VEHICLE ARMOUR MATERIAL

Let us understand the material for vehicle armour in this post; we will come to know the complete concept behind the selection of material for vehicle armour after reading this post. 

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

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 micro-structure 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.

During the selection of material for this application we also consider the failure criteria such as Rankine criteria.

Commonly used materials

1. Steel – steel is the best material to use as armour material as steel has good hardness and properties of ballistic protection.
2. Aluminum- Aluminum is alos used for armour material but when there is restriction of light weight.
3. Uranium – uranium posses high density so it may be used in armour.

Let us move towards next post............

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