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MATSE 259

MATSE 259. Properties and Processing of Engineering Materials Christopher L. Muhlstein, Ph.D. Department of Materials Science and Engineering The Pennsylvania State University University Park, PA. Today’s Lecture. Administrative issues (syllabus, etc.)

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MATSE 259

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  1. MATSE 259 Properties and Processing of Engineering Materials Christopher L. Muhlstein, Ph.D. Department of Materials Science and Engineering The Pennsylvania State University University Park, PA

  2. Today’s Lecture • Administrative issues (syllabus, etc.) • Introduction to materials engineering

  3. Instructor: E. Ryba e-mail: ryba@ems.psu.edu Office: 122 Steidle Bldg. Office Hours: by appt. TA: Youngho Jin e-mail: yuj107@psu.edu Office: 225 Steidle Bldg. Office Hours: Wed. 1:30-3:30PM TA: Sameet Nabar e-mail: ssn116@psu.edu Office: 211 Steidle Bldg. Office Hours: Mon. 10AM-12 noon Instructor and TAs I will be teaching this course through 1/26/07 (when Prof. Ryba is back from China).

  4. Important Information • Meeting time and place • 12:20 PM – 1:10 PM, 121 Sparks • Textbook (recommended) • W.D. Callister, Materials Science and Engineering: An Introduction, 6th ed. • Prerequisites • E MCH 13 or E MCH 210

  5. Administrative Issues • http://www.ems.psu.edu/~ryba/ coursework/259/matse%20259.html • For the syllabus, lecture slides, announcements, example problems, etc. • Academic integrity • This course adopts the College of Earth and Mineral Science’s academic integrity policy as detailed at: http://www.ems.psu.edu/students/integrity/index.html. • Sanctions for violating the academic integrity policy will be enforced. • Special needs • If you anticipate needing any type of accommodation in this course or have questions about physical access, please tell the instructor as soon as possible.

  6. Administrative Issues • Assessment tools • Four exams (each 25% of final grade) • First three outside of class 6:30-7:45PM • Last exam during class • See web site for dates • Example Problems • Problems and solutions posted on class web site • No graded homework • Make up policy • You must contact the the instructor in advance of the exam

  7. Administrative Issues • See web site for • Course objectives • Course outcomes • Relevant book sections • Lecture Slides on web site • These slides are not “lecture notes” • Posted slides are provided to facilitate the note taking process • Posted slides are not a substitute for your own, handwritten notes or for attending lecture

  8. Materials and Engineering • What is engineering? • What is materials engineering? • Why should you care about this class? • What can we learn about engineering from materials-related failures?

  9. Engineering Design and Failure • Aloha Airlines 243 (4/28/1988) • 1 killed • Stress corrosion cracking/corrosion fatigue failure of structural aluminum after 89,680 flight cycles

  10. Engineering Design and Failure • Kansas City Hyatt Regency Bridge Collapse in Kansas City, MO (7/1981) • 114 killed, over 200 injured • Structural steel design error Scene after collapse Deformed 4th floor box beam

  11. Engineering Design and Failure James Rajotte, The Digital Collegian 9/4/2002 • Pepper Mill (9/3/2002) • No fatalities • Pepper Mill Condominiums, 710 S. Atherton St., State College, PA • Under investigation Scene after collapse.

  12. Lecture 1: Key Concepts and References • Six different property classifications of materials that determine their applicability • The three primary classifications of materials • The four components of materials engineering and their interrelationships • Steel designations • Read in Callister: • sects. 3.12, 4.3, 5.1 • pps. 261-262 • start chapter 6 • Reference: Callister, Chapter 1

  13. Engineering Properties of Materials • Mechanical • Electrical • Thermal • Magnetic • Optical • Deteriorative What are some general categories of properties of engineering materials?

  14. Components of Materials Engineering • Materials science is the study of the relationships between the structures and properties of materials • Materials engineering is the design or engineering of a material to produce the desired properties • Components of materials engineering: Callister, Materials Science and Engineering: An Introduction (2003)

  15. Structure Processing Properties Fundamental Principle of MATSE • Structure, processing, and properties are interrelated

  16. What’s in a rug? • What is it, and what is its function? • What is it made from?

  17. The Periodic Table Callister, Materials Science and Engineering: An Introduction (2003)

  18. Primary Classes of Materials • Metals (e.g. aluminum, iron, and titanium) • Ceramics (e.g. Al2O3, Fe3C, and SiC) • Polymers (e.g. acrylic, polyethylene, and nylon) • Other “classes” • Composites • Semiconductors (e.g. silicon, germanium, and SiC)

  19. Metals, Ceramics, and Polymers • Composition • Structure/Bonding • Properties Callister, Materials Science and Engineering: An Introduction (2003)

  20. Is this your design?

  21. What is the material? Looks like a materials problem!

  22. Types of Steels • 1005 1006 1008 1009 1010 1012 1015 1016 1017 • 1018 1019 1020 1021 1022 1023 1025 1026 1030 • 1034 1035 1038 1039 1040 1044 1044 1045 1046 • 1050 1060 1064 1065 1070 1074 1080 1090 1095 • 1108 1116 1117 1118 1119 1132 1137 1141 1144 1211 1212 1213 1215 1547 1548 3140 4012 1330 1335 1340 1345 4023 4027 4028 4032 4037 4042 4047 4118 4130 4140 4142 4145 4147 4150 4161 4419 4320 4340 4422 4427 4615 4620 4626 4718 4720 4815 4817 4820 5046 5060 5120 5130 5132

  23. Low and Medium Carbon Steel Nomenclature • Four digit number • First two give alloy • Second two give wt% carbon  100 • UNS number starts with G • Some alloy types • 10XX, plain carbon • 41XX, Cr + Mo • 43XX, Ni + Cr + Mo

  24. Tool and Stainless Steel Nomenclature • Tool steels • High carbon content (0.6-1.4 wt. %) • AISI code denoted by letter+number • e.g. M1, A2, etc. • UNS number starts with T • Stainless steels • >11 wt. % Cr • 3XX series, austenitic • 4XX series, ferritic and martensitic • XX-XPH, precipitation hardened • UNS number starts with S

  25. Does it matter? • Properties of hot rolled and normalized steels Type Tensile strength 1020 64.0 ksi 1030 75.5 ksi 1040 85.5 ksi 1050 108.5 ksi 1060 112.5 ksi 1080 146.5 ksi

  26. How else can steel properties be changed? Steel Tensile strength 1040 hot rolled and normalized 86 ksi 1040 quenched and tempered at 400 F 130 ksi 8640 quenched and tempered at 400 F 270 ksi (8640: Fe - 0.5%Cr - 0.5%Ni - 0.2%Mo - 0.4%C)

  27. Tensile Behavior of Steels • Features • Elastic response • Yielding behavior • Ultimate strength • Failure • Influence of alloy chemistry Popov, Engineering Mechanics of Solids (1991)

  28. What do these things do in steels? Change C content Mechanical work Heat treat Alloying elements Change “structure” Changing structure changes properties

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