ME 260: INTRODUCTION TO ENGINEERING MATERIALS 1.1 Instructor: Dr. K. Morsi Dept. of Mechanical Engineering Office: E305 Engineering Building E-mail: [email protected]

ME 260: INTRODUCTION TO ENGINEERING MATERIALS 1.1

Instructor: Dr. K. MorsiDept. of Mechanical Engineering

Office: E305 Engineering BuildingE-mail: [email protected]

Office Hours: 1-3pm MW.

Meeting times and place: 10:00-10:50 a.m. MWF PS130

Website

http://attila.sdsu.edu/~morsi

ME240: ME240: INTRODUCTION TO ENGINEERING MATERIALSINTRODUCTION TO ENGINEERING MATERIALS


TextMaterials Science and Engineering, An IntroductionWilliam D. Callister, David, RethwischJr., 9th Ed.,

John Wiley and Sons, 2014. WebsiteCourse information and homework solutions will be posted at:

Website: http://eon.sdsu.edu/~morsiEnter website then go to teaching then ME260

POWERPOINT PRESENTATIONS & Homework solutions

Password me260

Prerequisite: Chemistry 202 and credit or concurrent registration in Engineering Mechanics 200 or 202


MID TERMS (3) = 100%MID TERMS (3) = 100%Best 2 count for 40% each, worst midterm Best 2 count for 40% each, worst midterm counts for 20%counts for 20%

TOTALTOTAL 100% 100%

Determination of Course Grade

Your homework, three 50 min tests and a writing assignment will determine your grade.

OFFICE HOURS: 1-3 pm MW

Homework = extra 3 %

NO FINAL


Homework

Homework assignments are listed on the webpage. These assignments are due at the beginning of the class. Homework is to be turned in on 8 1/2 x 11 paper with: your name, student number, the date, and assignment number written on the outside of the paper.

EXAMPLE:Joe Smith

1/21/04Homework #1

In your solutions, the final Answers to homework questions must be boxed in red to receive credit.

e.g. Energy = 10 MJ.

VERY IMPORTANT


The homework is given first and foremost for the benefit of the student for practice and will contribute to the student’s grade for bonus points. Bonus points will be added to the final course average according to the following scale: 65% qualifying homework assignments: 1 point; 75% qualifying homework assignments: 2 points, 85% qualifying homework assignments: 3 points. For a homework assignment to qualify, at least 70% of the points must be earned. The homework will be graded on effort. Although you are encouraged to work together on the homework, the assignment handed in must reflect your personal effort only. i.e. it must be your own solution. Solutions to the all the questions on the assignments will be available on the website on the day the homework is returned.

Students who submit assignments that show strong dependence on solutions or any sort of cheating (for example: a correct answer presented for an incorrectly worked problem ..etc) will be given a score of zero for the entire homework for the whole semester. Students who copy solutions from others are guilty of academic dishonesty and may be subject to disciplinary action. Illegible and/or sloppy homework, or work turned in on pages ripped from spiral notebooks will be returned ungraded.

No late homework will be accepted except under documented extenuating circumstances. Homework is due at the beginning of class on the specified day. If you must be absent for a class, you may turn in your homework early, or have a fellow student turn it in on the due date and notify the instructor prior to your absence.


ATTENDANCE POLICY

Regular attendance in this class is required. The instructor reserves the right to lower a student's grade due to poor attendance. Attendance sheets will be passed out on random dates throughout the semester. If a student misses a class without proper justification and without previously notifying the instructor he/she will be counted as being absent once. The first time this happens, the student will not be penalized, and it will not count against him/her, however for every time this happens afterwards, the student’s final average score for the class will be reduced by 2%. For example if a student is unjustifiably absent three lectures in the semester, it will count as 2 absences and his/her final score will be reduced by 4%. The instructor understands that sometimes students will need to be absent from class for legitimate reasons beyond their control, hence the student will not be penalized in such a case. However, notifying the instructor prior to such a case is required.


MAKEUP TESTS/EXAMS

No makeup tests will be given except in very severe and well documented circumstances.

EXTRA TUTORIAL SESSIONS

From time to time the instructor may wish to schedule extra sessions introduced for the purpose of giving students a better grasp of problem

solving. The attendance will not be compulsory.

ACADEMIC DISHONESTY

Cheating of any form including plagiarism (defined by the University in the General Catalogue, page 440) constitutes a serious offence. Cheating will not be

tolerated, and evidence of cheating by a student will result in an automatic “F” as the student's grade and

reported to the Judicial Procedures Office.


SPECIAL NEEDS:

If you have special needs as addressed by the Americans with Disabilities Act (ADA) and need assistance, please notify the course

instructor immediately. Reasonable efforts will be made to accommodate your special needs.

PowerPoint Presentations

Homework Assignments & Solutions

Access to solved problems

Grading and Attendance policies


Fundamentals

IntroductionAtomic Structure/BondingCrystal StructureImperfectionsDiffusion

Mechanical BehaviorMechanical PropertiesDislocations/StrengtheningFailure

Course Outline

Control and ProcessingPhase DiagramsPhase TransformationsThermal Processing

Classes of Materials AlloysCeramicsPolymers


MATERIALSMATERIALSMETALSMETALS

CERAMICSCERAMICSPOLYMERSPOLYMERS

COMPOSITESCOMPOSITESADVANCED MATERIALSADVANCED MATERIALS


Steel gear produced using Powder Metallurgy Close dimensional tolerance and high strength and wear resistance

METALSCombinations of metallic elements

Non bound electrons – thermal/electrical conductivity.


Fighter plane fully covered with a paint replacement adhesive$3 BILLION SAVED OVER LIFE TIME COSTS

POLYMERSOrganic compounds –

mainly based on Hydrogen, Carbon, and non-metallic element


CERAMICSCompounds between metals and non-metals

Properties


Fibers

COMPOSITES

10 m

SiC Alumina

* Metal matrix composites (MMC’s)* Ceramic matrix composites (CMC’s)

* Polymer composites - fiberglass


SEMICONDUCTORS

BIOMATERIALS


Nickel based super alloys Turbine blade mechanically fixed to the rotor of a high performance gas turbine engine

ADVANCED MATERIALSHigh performance applications


ULTRALIGHT MATERIALS – METALLIC FOAMS


NanomaterialsNanomaterials

JOM, Jan 2004


BRITTLE FRACTURE


Processing Structure Properties Performance

Figure 1.1. The four components of the discipline of Materials Science and Engineering and their linear interrelationship

Subatomic

atomic

microscopic

macroscopic

Mechanical

Electrical

Magnetic

Thermal

optical


Processing

Microstructure Properties

Mechanical properties


Figure 1.2 – Alumina (Al2O3) – single crystal and polycrystal

SINGLE CRYSTAL POLYCRYSTAL

POLYCRYSTAL+ PORES


END OF CHAPTER 1

Documents

ME 260: INTRODUCTION TO ENGINEERING MATERIALS 1.1 Instructor: Dr. K. Morsi Dept. of Mechanical Engineering Office: E305 Engineering Building E-mail: [email protected]