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My AMIE Preparation: Stress Strain Curve, Mild Steel

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Monday, February 14, 2011. Stress Strain Curve, Mild Steel. Those who are familiar with concept of Stress - Strain curve, please do continue with this post to understand about upper yeild strenght and lower yield strenght for mild steel. Those who are not familiar please take time to go through this article. From the image given here taken from etomica.org. Once the stress reaches the upper yield strength,. Of the material. The explaination can be summarized as follows. Don't forget to grab a copy of Mat...

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My AMIE Preparation: March 2011

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Monday, March 21, 2011. Creep Behavior of Materials. When a metal or alloy is under a constant load or stress, it may undergo progressive plastic deformation. Over a period of time, even though applied stress. Is less than the yield strength at that temperaure. This time dependent strain is called creep (above definition is taken from AMIE study material) More information is taken from Wikipdeia and shown below. Is the creep strain, C. Are exponents dependent on the creep mechanism, Q. Which is essential...

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My AMIE Preparation: February 2011

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Monday, February 28, 2011. We have been speaking about tensile toughness. Can be defined as the resistance offered by material to plastic deformation i.e. the ability to resit indentation and penetration or abrasion. Here, the load is applied slowly and the strain rate is quite slow too. But in real life materials are also subjected to sudden blows. The resistance offered by materials to such blows (or impacts) can be called as impact toughness. Which is essential for preparing for AMIE, Material Science.

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My AMIE Preparation: January 2011

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Sunday, January 30, 2011. Tensile Test, Part Two. Please read the previous part of this article here. Curve for ductile material is given here:. The points to note from this picture are:. The material is elastic. Till this point in the curve. The stress strain ratio is constant when the curve is linear within this zone. The material deforms in this zone but regains original shape and size once the load is removed. The working stress is always much below the Elastic Limit. Ultimate tensile strength (.

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My AMIE Preparation: November 2010

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Monday, November 29, 2010. Syllabus Material Science, AMIE. MATERIAL SCIENCE AND ENGINEERING (AD 302). Metal and alloys, ceramics, polymers and semiconducting materials—introduction and application as engineering materials. Point, line and surface defects. Diffusion in solids. Monocomponent and binary systems, non-equilibrium system, phase diagram and application in crystalline and non-crystalline solids. Ceramic materials and polymers. Composites, particle and fibre reinforced composite. Composite m...

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My AMIE Preparation: Disclaimer

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All notes, post, info posted on my blog are correct to the best of my knowledge. Care is taken to ensure that errors don't creep into the same. Care is also taken such that I don't mess up with topics, misunderstandings don't arise and such. Readers are requested to verify the info posted here before coming to any conclusion. I don't claim liability to any loss ( material / academic / of whatsoever form may be ) which is incurred by the reader. Subscribe to: Posts (Atom). No Of Atoms in Zinc Unit Cell.

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My AMIE Preparation: Tensile Toughness

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Sunday, February 13, 2011. Energy observed by material prior to fracturing is called toughness. It depends on both strength and ductility of the material in question. A pic from www.etomica.org is given below to show the relationship the three entities in question viz tensile toughness, ductility and strength. The word toughness is usually used for tensile toughness. In tesile toughness, the strain rate is relatively slow. There is another type of toughness called as impact toughness. Hello Everyone, &#1...

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My AMIE Preparation: A note on AMIE Old Question Papers -- Section B

http://myamieprep.blogspot.com/2012/04/amie-old-question-papers-section-b.html

Sunday, April 29, 2012. A note on AMIE Old Question Papers - Section B. One of the best way to prepare for AMIE is by going through Old Question papers. I personally scan through old question papers, segregate questions asked topic / chapter wise and based on those questions decide the syllabus. The benefits of this method include:. Good Idea on the actual syllabus of the exam. Good Idea on the type of questions asked *giving you ample time to think about the style in which you can answer*. Hello Everyon...

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My AMIE Preparation: No. Of Atoms in Zinc Unit Cell

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Monday, November 22, 2010. No Of Atoms in Zinc Unit Cell. I have been going through the question papers again. I found a rather interesting question viz "Calculate the no. of atoms in zinc unit cell? First some basics about Calculation of Number of Particles per Unit Cell of a Cubic Crystal System. Keeping the following points in mind we can calculate the number of atoms in a unit cell. An atom at the corner is shared by eight unit cells. Hence an atom at the corner contributes 1/8 to the unit cell.