Already have an account? Get multiple benefits of using own account!
Login in your account..!
Remember me
Don't have an account? Create your account in less than a minutes,
Forgot password? how can I recover my password now!
Enter right registered email to receive password!
Magnesium And Its Alloys
Magnesium is a light metal along with density of 1.74 g/cm3. Magnesium is more costly than aluminium as density 2.74 g/cm3 along with which it compares for lightness. Magnesium in its molten state burns readily, thus it is complicated to cast the alloys of magnesium. Magnesium alloys contain low corrosion resistance and presents poor creep and fatigue behaviour. Their h.c. p. structure does not allow deforming readily at room temperature as only three slip systems exist in h. c. p. at room temperature. The best benefit that magnesium alloys offer is such of low density and a lot of aircraft parts are made in these alloys.
Al while added to Mg in the range of 3 to 10% along with minute amounts of Zink and Mn raises strength, castability and hardness. Addition of Mn as 1.2% along with small amount of C does not raises strength but enhances corrosion resistance. Mg-Al-Zink alloys contain good corrosion resistance and mechanical strength. Such alloys are good casting material and usually used at high temperature like 250oC. Extrusions and forgings for normal purpose are made in such alloys are utilized in aircraft, radio, instrument and automotive industries.
Several magnesium alloys are illustrated in Table no.21 with their applications.
Table no.21: Magnesium Alloys
Composition (% )
Condition
UTS N/mm2
YS N/mm2
Elongation
%
Application
Wrought alloys
Mg, 3 Al, 1 Zn, 0.2 Mn
Annealed
228
-
11
Air borne cargo equipment
Mg, 2 Th, 0.8 Mn
T8
198
6
Missile and aircraft sheets upto 427oC
Mg, 6 Zn, 0.5 Zr
T5
310
235
5
Highly stressed aerospace uses, extrusions, forgings
Cast alloys
MG, 6 Zn, 3 Al, 0.15
Mn
As-cast
179
76
4
Sand casting requiring good room temperature strength
Mg, 3 Re, 3 Zn, 0.7 Zr
T6
138
110
97
3
2
Pressure tight and permanent mould castings used at
150-260oC
Pole: this is the centre of finite rotation of the coupler. Relative Pole: this is the pole of coupler associated to other moving link. Accuracy Points: The points at w
I need rewording
Explain the Newer Machining Processes In recent years a number of new material have been developed which are being commonly used in space research missiles and nuclear indu
Explain Function Phase of Hydrostatic sensor paver machine To identify the functions. To identify the functions regarding to the problem in paver machine. Our project focu
why the pressure will reduce when the velocity increases
Capacitor Discharge Welding This is used for welding of studs, welding of thermocouples, etc. on the base metal. A low voltage, high amperage electrical discharge from a capac
Takt Time for sand blasting: Tatk time is crucial in manufacturing process. It determines the speed of production to produce a product. Time is money toward prod
#question calculate bending force
Initial structure and requirements: In the evening after the panel, various interested parties gathered in a smoke-filled room and asked themselves if a common translator was
Describe carburetion. What are the basic different air-fuel mixture on which an engine can be operated ? Write a short note on sterling cycle. In an engine working on inlet pres
Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!
whatsapp: +91-977-207-8620
Phone: +91-977-207-8620
Email: [email protected]
All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd