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MAT 033: Engineering Materials and Processes

MAT 033: Engineering Materials and Processes. Course Objective... Introduce fundamental concepts in M aterials Science. You will learn about: material structure how structure dictates properties how processing can change structure. This course will help you to: • use materials properly

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MAT 033: Engineering Materials and Processes

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  1. MAT 033: Engineering Materials and Processes Course Objective... Introduce fundamental concepts in Materials Science • You will learn about: • material structure • how structure dictates properties • how processing can change structure This course will help you to: • use materials properly • realize new design opportunities with materials

  2. Lectures Lecturer: Chris Kiely Time: Mon 11.10 – 12.00 ; Weds 11.10-12.00 Location: 101 Packard Laboratory Activities: • Present new material • Announce reading and homework • 2 Quizzes

  3. Recitations Times and Places: J.M. Rickman 203 Whitaker Th 12.10 pm Th 1.10 pm 203 Whitaker M. Watanabe R.P. Vinci 203 Whitaker Fr 9.10 am J.M. Rickman Fr 10.10 am 203 Whitaker A. Kovalskyy Fr 11.10 am 203 Whitaker Purpose: • Discuss homework, quizzes and exams • Hand back graded quizzes, exams • Discuss concepts from lecture Recitations start this week.

  4. Course Material Required text: • Fundamentals of Materials Science and Engineering:An Integrated Approach W.D. Callister, Jr. and D.G. Rethwisch,3ndedition, John Wiley and Sons, Inc. (2008). Option 1: Hardbound version: $200 (new) - $144 (used) Option 2: Simple ring binder version: $94 Option 3: On-line version $50 Option 4: Amazon Kindle version $97

  5. Reading Schedule See the detailed course syllabus which is posted on:- coursesite Go to http://coursesite.lehigh.edu/and login using your Lehigh username and password Course materials will be posted under:- MAT-033-00-FL10-ENGR MATLS & PROCESSES

  6. Grading Weekly homework problems – 20% Recitation sessions/pop quizzes – 10% Quiz #1 20% Scheduled for: 10/04 Material covered ; Lectures 1-8 Quiz #2 25% Scheduled for: 11/08 Material covered; Lectures 9-16 Final Exam 25% To be scheduled Material covered: everything w/extra emphasis on last 10 lectures

  7. The Weekly Homework “Cycle” • Lectures are on Mondays and Wednesdays. • Recitations are on Thursdays/Fridays. • Homework assigned weekly and will be posted on the coursesite every Tuesday. • Homework must be handed in at the beginning of the lecture on the following Monday. • Homework will returned during the Thur/Fri recitation session.

  8. The Periodic Table

  9. Materials Classification – Metals Pure metals or combinations of metallic elements (alloys) – metallic bonding • Dense • Good electrical conductors • Good heat conductors • Shiny appearance – lustrous • Strong • Deformable- malleable • Sometimes magnetic Structural feature Dimension (m) -10 < 10 atomic bonding -10 10 -8 -1 crystals (ordered atoms) 10 -10 second phase particles -8 -4 10 -10 crystal texturing -6 > 10

  10. Materials Classification – Ceramics Compounds between metallic and non-metallic elements - Ionic or covalently bonded • Hard • Brittle • Electrical insulators • Poor thermal conduction • Heat and corrosion resistant • Can be transparent or opaque

  11. Materials Classification – Polymers Organic compounds based on C, H and other non-metallic elements – covalent and secondary bonding • Huge variety of properties • Low densities • Non-conductors • Low melting points • Can be very flexible

  12. Composites • which consist of more than one material type

  13. Semiconductors Ceramic materials that have electrical properties that are intermediate between that of conductors and insulators Micromechanical machines made from silicon Transistor Technology

  14. Biomaterials - metal, ceramic or polymer materials designed for implanting in the human body

  15. Effect of Processing e.g. Mechanical Properties • Properties depend on structure ex: hardness vs structure of steel Hardness (BHN) • Processing can change structure ex: structure vs cooling rate of steel

  16. Effect of Composition & Processing e.g. Electrical Properties • Electrical Resistivity of Copper: • Adding “impurity” atoms to Cu increases resistivity. • Deforming Cu increases resistivity.

  17. Effect of Structuree.g. Optical Properties polycrystal: low porosity polycrystal: high porosity single crystal • Transmittance: -Aluminum oxide may be transparent, translucent, or opaque depending on the material structure.

  18. Materials Selection 1. Pick Application Determine required Properties mechanical, electrical, thermal,magnetic, optical, corrosion resistance. 2. Properties Identify candidate Material(s) Material: structure, composition. 3. Material Identify required Processing Processing: changes structure and overall shape ex: casting, sintering, vapor deposition, doping, forming, joining, annealing.

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