Education

Academic Experience

ENS207 ENGINEERING GRAPHICS

Spring 2019

 Syllabus

Lectures ----------------/sites/default/files/u807/solution_to_orthograhic_views.pdf-----------------------

Lecture_1

Lecture_orthographic projection(multi views)

solutions for orthographic projections week 2

Lectures_auxilary view

Lectures_auxilary view

lecture_section view

DIMENSIONING

HOMEWORKS -----------------------------------------------------------------------------------------------------------------------------------------

Homework-1  Orthographic projection ( multi views)    Deadline:

21. 03.2019

Homework-2  Missing lines    Deadline:

Homework- 3 (2D drawing on AutoCAD, dimensioning  practices,)   deadline: 17/05/2019

submit your drawing to  ens207hw@gmail.com

EXAMS-------------------------------------------------------------------------------------------------------------------------------------------------

Announcement:

Midterm Exam Results (spring 2019)

Quiz-1

Quiz-2 class group list (16/05/2019)

 Projects -------------------------------------------------------------------------------

PROJECT-1:  In this project an industrial device should be drawn with its components; this is called as working drawing. You need to draw  2D parts with their right dimensions including dimension lines (remember to use different layers for dimensions) and any other annotations visible on the drawing. Also, include 3D solid model and isometric drawing of the part.  You will submit both hard copy and soft copy personally to me and explain the drawing details.  Download 

Dead line for submission: 30/05/2019

,

ENS205 Material Science

FALL 2018 ===================================================================================================================

Syllabus

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Homework -1:  Answer the following questions; 

Chapter-1==> 1.4, 1.6,  1.7, 1.8, 1.17,

Chapter -2  ==> 2.1 to 2.5, 2.6, 2.7, 2.8, 2.11, 2.13, 2.16, 2.19, 2.20, 2.24, 2.26   Deadline: 17/10/2018 !!  (do not include cover page, use both side of the paper, spend minimum amount of the paper possible for the homeworks )

Note; Homework can be written by hand or on PC , both method is OK. You need to submit hard copy ,please don't send via e-mail.

Homework -2:  Answer the following questions; 

Chapter-3 ==>  3.1 to 3.8, 3-13, 3-15, 3-14,  3-17,  3-38,  3-41, 3-43       Deadline: 2/11/2018

Chapter-4 ==>  4.2,  4.3,  4.6,  4.26, 4.27 (think about dislocations availablity in creamics), 4.28, 4.29, 4.32, 4.33,  4.54, 4.55, 4.56,4-57  Deadline: 2/11/2018

Chapter-5 ==>  5.1 to 5.9 , 5.12, 5.13, 5.15, 5.18, 5.21, 5.31, 5.32  5.38, 5.57, 5.58, 5-59  Deadline: 2/11/2018

Homework -3:  Answer the following questions; 

Chapter-6 :   (write down answers for 10 problems only which are arbitrary selected by you )  6.4 to 6.9,   6.11 to 6.15,  6.18, 6.19, 6.21, 6.22, 6.23, 6.25, 6.26, 6.27, 6.38, 6.43, 6.41, 6.44        Deadline:  19/11/2018

Homework -4   (chapters 7, 8, 9)   deadline : 21/12/2018

Chapter  7:  7.1, 7.2 , 7.3, 7.4, 7.6, 7.11, 7.13, 7.14, 7.16, 7.17, 7.38, 7.23, 7.24, 7.25

Chapter 8:  8.1, 8.2, 8.4, 8.8, 8.17, 8.25, 8.26, 8.27, 8.32, 8.35, 8.45, 8.52, 8.56

Chapter 9:  9.1 to 9.4,  9.8, 9.9, 9.13, 9.15, 9.21, 9.51

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Announcement

Quiz - 1   will be held on   31/10/2018  at 9 :00

Included chapters for the quiz-1 :   Chapter 2 to 5 (included). Possible numerical problems: chapter -2 (number of atoms and molecule calculations), chapter-3 (finding miller indices for atomic direction and planes, calculation of atomic radius , finding crytal structure), chapter-4 (calculation of number of vacancies ) , chapter-5 (calculation of jump rate).

Date of  Midterm Exam : 12/11/2018  at 9:00 PM  (lecture room )

Midterm Exam will cover the  following topics in each chapter: 

Chapter 2 : All included.

Chapter 3:  3-1 Short-Range Order versus Long-Range Order,  3-2 Amorphous Materials ,  3-3 (Unit cell,  Lattice Parameters and Interaxial Angles, Number of Atoms per Unit Cell, Atomic Radius versus Lattice Parameter, packing factor,  density), 3-5 (Coordinates of Points, Directions in the Unit Cell, Significance of Crystallographic Directions, Repeat Distance, Linear Density, and Packing Fraction, Planes in the Unit Cell, Isotropic and Anisotropic Behavior, )

Chapter 4:  4-1 Point Defects, 4-3 Dislocations, 4-4   Significant of  Dislocations, 4-6  Influence of Crystal Structure, 4-7 Surface Defects (Material Surface, Grain Boundaries),  4-8 Importance of Defects *.

Chapter 5:  5-1 Applications of Diffusion (know at least three application), 5-2 Stability of Atoms and Ions, 5-3 Mechanism for Diffusion, 5-4 Activation Enrgyfor Diffusion,  5-5 Rate of Diffusion [Fick’s First Law], 5-6 Factors Affecting Diffusion*,

Chapter 6: 6-1  Technological Significance , 6-2 Terminology for Mechanical Properties, 6-3 The Tensile Test: Use of the Stress–Strain Diagram, 6-4 Properties Obtained from the Tensile Test, 6-5 True Stress and True Strain, 6-6 The Bend Test for Brittle Materials, 6-7 Hardness of Materials.  

Numerical problem will be regarding  Diffusion and  Mechanical Properties of Materials.

Midterm Exam results

 ASSIGNMENT-1: Failure Analysis: For this assignment you need to find failed (broken) metal part, and analyze it in terms of fracture mechanics. This part can be any metal part on your home , on  street or in  industrial areas.  First focus on the fracture mechanism i.e. ductile, brittle or fatigue ( look at surface and broken area to understand mechanism by referring your knowledge from chapter 7 -repeat chapter 7 before writing this assignment). Then, write about possible reason about fracture i.e. due to over loading, environment temperature (DBBT important here) , corrosion, or cyclic loading -which cause fatigue. Include, photo of the metal part  and some background information to your assignment. 

Due date : 10/12/2018

Announcement !

Quiz - 2   will be held on   19/12/2018  at 9 :00-10:00  AM.

 Included chapters for the quiz-2:  Chapter 7, 8 and 9. pay attention to homework questions.

Material Selection study material-----

Lecture silide. 

Book

Paper

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ASSIGNMENT_3  Material Selection. You are assigned to a certain product to select material by using the material selection methodology weighted property index method. You should prepare presentation and the completed assignmnet documentation (report) due   Monday  7/1/2019. You can find your assignment from here.

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Quiz-2  results.

Final Exam Review:   Study following chapters and topics for the final exam.

• Chapter 5:  5-1 Applications of Diffusion (know at least three application), 5-2 Stability of Atoms and Ions, 5-3 Mechanism for Diffusion, 5-4 Activation Energy for Diffusion,  5-5 Rate of Diffusion [Fick’s First Law], 5-6 Factors Affecting Diffusion.
• Chapter 6: 6-1  Technological Significance, 6-2 Terminology for Mechanical Properties, 6-3 The Tensile Test: Use of the Stress-Strain Diagram, 6-4 Properties Obtained from the Tensile Test, 6-5 True Stress and True Strain, 6-6 The Bend Test for Brittle Materials, 6-7 Hardness of Materials.  
• Chapter 7: Except 7-5 Weibull statistics all chapter.
• Chapter 8:   All chapter.
• Chapter 9: 9-4,  9-5, 9-6, 9-7, 9-8.
• Material selection process,  theory, and methods.
• Note: Mostly focus on the homework problems if they are available for the relevant topics.
• I will ask two problems one from the mechanical properties of materials and another one related to Chapter -7.

Good luck!

/sites/default/files/u807/exam_questions.docxSample  questions for makeup exam preparation.

Last update on  28/08/2019

Links for extra resources :

• http://www.wiley.com/college/callister/0470125373/vmse/index.htm( here you will find a good simulation of diffusion, cell structure, tensile test, and others )
• https://www.youtube.com/watch?v=uG35D_euM-0  (in this video you will find a good summary of what have learned untill now partially. We will watch this in the class as well )
• http://ocw.metu.edu.tr/mod/resource/view.php?id=5849  (tensile test _in turkish )
• https://www.youtube.com/watch?v=D8U4G5kcpcM (tensile test, yield point phenomenon )
• https://www.youtube.com/watch?v=RJXJpeH78iU   (brinell hardness test)
• https://www.youtube.com/watch?v=G2JGNlIvNC4&nohtml5=False  (rockwell hardness test)
• https://www.youtube.com/watch?v=7Z90OZ7C2jI&nohtml5=False  (vicker hardness test)
• https://www.youtube.com/watch?v=tpGhqQvftAo&nohtml5=False  (Charpy impact test )