Due to the high lattice distortion, martensite has high residual stresses. Thus, each vertical dashed line, like the solid line in fig. This comprehensive course leads the audience through a large variety of metallurgical aspects that influence steel products. Nptel, online courses and certification, learn for free. Fec phase diagram lecture 33 free download as powerpoint presentation. Iron carbon phase diagram iron shows a eutectic with carbon allowing for a lower melting alloy body centered tetragonal. When we look at the phase diagram over a range of different temperatures, what we see is iron melts at a temperature of 1538 c.
And as you cool down pure iron and some amount of carbon in the material what you get is a phase that is called delta iron. If the percentage of the carbon is in the range of 0 to 2. Lecture 21 free energy composition diagrams for monotectic systems and syntactic phase diagram lecture 22 quasichemical theory i lecture 23 quasichemical theory ii lecture 24 quasichemical theory free enegy formalism lecture 25 solid state reaction lecture 26 introduction to iron carbon phase diagram lecture 27 eutectoid. Introduction to ironcarbon equilibrium diagram structures in fec diagram iron carbon equilibrium diagram fig. Ttt diagram indicates a specific transformation starts and ends and it also shows what percentage of transformation of austenite at a particular temperature is achieved. These material science handwritten study notes will help you to get conceptual deeply knowledge about it. Mar 07, 2014 iron carbon phase diagram, ttt diagram, cct diagram slideshare uses cookies to improve functionality and performance, and to provide you with relevant advertising. Nov 01, 2017 steel is an alloy of carbon and iron and other alloying elements e. An evaluation version of novapdf was used to create this pdf file.
Lecture 27 eutectoid transformation in ironcarbon phase diagram lecture 28 austenite to pearlite transformation in ironcarbon phase diagram lecture 29 hypoeutectoid steels. Development of microstructure in iron carbon alloys. Now, we consider only a part of fefe3c diagram referring to steel. A study of the microstructure of all steels usually starts with the metastable ironcarbon fec binary phase diagram figure 1. Module 23 iron carbon system i lecture 23 iron carbon nptel hypoeutectoid steel, hypereutectoid steel, hypoeutectic white cast iron, on the basis of this diagram iron carbon alloys having less than 2. Ironcarbon phase diagram iron shows a eutectic with carbon allowing for a lower melting alloy body centered tetragonal. Note that carbon lowers the freezing point of iron and that it broadens the tempera. Module 23 iron carbon system i lecture 23 iron carbon system i 1 nptel phase ii. According to the diagram, point b is which of the following. Nptel provides elearning through online web and video courses various streams.
Were now going to focus in this lesson, on the ironcarbon system. Ghosh, dept of metallurgical and materials engineering keywords. Iron carbon phase diagram in their simplest form, steels are alloys of iron fe and carbon c. The iron iron carbide fefe3c phase diagram in their simplest form, steels are alloys of iron fe and carbon c. A binary alloy contains two components, a ternary alloy three, etc.
Unit quiz the ironcarbon system multiple choice identify the choice that best completes the statement or answers the question. Mar 04, 2018 iron carbon diagram hindigate 2019 mechanical engg. A lecture about the ironcarbon equilibrium phase diagram. Phase diagrams definitions and basic concepts phases and microstructure binary isomorphous systems complete solid solubility binary eutectic systems limited solid solubility binary systems with intermediate phasescompounds the ironcarbon system steel and cast iron. Unit cell unit cell is the basic building block of crystal structure and defines the crystal structure by virtue of its geometry and the atom positions within.
Iron carbon diagram presentation linkedin slideshare. Greater than 1 wt% c is rare, used for razor blades, cutlery, etc. It consists of atoms of at least two different types where solute atoms. Pdf me8491 engineering metallurgy em books, lecture. Steel is an alloy of carbon and iron and other alloying elements e.
It also covers reactions at different temperatures, the dependence of. Lecture 45 equilibrium indian institute of technology. It is the hardest structure that appears on the diagram, exact melting point unknown. Dmitri kopeliovich ironcarbon phase diagram describes the ironcarbon system of alloys containing up to 6. However, ductility is loss martensite is too brittle and a post heat treatment is. Compulsory,2 marks will be given from this iron carbon diagram theory in any exam. It provides an invaluable foundation on which to build knowledge of both carbon steels and alloy steels, as well as a number of various heat treatments they are usually subjected to hardening, annealing. Section ii the cfe carboniron system by ho okamoto asm international equilibrium diagram the number of experimental and theoretical publications on the fec phase diagrams and related subjects is virtually unlimited because of the unqueslionable importance of fec alloys in all as. Phase a portion of a system that has uniform physical and chemical characteristics. Composition of this singlephase region is shown by in fig. Phase diagrams in materials science and engineering unit 8 week 7 s. Dmitri kopeliovich iron carbon phase diagram describes the iron carbon system of alloys containing up to 6.
A two component system is the simplest of multicomponent systems. Email tel office section classroom instructor sameer khandekar me samkhan 7038 sl109 l16. Cast iron is an alloy of carbon and iron and other alloying elements e. They refer to the independent chemical species that comprise the system. Module 25 ternary phase diagram lecture 25 ternary phase diagram 1 nptel phase ii. The ironiron carbide fefe3c phase diagram microstructures of iron.
Lecture 27 eutectoid transformation in iron carbon phase diagram lecture 28 austenite to pearlite transformation in iron carbon phase diagram lecture 29 hypoeutectoid steels. This graph, which is known as iron carbon equilibrium diagram has the following important points. Iron carbon diagram hindigate 2019 mechanical engg. Phase diagrams in materials science and engineering dvd. Most carbon steel is less than 1 wt% c greatest tonnage produced in the 0.
Pdf me8491 engineering metallurgy em books, lecture notes. Eso 201a thermodynamics indian institute of technology kanpur. When temperature of an alloy from this range reaches. Introduction to materials science chapter 9, phase diagrams 2 component chemically recognizable species fe and c in carbon steel, h2o and sucrose in sugar solution in water. Iron carbon phase diagram, ttt diagram, cct diagram slideshare uses cookies to improve functionality and performance, and to provide you with relevant advertising. Iron carbon diagram iron steel free 30day trial scribd.
Iron carbon phase diagram crystal structure the atoms of liquid metal during solidification arrange themselves into a systematic pattern called a crystal structure. The ironiron carbide fefe3c phase diagram in their simplest form, steels are alloys of iron fe and carbon c. Material science study notes hand written free pdf. Home page of the doitpoms micrograph library, based in the department of materials science and metallurgy in the university of cambridge. Ghosh,department of metallurgy and material science, iit kharagpur.
Classification scheme for the various ferrous alloys. The study of the constitution and structure of iron and steel start with the iron carbon phase diagram. The main structures, significance of various lines and critical points are discussed as. The fec phase diagram is a fairly complex one, but we will only consider the steel part of the diagram, up to around 7% carbon. Mod01 lec23 ironcarbon phase diagram tutorial of principles of physical metallurgy course by prof r. The iron carbon diagram there are two iron carbon equilibrium diagrams. The study of the constitution and structure of iron and steel start with the ironcarbon phase diagram. If you continue browsing the site, you agree to the use of cookies on this website. Mod01 lec23 ironcarbon phase diagram video lecture by. Now in order for us to do that, lets go back and take a look at the iron carbon phase diagram.
A compound of iron and carbon that is very hard and brittle. It provides an invaluable foundation on which to build knowledge of both carbon steels and alloy steels, as well as a number of various heat treatments they are usually. L liquid phase a ferrite bcc structure ferromagnetic fairly ductile d bcc structure. Eso 201a thermodynamics indian institute of technology. Iron carbon phase diagram in brief engineering insider. Structure of interfaces, lectures notes in pdf, 6 kb part vi. Lecture 45 equilibrium indian institute of technology madras. Iron carbon diagram free download as powerpoint presentation.
The high lattice distortion induces high hardness and strength to the steel. Learn for free, pay a small fee for exam and get a certificate. We are here to provides you best study notes from best coachings like made easy, ace academy etc and lecture notes of best institutions like mit open course, iit nptel, iisc, virginia, carlos iii, tennessee, portland university etc, which could. Ghosh,department of metallurgy and material science,iit kharagpur. Temperature is plotted along the ordinate, and the abscissa represents the carbon concentration in alloys, in weight percent.
Jan 05, 2014 principles of physical metallurgy by prof. Phase transformations in ironcarbon alloys the ironcarbon diagram looks like a combination of state diagrams considered above see fig. Iron carbon phase diagram with detailed explanation. Microstructure and property changes in iron carbon system. Mod01 lec28 metal working deformation processing contd. Download link is provided and students can download the anna university me8491 engineering metallurgy em syllabus question bank lecture notes part a 2 marks with answers part b marks and part c 15 marks question bank with answer, all the materials are listed below for the students to make use of it and score good maximum marks with our study materials. Metastable iron carbon fec phase diagram a study of the microstructure of all steels usually starts with the metastable iron carbon fec binary phase diagram figure 1. Section ii the cfe carboniron system by ho okamoto asm international equilibrium diagram the number of experimental and theoretical publications on the fec phase diagrams and related subjects is virtually unlimited because of. Phase diagrams metastable ironcarbon fec phase diagram. Iron carbon diagram iron iron carbide phase diagram iron iron carbide phase diagram features of ironiron carbide diagram phases present. Fe3c iron carbide called cementite because it is hard.
457 924 498 635 1314 942 18 1241 251 1372 570 546 690 482 328 1532 1395 1464 101 947 15 1050 769 41 1346 1400 1402 1558 767 399 896 822 700 846 35 202 803 702 1320 1454 996 1240 302 157 1082 1352 1115 410 852 1020