Residual Stress | Definition, Effect, Relief, Causes [Brief Guide]

What is residual stress? Stresses can the broadly classified into two parts. Load stresses Residual stresses Load stresses are those stresses which remain within elastic limits and are induced due to external forces. When these forces are removed these stresses also become zero. Load stresses can be easily calculated from the equations of strength of… Read More »

Hot and Cold Working Process of Metals | Advantages and Disadvantages

In this article we have discussed hot and cold working process of metals. First, we will discuss hot working and then we will discuss cold working of metals. But before moving to our main topics let us understand one important definition which would be very helpful to us later. What is recrystallisation temperature? The temperature… Read More »

Ceramics | Types, Applications, Properties, Advantages, Disadvantages

What are ceramics? The word ceramics is derived from the Greek word keramos which means ‘potter’s clay’. However, many compounds which are classified as ceramics today contain no clay. Modern Ceramics can be defined as the compounds of metals and non-metals. They generally have ionic atomic bonding between them. Traditional ceramics include insulating materials, glass, refractories,… Read More »

Heat Treatment | Definition and Types with Explanation

What is heat treatment? Heat treatment process is the controlled heating or cooling of plain carbon steel or alloy steel. Heat treatment of steel is used to change its structure in order to obtain certain mechanical properties. These mechanical properties could be hardness, strength or ductility. Note: For heat treatment there should be some quantity… Read More »

Flywheel | Types, Functions, Advantages, Limitations, Uses [Full Guide]

What is flywheel? A flywheel is a heavy rotating body which acts as a reservoir of energy. It acts as a bank of energy between the energy source and machinery. Energy stored in a flywheel is in the form of kinetic energy. Image URL:, Licence: Public Domain Dedication (CC0) Functions of flywheel It is used to… Read More »

Bearing | Types, Applications, Failures, Selection, Advantages [Full Guide]

What is a Bearing? A bearing is a mechanical element which allows motion between two rotating parts, with minimum friction. An example of such rotating parts are shaft and its housing. Attribution: By PlusMinus – Own work, CC BY-SA 3.0, Function of bearing A good bearing is expected to do following functions. It should ensure… Read More »

Automobile | Definition, Types, Parts [Fully Explained with Images]

What is an Automobile? An automobile can be defined as “A self-propelled passenger vehicle, used for land transport and generally has four to eight tires, and is powered by an internal combustion engine or an electric motor” The branch of Engineering which deals with the manufacturing and technology of automotive vehicles is known as Automobile… Read More »

Geothermal Energy | Definition, Advantage, Disadvantage, Applications

In this article we will learn following things about Geothermal energy. What is Geothermal energy? Its uses (or applications) Methods to harness it Its advantages and disadvantages (or limitations) What is Geothermal energy? Geothermal energy is a type of thermal energy which is generated and stored in earth. Note: Thermal energy is a type of… Read More »

Solar Energy | Definition, Advantages, Disadvantages & Applications

In this article we will learn following things about solar energy. What is solar energy? Its uses or applications Methods to harness it Its advantages and disadvantages (or limitations) What is solar energy? Solar energy is the radiant light and heat which we get from the sun. There are several methods to harness it for… Read More »