Informative Speech

The Free essays given on our site were donated by anonymous users and should not be viewed as samples of our custom writing service. You are welcome to use them to inspire yourself for writing your own term paper. If you need a custom term paper related to the subject of Engineering or Informative Speech, you can hire a professional writer here in just a few clicks.
Informative Speech - Metals Purpose: My purpose is to inform the audience of how different types of steel are formed by explaining the different mechanical properties of Iron and Carbon compositions. I. Introduction A. Have you ever noticed that some steel, such as a long bridge is able to bend and have slack, whereas other types of steel are more brittle yet much harder, such as a propeller. If a bridge were more brittle, a strong perpendicular wind could easily break it in half, and a soft propeller would not give you the torque to accelerate to high velocities because the water would have more effect on it's definition. B. These properties have real life relevance, when steel was discovered in the middle ages it quickly became much more popular than bronze, because of its strength. (Kramer, E. 1992) Steel was a revolution that would affect the world from then on. II. Statement of Central Idea A. The change of iron and carbon to steel has had a profound affect on the world, it has revolutionized science and technology that we understand in the 20th century. B. Different ratios of carbon to iron and different hardening and cooling techniques have furthered our advancements in reaching a utopian compound that has equally elastic and plastic deformation properties. C. Separate processes have been distinguished between the carbon-iron ratio, which allow us to make steel either brittle or elastic. III. Body A. First issue- Dislocations are the strength of all forms of steel. Each individual dislocation forms with another to create a "knot" that holds the matrices of atoms together. The more "knots" there are the stronger the material. The more carbon, up to 6.67%, that is added will create large obstacles that form tangles of dislocations, increasing the strength of the solid. B. Second issue- If we examine the decomposition of Austenite, steel, we see that different levels of % of carbon and temperature can create new variations to a not so simple compound. If we combine .025% or more Carbon to iron and keep the temperature below 750 degrees Celsius we can make a very plastic material, ferrite, that is soft and has little brittility. However, if the compound is heated up and there is less than 2% carbon added we come up with Martensite, which is very brittle but extremely strong to uniaxial force. C. Third issue- When we examine the cooling rates of carbon and iron to the amount of time it takes for them to reach a certain temperature, we can see different characteristics of each solid formed. For example, letter A is Martensite, it is cooled very rapidly and has a very isothermal transformation. If we examine letter B or C we see that they both pass through the Ferrite stages denoted by the hyperbolas bound to the regions Ae1 and Ms. These have a less isothermal transformation and become

Our inspirational collection of essays and research papers is available for free to our registered users

Related Essays on Engineering

Scarlet Letter: Dimmesdale's Suffering

In Nathaniel Hawthorne's The Scarlet Letter, Dimmesdale, experiences the most emotional suffering from the weight of guilt placed upon him as the father of an illegitimate child. His lover, Hester...

read more
what is friction

To find the coefficients of friction in a given system, an experiment needs to be performed. Finding the coefficient of static friction is the natural first step. Once this coefficient is found, the ...

read more
Pro Genetic Engineering

Genetic engineering has struck a major controversy concerning issues in heath care, engineering of food and other biological agents, and cloning. Genetic engineering is the process of manipulating th...

read more
Automotive History

Automotive History Why is it called an automobile? Or now a car? Why isn't it called anything else? Oliver Evens applied for a U.S. patent in Philadelphia in 1792 on a steam land carriage, which...

read more
virtual memory and its architecture in operating systems

INTRODUCTION Virtual memory refers to an imaginary set of locations, or addresses, where you can store data. It is imaginary in the sense that the memory area is not the same as the real physical m...

read more
CUESTIONARIO TECNICO DE LA MADERA

CUESTIONARIO TECNICO DE LA MADERA 1) Cuales son los principales componentes que constituyen a la madera. La madera como toda sustancia viva, esta formada por multitud de pequenas un...

read more