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
Find out the modulus of elasticity: A unidirectional FRP is produced with fibre volume ratio of 60%. The density of fibre is 1480 kg/m 3 and that of matrix is 1200 kg/m 3 . C
what is bending strength machine parts of bending strength machine and description about different parts of bending strength machine description about bending srength machine and
Q. Design Storage compounds for bulk solids? Storage compounds for bulk solids, liquids and liquefied gases are normally included in a plant layout to provide short term storag
Evolution of Specific volume of wet saturated steam -thermodynamics : Specific volume of wet saturated steam (V we t ) It is volume occupied by unit mass of wet satu
Vacuum Or Vacuum pressure (P vacc ) It is the pressure of a fluid that is always less as compared to the atmospheric pressure. Pressure (that is vacuum) in a steam condenser is
Determine the Properties of foundation Soil profile together with natural type and properties of each strata will have a bearing on the choice of foundation. The fact that loa
This project involves a test of the basic idea behind the bootstrap method. Essentially you will write a program that: 1. Generates a parent population of size 100,000 whose dis
what is fluid?
Q. W rite down the basic formula for maximum bending moment in some ideal cases. Sol.: Ber m together with nature of load Maximu
IGES application protocol: In the year 1977, the three authors of The Initial Graphics Exchange Specification were identified collectively for their contributions to the growt
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