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Laser Welding Applications with Low Power
For a lap weld joining of AISI 416 stainless steel cap to a AISI 310 stainless steel body, CO2 Laser with a 575 watts beam out put was used associated with a 127 mm focal length lens and a helium gas shield. An enhanced pulse mode, 100 pulses per second, with 4 milli second pulses was used to achieve penetration of 1.65 mm at welding speed of 762 mm per minute. Power was ramped down towards the end of the weld to prevent possible fracturing due to rapid cooling. There is very little debris or spatter in the vicinity and it fulfilled the requirement for a cosmetic as well as a deep penetrating weld. The power levels in this category is less than 1 kW of laser power output.
Homogeneous and isotropic material: A homogeneous material implies that elastic properties like modulus of elasticity and Poisson's ratio of material are same everywhere in
a) The voltage v across a capacitor at time t seconds is given by the following table t: 0 2 4 6 8 v: 150 63 28 12 5.6 Use the method of least square to fit a curve of
Q. Standard for steel pipes? Vendor shall meet or exceed the requirements of the latest edition of the following codes, regulations, and standards except as superseded herein.
Static Friction: When applied force is less than limiting friction, body remains at rest and this type of frictional force is called as static friction and this law is called as l
how to solve bending moment equation
Defects Involving Inadequate Bonding Lack of fusion Involves lack of complete melting and fusion of some portion of the weld metal in a joint. It may occur either bet
STRESS ANALYSIS
(a) Classify the two wheeler engines. (b) Define the following components and their uses in engine with the help of engine diagram. (i) Crankcase (ii) Piston and Piston pi
An unsymmetrical I-Section as shown in figure below. If maximum bending stress is not extend more than 40MPa in the section than find out the moment which it can bear
Petrol: Work in a well-ventilated area. Keep flames or sparks away from the work area or where petrol is stored.
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