Electron beam welding

with the welding industry. It is also known as hydrogen induced cracking, (HIC); hydrogen assisted cracking, (HAC); cold cracking,(CC); delayed cracking, (DC); under-bead cracking, (UBC); and hydrogen embrittlement, (HE). HISTORY Hydrogen cracking of welds first became a major concern during the first part of the 20th century. Up until that time welding was experimented with, but not used in normal production. A few transmission pipelines were built using gas welding and arc welding was being

Introduction of Plasma: What is plasma? Plasma is a hot ionized gas consisting of approximately equal numbers of positively charged ions and negatively charged electrons. Figure: Plasma globe (courtesy: Martin Koppe) Classification of plasma: Figure: Classification of Plasma What is Cold Plasma? Cold plasmas are those with Te >> Tgas. It is obtained in low pressure discharges or in short pulse discharges as Dielectric Barrier Discharges or ns discharges. What is Hot Plasma

Characterisation of Metabolically Active yet Non-culturable Cells (MAyNC) Project Report,BIOT- 685 Directed Studies under Dr.Pillai   Abstract eBeam technology uses high energy electrons produced from the commercial electricity by linear accelerators for applications in various fields such as food irradiation, vaccine development, wastewater treatment, biopolymers, therapeutics, etc. The objective of the project was to study the inactivation kinetics

the microstructural behavior of weldmetal [2]. It is well established that alloying elements such as Ti, Ni, B, Mo, Cr etc play an important role for microstructural development [3]. Therefore, it is very essential to manipulate the composition of welding consumables for the optimum joint properties. Previous researchers have used various procedures to manipulate weld metal composition. Two major approaches for improving the WM properties are to use of different types of flux and another one is to

interaction between a beam of coherent light which has a high power density and the desired surface within a specified atmosphere. Light is generated in a resonator and directed at the surface of the sample. During the movement of the laser beam over the work piece, a track pattern is created at the surface. Based on the desired process and the geometry of the work piece, the system can be automated or designed to be controlled by robots. Fig. 2 Laser beam treatment 2.3 Types

spectrum. They can emit a single colour of light. Temporal coherence can be used to produce pulses of light. Laser has a number of applications. They are used in printers, barcode scanners, optical communication, laser surgery, skin treatment, cutting, welding materials, and laser lighting in entertainment2. When it comes to biomedical applications lasers are used in the tattoo removal, laser surgeries, diagnostic procedures, therapeutic uses, and as an adjuvant therapies in several disorders. Low Level

http://www.UandiStar.org JNT UNIVERSITY KAKINADA, KAKINADA MECHANICAL ENGINEERING - COURSE STRUCTURE – 2010 BATCH 1 2 3 4 5 6 7 8 9 I SEMESTER Engineering Mechanics Fluid Mechanics & Hydraulic Machinery Thermodynamics Managerial Economics & Financial Analysis Electrical & Electronics Engineering Computer aided Engineering Drawing lab Electrical & Electronics Engg. Lab Fluid Mechanics & Hydraulic Machinery Lab English Communication Practice P 4 4 4 4 4 6 3 3 2 II YEAR C II SEMESTER 4 1

Once you have a 3D model the next step is to prepare it in order to make it 3D printable. Preparing a 3D model to be 3D printed is called slicing. Slicing is dividing a 3D model into hundreds or thousands of horizontal layers. This is done with software. It can sometimes be done within a 3D modeling software application. Certain 3D printers require a certain slicing tool. Once the 3D modelTo begin 3D printing you first have to make a virtual design of the object that you want to create. The virtual

3D printing or additive manufacturing is a process of making three dimensional solid objects from a digital file. The creation of a 3D printed object is achieved using additive processes. In an additive process an object is created by laying down successive layers of material until the entire object is created. Each of these layers can be seen as a thinly sliced horizontal cross- section of the eventual object. It all starts with making a virtual design of the object you want to create

Lasers: What Everyone Should Know Lasers are very important tools in modern science, industry, and everyday life. From their creation over forty years ago their designs have improved and their usefulness increased. They work on physical principles that are a mix of both classical and quantum mechanical, thus making them great examples for demonstrating the properties of light and excited states of atoms and molecules. The process of producing laser light can be complicated, but the explanation