Air Jet Erosin

7/27/2019 Air Jet Erosin

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AIR JET EROSION STUDIES ON

AL6061 COMPOSITES

TEAM MEMBERS:-

KUMAR SAHEB (1PI10ME061)

MANOJ KUMAR RAJPUT

(1PI10ME065)

PROJECT GUIDE:-

Dr C.S RAMESH

(PROFESSOR,DEPARTMENT OF

MECHANICAL ENGINEERING,PESIT)


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AIM OF THE PROJECT:-

TO MINIMISE AND LOOK FOR A BETTER

SOLUTION TO AIR JET EROSIONPHENOMENON

BY DEVELOPMENT OF SUITABLE METALMATRIX COMPOSITE.


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WHERE IS AIR JET EROSION

COMMON ?

Some practical examples:-

It is very commonly seen that whena plane takes off or while landing ,

due to high velocity of the plane,

the sand particles hit the lower part

of the plane , leading to its erosion

with time.

In thermal power plants , with theproduction of byproduct , theres

also formation of fly ash . This fly

ash combined with high

temperature and velocity will erode

the exhaust tubes.

Military aircrafts operating indeserts areas are constantly in

contact of eroding sand particles

and sand dunes which destroys

and weaken its outer surface with

time.


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A eroded part of an aircraft due to air jet erosion


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WHAT IS AIR JET EROSION TEST ?

The Air Jet Erosion Test is used to test the erosion resistance of solid

materials to a stream of gas containing abrasive particulate.

The test is performed by propelling a stream of abrasive particulate gas

through a small nozzle of known orifice diameter toward the test sample.

Material loss, in this case, is achieved via the impingement of small abrasiveparticles upon the surface of the test sample.

Materials such as metals, ceramics, minerals, polymers, composites,

abrasives, and coatings can be tested with this instrument.

The test specimen, temperature, angle of incidence of the jet stream,

abrasive particulate speed and flux density, can be varied to best simulateactual conditions.

Special adapters are available to test various geometries and components for

user-specified testing applications. The instrument can be configured to test

as per ASTM G76 specifications


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Air Jet erosion test

Rig as per ASTM G76


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WHY HAVE WE CHOSEN

COMPOSITE ?

Many of our modern technology require material with unusual combination of

properties that cannot be met by conventional metal alloy, ceramics and

polymers .

This is especially true for material that are needed for aerospace ,under water ,

and transportation applications. For example , aircraft engineers areincreasingly searching for structural material that have low density , are strong ,

stiff and abrasion and impact resistant, and are not easily corroded .

Achieving this is relatively difficult task owing to the fact that strong material are

relatively dense and also with increasing stiffness , impact strength decreases .

A composite , in the present context , is a multiphase material that is artificiallymade , as apposed to one that occurs or forms naturally . In addition , the

constituent phases must be chemically dissimilar and separated by a distinct

interface. Thus most metallic alloy and many ceramics do not fit this definition

because their multiple phase are formed as a consequence of natural

phenomena.


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COMPOSITION OF AL6061

Component Amount (wt.%)Aluminium BalanceMagnesium 0.8-1.2Silicon 0.4 0.8Iron Max. 0.7Copper 0.15-0.40Zinc Max. 0.25Titanium Max. 0.15Manganese Max. 0.15Chromium 0.04-0.35Others 0.05

Aluminium alloy 6061 is one of the most extensively used of the 6000 seriesalumium alloys. It is a versatile heat treatable extruded alloy with medium tohigh strength capabilities.

Typical composition of aluminium alloy 6061


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KEY PROPERTIES OF AL6061

MEDIUM TO HIGH STRENGTH

GOOD TOUGHNESS

GOOD SURFACE FINISH

CORROSION RESISTANT

GOOD CORROSION RESISTANCE TO SEA WATER

CAN BE ANODIZED

GOOD WELDABILITY AND BRAZABILITY

GOOD WORKABILITY

WIDELY AVAILABLE


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HOW COMPOSITE CONSTITUENT WERE

SELECTED:-

Al 6061 is selected because of its good formabilitycharacteristics and previously mentioned key properties

CeO2 is corrosion resistant , hard and enhances grain

refinement

TiO2 is very hard material.


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METHODOLOGY AND

EXPECTED TIME PLAN:-1. EXTRUSION OF CAST AL6061-CEO2-TIO2 (1

MONTH )2. FORGING OF EXTRUDED MMCS (1/2

MONTH)

3. MICROSTRUCTURAL ANALYSIS ANDMICRO HARDNESS TEST (1/2 MONTH)

4.AIR JET EROSION TEST (1 MONTH)


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THANK

YOU

..

Air Jet Erosin

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