investigated. For the same operating condition, the magnitudes of the frictional force and wear rate are different for different materials depending on normal load and sliding velocity.

The content of the book is as follows: Coating and Different Types of Deposition/Coating Techniques. Compressed summary about the electrodeposition process with advantages, disadvantages and their applications over other coating methods with diagram. Also provide a short explanation on pulsed electrodeposition, electrocodeposition, different baths used for nickel electroplating. Brief literature reviews on pure Ni and Ni-Al composite coatings were arranged in chapter 2. A detailed experimental investigation and about different characterization methods were provided in chapter 3. In chapter 4 a discussion about the results obtained from the experiment. In chapter 5 conclusions of the present work were reported and provided with future work. References were provided in the last chapter.

In day to day life, human life cannot progress without the help of materials. From the ancient periods to the modern age, humans showed much importance to the materials and their production. As technology progressed, more and more new types of materials were found to optimize and improve the machines or tools. Many alloys and material forming techniques were invented to ease the processes or manufacturing. There are many materials which have their specific properties like hardness, toughness, machinability, weld-ability etc. One of the materials are called as "Smart materials". The term smart has been used in significance of their ability to respond according to the temperature. These materials change their shape into trained shape when temperature is raised to the trained temperature. These smart alloys are also called as "shape memory alloys". The application of Ni-Ti alloys was restricted to actuators, pseudo-electric parts and biomedical instruments. So, as the Ni-Ti alloys have good mechanical properties and reliable shape memory ability, this alloy is used to make a thermal encoded security lock. Design of thermal encoding system is made.

Shape memory alloy has wide range of application in aerospace, medical, actuator, sensor and in biomedical due to its property of superelasticity and shape memory effect. From long time for high precision parts cold treatment is being used for the enhancement of their property. When the cold treatment is done temperature down to -80 C, it is known as cryogenic treatment. And if the cold treatment is done at liquid nitrogen temperature (-196 C), called as deep cryogenic treatment. There are plenty of literature that report the cryogenic treatment of different kinds of steel, ZnO nanowire and pure Zr. But unfortunately there are very rare literature on the cryogenic treatment of Nickel-Titanium shape memory alloy. The precise effect of cryogenic on properties like corrosion and hardness is not clear. Therefore, in this present book we have studied, mechanical properties, morphology as well as the corrosion behaviour of NiTi shape memory alloy. For the Cryotreatment test all the four sample of NiTi was kept inside liquid nitrogen for 6, 12, 24 and 48 hrs. A detailed microstructural analysis of non cryotreated and cryotreated NiTi alloy has been done. XRD and SEM were also carried.