INTRODUCTION TO ENGINEERING MATERIALS Instructor: Dr. K. Morsi Dept. of Mechanical Engineering Office: E305 Engineering Building E-mail: kmorsi@mail.sdsu.edu Office Hours: 1-3pm MW. Meeting times and place: 10:00-10:50 a.m. MWF PS130 Website http://attila.sdsu.edu/~morsi ME240: INTRODUCTION TO ENGINEERING MATERIALS

Materials Science and Engineering, An Introduction Prerequisite: Chemistry 202 and credit or concurrent registration in Engineering Mechanics 200 or 202 Text Materials Science and Engineering, An Introduction William D. Callister, David, RethwischJr., 9th Ed., John Wiley and Sons, 2014.   Website Course information and homework solutions will be posted at: Website: http://eon.sdsu.edu/~morsi Enter website then go to teaching then ME260 POWERPOINT PRESENTATIONS & Homework solutions Password  me260

Homework = extra 3 % NO FINAL Determination of Course Grade   Your homework, three 50 min tests and a writing assignment will determine your grade. MID TERMS (3) = 100% Best 2 count for 40% each, worst midterm counts for 20% TOTAL 100% Homework = extra 3 % NO FINAL OFFICE HOURS: 1-3 pm MW

Homework VERY IMPORTANT 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 1/21/04 Homework #1 VERY IMPORTANT In your solutions, the final Answers to homework questions must be boxed in red to receive credit. e.g. Energy = 10 MJ.

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.

EXTRA TUTORIAL SESSIONS   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. 

PowerPoint Presentations Homework Assignments & Solutions 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

Course Outline Fundamentals Introduction Control and Processing Atomic Structure/Bonding Crystal Structure Imperfections Diffusion Mechanical Behavior Mechanical Properties Dislocations/Strengthening Failure Control and Processing Phase Diagrams Phase Transformations Thermal Processing Classes of Materials Alloys Ceramics Polymers

MATERIALS METALS CERAMICS POLYMERS COMPOSITES ADVANCED MATERIALS

METALS Combinations of metallic elements Non bound electrons – thermal/electrical conductivity. Steel gear produced using Powder Metallurgy Close dimensional tolerance and high strength and wear resistance

mainly based on Hydrogen, Carbon, and non-metallic element POLYMERS Organic compounds – mainly based on Hydrogen, Carbon, and non-metallic element Fighter plane fully covered with a paint replacement adhesive $3 BILLION SAVED OVER LIFE TIME COSTS

Compounds between metals and non-metals CERAMICS Compounds between metals and non-metals Properties

* Ceramic matrix composites (CMC’s) * Metal matrix composites (MMC’s) * Ceramic matrix composites (CMC’s) 10 m SiC Alumina Fibers * Polymer composites - fiberglass

SEMICONDUCTORS BIOMATERIALS

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

ULTRALIGHT MATERIALS – METALLIC FOAMS

Nanomaterials 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 Processing  Structure Properties Performance Subatomic Mechanical atomic Electrical microscopic Magnetic macroscopic Thermal optical

Processing Mechanical properties Microstructure Properties

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

END OF CHAPTER 1