Matse 259
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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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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

Today’s Lecture

  • Administrative issues (syllabus, etc.)

  • Introduction to materials engineering


Instructor and tas

Instructor: E. Ryba

e-mail: [email protected]

Office: 122 Steidle Bldg.

Office Hours: by appt.

TA: Youngho Jin

e-mail: [email protected]

Office: 225 Steidle Bldg.

Office Hours: Wed. 1:30-3:30PM

TA: Sameet Nabar

e-mail: [email protected]

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).


Important information

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


Administrative issues

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.


Administrative issues1

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


Administrative issues2

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


Materials and engineering

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?


Engineering design and failure

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


Engineering design and failure1

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


Engineering design and failure2

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.


Lecture 1 key concepts and references

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


Engineering properties of materials

Engineering Properties of Materials

  • Mechanical

  • Electrical

  • Thermal

  • Magnetic

  • Optical

  • Deteriorative

What are some general categories of properties of engineering materials?


Components of materials engineering

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)


Fundamental principle of matse

Structure

Processing

Properties

Fundamental Principle of MATSE

  • Structure, processing, and properties are interrelated


What s in a rug

What’s in a rug?

  • What is it, and what is its function?

  • What is it made from?


The periodic table

The Periodic Table

Callister, Materials Science and Engineering: An Introduction (2003)


Primary classes of materials

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)


Metals ceramics and polymers

Metals, Ceramics, and Polymers

  • Composition

  • Structure/Bonding

  • Properties

Callister, Materials Science and Engineering: An Introduction (2003)


Is this your design

Is this your design?


Looks like a materials problem

What is the material?

Looks like a materials problem!


Types of steels

Types of Steels

  • 100510061008100910101012101510161017

    • 101810191020102110221023102510261030

    • 103410351038103910401044104410451046

    • 105010601064106510701074108010901095

    • 110811161117111811191132113711411144 121112121213121515471548314040121330133513401345402340274028403240374042404741184130414041424145414741504161441943204340442244274615462046264718472048154817482050465060512051305132


Low and medium carbon steel nomenclature

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


Tool and stainless steel nomenclature

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


Does it matter

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


How else can steel properties be changed

How else can steel properties be changed?

SteelTensile strength

1040 hot rolled and normalized 86 ksi

1040 quenched and tempered at 400 F130 ksi

8640 quenched and tempered at 400 F270 ksi

(8640: Fe - 0.5%Cr - 0.5%Ni - 0.2%Mo - 0.4%C)


Tensile behavior of steels

Tensile Behavior of Steels

  • Features

    • Elastic response

    • Yielding behavior

    • Ultimate strength

    • Failure

  • Influence of alloy chemistry

Popov, Engineering Mechanics of Solids (1991)


What do these things do in steels

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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