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Cobalt-base super alloys (e.g. UNS R30155 (Grade 661) and R30816 (Grade 671)) have superior strength to the nickel base alloys above 1800°F (980°C).
The refractory metal alloys (including tantalum, tungsten, niobium, and molybdenum) are not typically used in high temperature applications, except as alloying elements. They are commercially available, but are often used in environmentally protected applications. Minor additions of niobium and molybdenum to stainless steels and nickel-base alloys typically enhance high temperature properties.
Explain how chips are prepared in cutting and how are they classified with sketches. What are the factors responsible for creation of different forms of chips?
Loose piece pattern This type of pattern is also used when the contour of the part is such that withdrawing the pattern from the mould is not possible. Hence during moulding th
Borides Borides of Mo, W, Cr, Ti and Zr find extensive industrial application. They exhibit extremely high hardness, melting point from 1800 to 3000 o C and good chemical resi
Q. Basic type of Polymer? Polymer can be divided into three broad divisions: plastics, fibers, and elastomers. Synthetic resins are usually referred to as plastics. Plastic der
Field winding Every pole core has one or more ?eld windings provided on it to make a magnetic ?eld. Whenever they carry current, they electromagnetic the poles which pro
Battery Charger: As suggested by the name, it is used to charge a battery. The detailed procedure for charging a battery is given in later units. List the uses of following too
Determine the stresses in the shell: A cylindrical boiler is 2.5 m in diameter and 20 mm in thickness and it carries steam at a pressure of 1.0 N/mm2. Determine the stresses i
Q. Design Equipment Rooms for plant? Equipment for important safety systems and controls shall be located such that they can remain operational during the defined accidental ev
Duty cycle The concept of duty cycle is to be clearly understood before operating any machine. Unlike the arc welding power sources, the resistance welding power sources are de
In motorcycle servicing we studied about various service tips for motorcycle servicing. These steps will ensure proper servicing of motorcycle and as a result customers will trust
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