Notlarınızın Son Hali:

Düzeltme: Emrah ve Ferdi,nin Attend/HW/Particip kısmı karışmış olduğundan düzeltildi.

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Pek sayın, saygılı ve sevgili öğrenciler,

Bir ECE 447'nin daha sonuna geldik. Bu derse katılımınız ve katkılarınız için teşekkür eder, finallerinizde başarılar dilerim. Unutmayınız ki bilgi, unutulanlardan sonra akılda kalandır. Umarım burada öğrendiğiniz birçok şey kalmıştır.

Aşağıda şuana kadar topladığınız puanlarınızı görebilir (notlar 100 üzerinden olup, ağırlık yüzdeleri de belirtilmiştir), buna göre iyi bir harf için finalden kaç almanız gerektiğini hesaplayabilirsiniz :)

 

 

Not: Asağıdaki tabloda sarıya boyananlar (en kötü bir quiz) quiz ortalamasına katılmadı.

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Your homework for wednesday: 18.1, 18.2 and 18.3

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May 13, 2011

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Duyuru: 

Yeni kurulan Malzeme Bilimi ve Mühendisliği bölümümüz, 10 Mayıs Salı günü saat 17:00'de ilk seminer konuğunu, ABD'nin en iyi universitelerinden biri olan Texas A&M'den ağırlayacak. Asağıda seminer bilgisi mevcut. Bu seminere katılanlar Bonus alacaklar. Bilginize :)

 

Çankaya University, Materials Science & Engineering Departmental Seminar
 
SEMINAR
Tuesday, May 10, 2011
Time: 17:00
Venue: Çankaya University, MAVİ SALON (Blue Seminar Hall)
 
From bit to it: the application of computational materials science to the development of novel materials
 
Raymundo Arróyave
Department of Mechanical Engineering, Materials Science and Engineering
Texas A&M University
College Station, TX USA
 
In this talk, I will discuss some examples in which my students and I have used computational materials science tools to assist the development of novel materials. In my group, we have studied a rather diverse range of material systems, with the main research themes centered on the development of novel materials for energy storage, energy generation, improved energy usage as well as green manufacturing. Most of our projects involve tightly coupled collaboration with groups focused on the synthesis and experimental characterization of materials. This synergistic computational-experimental approach falls within the emerging sub-field of Integrated Computational Materials Engineering. The talk will consist of short descriptions of the most up-to-date results related to: the investigation of phase stability in next-generation nuclear fuels; the development of computer simulations of microstructure processes in microelectronics manufacturing; the development of multi-layered nanofilms for hydrogen storage; the investigation of the phase stability, structural and magnetic properties of novel shape memory alloys as well as new strategies for the computer-aided design of advanced alloys through the use of genetic algorithms.
 
About the Speaker: Raymundo Arroyave received his B.Sc. degree from Instituto Tecnol´ogico y de Estudios Superiores de Monterrey (Monterrey, M´exico), Mechanical and Electrical Engineering Department in 1996, and the M.Sc and the Ph.D degrees from the Materials Science and Engineering Department of Massachusetts Institute of Technology (MIT) in 2000 and 2004. He has been serving as Faculty Member in the Departments of Mechanical Engineering and Materials Engineering of Texas A&M University since 2006.

 

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May 6, 2011

Exercises for Chapter 8 (will be discussed on May 6, Friday in class)

 

1. Estimate the theoretical fracture strength of a brittle material if it is known that fracture occurs by the propagation of an elliptically shaped surface crack of length 0.28 mm and having a tip radius of curvature of 1.2 × 10−3 mm when a stress of 1200 MPa is applied.

2. A polystyrene component must not fail when a tensile stress of 1.25 MPa is applied.  Determine the maximum allowable surface crack length if the surface energy of polystyrene is 0.50 J/m2 .

Assume a modulus of elasticity of 3.0 GPa

3.  Some aircraft component is fabricated from an aluminum alloy that has a plane strain fracture toughness of  35 MPa m .  It has been determined that fracture results at a stress of 250 MPa when the maximum (or critical) internal crack length is 2.0 mm.  For this same component and alloy, will fracture occur at a stress level of 325 MPa when the maximum internal crack length 

is 1.1 mm?  Why or why not?

 

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April 13, 2011

I will attend a seminar on Friday at 15:30, therefore, there won't be class on friday (April 15).

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First Midterm will be held on April 13th, 2011 (Wednesday) in A-319.

Chapters: 1,2,3,4,5 are included.

Don't forget to bring your CALCULATORS, you cannot SHARE! 

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March 21, 2011

HW 2: due date: April 6, 2011

 

 A metal sheet of 1.8 mm thick has nitrogen atmospheres on both sides at 1200°C and is permitted to achieve a steady-state diffusion condition.  The diffusion coefficient for nitrogen in steel at this temperature is 6 × 10−11 m2/s, and the diffusion flux is found to be 1.2 × 10−7 kg/m2⋅s.  Also, it is known that the concentration of nitrogen in the steel at the high-pressure surface is 4 kg/m3.How far into the sheet from this high-pressure side will the concentration be 2.0 kg/m3?  

Assume

  • a linear concentration profile
  • xA is zero at the surface

 

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March 25, 2011

Name Surname HW 1 Quiz 1
Volkan EROĞLU + 4
Süleyman BİREYŞOĞLU - 0
Gökcan GÜRDAL + 8
Ferdi YILDIZ + 8
Emrah ÇAĞLAR + 9
Fatih DEMİRCİ + 10
Berk EROL + 6
Gizem FUTTU + 10
Serkan GÖRSE + 9
Zeynep KORKMAZ + 6
Neval ZÜMRÜT - 0
Ave     6

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March 18, 2011

  1. Please bring HW 1 (Chosen "example problems" in chapt 3) to class on wednesday (March 23)
  2. Other HW: read chapter 1, 2, 3
  3. There will be a quiz on wednesday (Bring your calculators)

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