Tribological study of Aluminum

1. N I T R
Tribological study of Aluminum
CR-4102 TRIBOLOGY OF MATERIALS
P r e s e n t e d b y
J a d h a v S h i s h u p a l ( 1 1 8 C R 0 1 3 7 )
Course Mentor : Prof. Debasish Sarkar
Department of Ceramic Engineering

2. Lubrication
Friction
Wear
Tribology
Tribology is concerned with the friction,
wear, and lubrication of two interacting
surfaces in relative motion, as well as
the topic and practise of tribology.
What is Tribology
Tribology is formed from the Greek
term "TRIBO," which means
"rubbing," and "logy," which
means "study."

3. PROPERTIES OF ALUMINIUM
ADD TITLE
Low Density
Aluminium has a low density,
making it light and simple to
transport. As a result, it is the
chosen metal for aircraft
construction. The material is
both lightweight and sturdy, as
well aseasy to mould, making it
an excellent choice for
manufacturing.
Corrosion Resistance
Aluminum has a strong attraction
to oxygen. When a fresh metal
surface is exposed to air or any
other oxidising source, a thin, hard
coating of aluminium oxide forms
fast (or hydrated oxide in non-
stagnant water). This oxidation of
aluminium is what gives it its
corrosion resistance.
High Strength
Alloy 5052 is the highest-
strength alloy among the
non-heat-treatable alloys.
Low Cost
Aluminum is the most
plentiful metal on the
planet, as well as one of the
most affordable. However, it
was once more precious
than gold.

4. High Strength 5052
Aluminum sheet for river
boat
Aluminium
Round
Corrosion
Resistance
(Aluminum
pipe)
Aluminum
low cost
Aluminum
Die
castings

5. WEAR OF ALUMINUM ALLOYS
ABRASIVE WEAR
When a hard, rough surface glides across a softer
surface, abrasive wear develops. In this situation,
wear is defined as damage to a solid surface
caused by relative motion between that surface
and a contacting substance or substances, which
often entails increasing material loss.
ADHESIVE WEAR
Adhesive wear is a phenomena that
happens when two metals scrape against
each other with enough energy to
remove material from the less wear-
resistant side.

6. FATIGUE WEAR
Fatigue wear is a form of wear that requires several
cycles to develop debris. The fatigue process in metals
can result in the formation of surface and subsurface
fissures, which can lead to significant damage, such as
massive pieces leaving the surface, after a certain
number of cycles.
CORROSIVE WEAR
When wear occurs in a corrosive
environment, corrosive wear is defined
as the damage caused by the synergistic
attack of wear and corrosion. Tribo-
corrosion also refers to corrosive wear in
the literature.

7. Wear Mechanism of Aluminium Alloys
The machining of aluminium is required to use it in its final form, and
in order to do so, there must be a physical contact between the tool
and the work piece, and whenever there is a physical contact
between the work piece and the tool, the wear property arises.
Aluminium is utilised as an alloy in many forms, and the machining of
these alloys leads to the formation of wear.Sliding wear, rolling wear,
impact wear, fretting wear, and slurry wear are all examples of
different types of wear that occur when two surfaces come into
contact.

8. When the material deforms, there are two classifications:
Plastic contact and abrasive contact. The second form of
wear is elastic wear, which is characterised by two types of
wear: fatigue and corrosive wear.
If we look at wear from a mechanical standpoint, we can
divide it into three categories: mechanical wear, thermal
wear, and tribo-chemical wear. Adhesive wear, abrasive wear,
and fatigue wear are all types of mechanical wear. When we
talk about thermal wear, we're talking about wear generated
by frictional heat.
Wear caused by oxidation and wear caused by diffusion are
two types of tribological wear.

9. Physical separation, moulting wear, and chemical
dissolution are the three types of wear. When
repeated contacts are present, there is another sort
of wear that predominates.
The curve illustrated in picture 1 best represents
these contacts. The wear volume is related to the
sliding distance or the number of cycles in type 1
wear. As a result, the rate of wear remains constant
throughout the operation. Type 2 wear depicts the
transition from a high rate of wear to a consistent
rate of wear at a low rate. The next form of wear is a
quick transition from a low to a high wear rate zone.
Figure 1 illustrates this point.

10. The roughness curve is shown in the figure,
with Type 1 showing steady wear in which the
roughness values do not change and Type 2
showing steady wear in which the values first
increase to a certain value and then stay
there. The third type of value is one in which
the value lowers to a specific value and
remains there. Figure 2 clearly illustrates this
point.v

11. Abrasive wear, adhesive wear, fatigue wear, and corrosive
wear are the four primary wear predominates for aluminium
alloys that will be explored. Adhesive and abrasive wear are
two types of wear that occur when plastics come into
contact.
The contact interface has adhesive bonding strength in the
event of plastic contact between comparable materials.When
a fracture is thought to be primarily caused by strong
adhesion at the contact surface, the resulting wear is referred
to as adhesive wear, regardless of the fracture mode.

12. The ensuing wear is known as abrasive wear when the fracture is
assumed to be caused by micro-cutting by the indented substance.
After multiple friction cycles, fatigue fracture occurs in the event of
contact in the running-in condition.
Exhaustion wear is the term used to describe the wear that occurs
when a surface fails due to fatigue. The tribochemical reaction at the
contact interface is accelerated when it comes into touch with
corrosive media. Corrosive wear is the consequence of a
tribochemical reaction in corrosive media that is intended to be
brought about by material removal.

13. CONCLUSION
1. Aluminum is the most useful metal with advantageous
properties, it can be concluded.
2. The majority of aluminium alloys are prone to wear.
3. Wear can be classified in a variety of ways.
4. There are four types of wear that occur in aluminium
alloys: abrasive wear, adhesive wear, fatigue wear, and
corrosion wear.
5. In most circumstances, wear is proportional to the load
applied and the sliding speed.

14. K
H A N
T
U
O
Y