Assignment: Locate relevant information and submit a research review report for BOTH of the two...

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Assignment: Locate relevant information and submit a research review report for BOTH of the two applications below that contain the following information: • Describe the application and identify ALL of the key mechanical property requirements of the material in the application? • What are the important failure mechanisms that MUST be considered in material selection for this application? • Choose three different commonly used materials for this application and describe the EXACT composition and microstructure of each material (to do this you will need to choose a specific grade of each commonly used material). • Explain how the microstructure of your three commonly used material grades gives the necessary properties to meet the key mechanical property requirements that you identified. • Describe one example of a surface engineering approach (coating or treatment) used in this application to improve the properties or assist in preventing failure. • Identify one NEW material using scientific journal literature that is not widely used at present for this application, but is currently being researched for such. Describe the microstructure of the material and clearly explain why it may potentially be an improvement over current materials.
	
Document Preview: Assignment 2 – SEM XXXXXXXXXXTotal assessment weighting - 20% 
Due Date: 
th
Thursday 16 May 2013 
th
Thursday 13 June 2013 
Assignments should be uploaded either as word docs or pdf’s to the appropriate dropbox on DSO. 
 
Note: There are two assignment submission dates, with the first part of the assignment due in week 
4 so that students can get feedback in time before submission of the second part. 
Many technological developments depend on advancements in materials research.  This is 
particularly the case in applications that require materials to withstand increasingly higher loads and 
temperatures.  For instance the speeds of aircraft are often limited by the creep resistance of 
materials used for the turbine blades in the engines.  While there are many handbooks and 
databases available that contain descriptions and properties of commonly used materials, there are 
many newly developed materials that are only contained in research literature.  It is important for 
engineers working in leading edge applications to keep on top of current research to determine 
whether there are any developments they can exploit.  
Assignment: Locate relevant information and submit a research review report for BOTH of the two 
applications below that contain the following information: 
• Describe the application and identify ALL of the key mechanical property requirements of 
the material in the application? 
• What are the important failure mechanisms that MUST be considered in material selection 
for this application? 
• Choose three different commonly used materials for this application and describe the EXACT 
composition and microstructure of each material (to do this you will need to choose a 
specific grade of each commonly used material). 
• Explain how the microstructure of your three commonly used material grades gives the 
necessary properties to meet the key mechanical property requirements that you identified. 
• Describe one example of a surface engineering...

David · Accepted Answer

Vehicle Armour material selection
1. Mechanical property of material used in vehicle armour
Hardness –  
Material used in vehicle armour should have good hardness as these are used in that 
area where security is main objective. 
Normally vehicle armour material hardness depends on the grades and these are as 
listed below
Grade of material  Hardness in HB  Thickness in mm  
380 320-370 6-25 
400 360-420 5-40 
450 420-480 5-40 
500 480-540 2.5-40 
500T 480-540 2.5-40
Other mechanical properties we may secure in following table  
Grade of material  Yield strength  
(M Pa) 
Tensile 
strength  
(M Pa) 
Elongation  
A5% 
Impact 
strength  
Hardness  
BHN 
380 800 1000 12 40 320-370 
400 1000 1250 10 35 360-420 
450 1200 1450 8 30 420-480 
500 1250 1600 8 20 480-540 
500T 1250 1600 8 20 480-540
2. Failure mechanism that should be considered during the selection of the 
material for this application
As we know that armour material will be used where there will be impact loading 
situation, we have to focus on relationship between microstructure parameters and 
strength properties of material. 
As we know that controlling of hard material occur normally due to state of interfaces 
& process that take place on micro level, hence the best way of inspecting the 
composition of failure is local auger electron spectroscopy. 
In this process we have to inspect the effect of heat treatment on the failure 
mechanism of armour materials.

Assignment: Locate relevant information and submit a research review report for BOTH of the two applications below that contain the following information: • Describe the application and identify ALL...

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