THANK YOU to everyone who completed a CTools evaluation for our MSE250 discussion!! A ridiculous 47 out of 55 people were thoughtful enough to give feedback. | |
GSI recommendation form |
Welcome to the MSE250 Repository - a source of various informational and downloadable goodies that can help you in understanding course material and materials science in general. Enjoy your visit!
THANK YOU to everyone who completed a CTools evaluation for our MSE250 discussion!! A ridiculous 47 out of 55 people were thoughtful enough to give feedback. | |
GSI recommendation form |
Date | Lecture Content | |
2011 Oct 19 (Wed) | Failure 2 | ![]()
07:20 - Fatigue cont'd 10:57 - Fracture surface images (fractography) 19:35 - Ways to Increase Fatigue Strength 29:20 - Motivation for studying creep 31:25 - Creep 40:40 - Creep Mechanisms |
2011 Oct 21 (Fri) | Phase diagrams 1 | ![]()
00:20 - Polyphase materials 12:10 - Cu-Ni phase diagram 18:50 - solubility limit and relationship to phase composition 24:10 - solubility in solids (e.g. Cu-Ag) 37:30 - inverse lever rule |
2011 Oct 24 (Mon) | Phase diagrams 2 |
![]()
00:10 - recap/two-phase example for hypothetical alloy A-B (handout) 07:45 - phase compositions/amounts of a two-phase region at different T 09:24 - atomic vs. weight percent (Li-Pb) 12:03 - phase regions (Cu-Zn); corrosion resistance; dashed lines at low T; one-two-one rule for phase regions at any isotherm 18:30 - line compound (Mg-Pb) 20:53 - microstructure of slowly cooled binary alloys 40:55 - invariant points (Cu-Al, handout) 49:40 - how did the "invariant point" get its name? |
2011 Oct 26 (Wed) | Phase diagrams 3 / Intro. phase transformation kinetics |
![]()
00:00 - plain carbon steel phase diagram (Fig 9.24); interstitial sites of carbon in ferrite and austenite
15:11 - importance of austenite 16:51 - invariant points in steel, cast iron vs. molded steel 20:17 - terminology around pearlite eutectoid point: 24:48 - microstucture around pearlite eutectoid point 31:30 - calculating microstructure amounts using inverse lever rule 37:55 - intro. to rate effects/phase transformation kinetics 46:50 - transformation kinetics handout 51:20 - time-temperature transformation diagram (Fig 10.13) |
2011 Oct 28 (Fri) | Phase transformation kinetics 2 (steel) |
![]()
00:00 - steel time-temperature transformation diagram (Fig. 10.18) 00:55 - undercooling below the austenite eutectoid temperature / what is the T-t graph good for? 01:45 - pearlite: rapidly cool to 600°C, hold isothermally for 103 s 04:24 - pearlite microstructure (Fig. 10.15) 10:08 - bainite: rapidly cool to 450°C, hold for 100 s (bainite microstructure: Fig. 10.17) 13:33 - martensite: diffusion-less quenching (Fig. 10.22 - *assume, for this class, that cooling is fast enough that ALL austenite transforms into martensite) 15:30 - metastability, crystal structure, and microstructure of martensite (Fig. 10.21) 21:14 - examples of incomplete transformations (Fig. 10.22; mix of pearlite/bainite + martensite) 27:43 - practical uses of isothermal heat treatment 30:00 - heat treatment at 2 different temperatures (Fig. 10.24) 33:53 - reasons for martensite's huge loss of ductility; reheating to obtain tempered martensite microstructure (not on T-t diagram!) 41:55 - spheroidite (not on T-t diagram!) 45:08 - microstructure of spheroidite vs. tempered martensite (Fig. 10.19/33) |
2011 Oct 31 (Mon) | Phase transformation kinetics 3 (steel) / Precipitation hardening 1 | ![]()
00:00 - review: isothermal cooling T-t transformation diagram and microstructures for 0.76 wt.% (eutectoid) alloy (Fig. 10-22) 02:12 - isothermal T-t transformation diagram for 0.45 wt.% (hypoeutectoid) alloy (Fig. 10-39) 08:59 - isothermal T-t transformation diagram for 1.13 wt.% (hypereutectoid) alloy (Fig. 10-16) 16:05 - isothermal T-t transformation diagram for a 4340 alloy (Fig. 10-23) 17:45 - isothermal vs. continuous cooling curve for 0.76 wt.% (eutectoid) alloy (Fig. 10-26,27; class handout combines these figures) 26:38 - continuous cooling curve for 0.35 wt.% (hypoeutectoid) alloy (class handout) 30:10 - continuous cooling curve for 4340 alloy (Fig. 10-28) 32:58 - microstructure-property relationships (Fig. 10-30) - microstructures: spheroidite, coarse pearlite, fine pearlite
40:40 - comparing pearlite and martensite microstructure-property relationships (Fig. 10-32)- properties: hardness, ductility - microstructures: fine pearlite, martensite, tempered martensite
42:18 - precipitation (age) hardening in (non-ferrous) metals (Ch. 11.9)- properties: hardness (ductility discussed) 43:28 - phase diagram requirements for an alloy to be precipitation (age) hardened 45:05 - procedure for precipitation hardening |
2011 Nov 02 (Wed) | Precipitation hardening 2 / Ceramics 1 | ![]()
00:00 - review of precipitation hardening 06:30 - precipitation hardening of Cu-Al (Fig. 11.24-25) 13:15 - "practical range" of precipitation hardening 17:15 - precipitation hardening synthesis-property relationships for a 2014 Al alloy (Fig. 11.27) 25:20 - introduction to ceramics 33:28 - bonding in ceramics 35:45 - general characteristics of ceramics 39:45 - properties of ionic crystalline ceramics |
2011 Nov 04 (Fri) | Ceramics 2 |
![]()
00:00 - ionic ceramic crystal structures 00:00 - AX crystal structures (zincblende, NaCl structure, CsCl structure) 04:40 - AmXp structures (CaF2, Al2O3) 08:54 - AmBnXp (Ba2TiO4) 12:04 - covalent ceramic crystal structures (e.g. GaAs) 16:00 - silicate(SiO4)-based ceramics 20:10 - clays (aluminosilicates) 20:33 - difference between silica, silicon, and silicone 21:15 - glasses 24:00 - carbon-based ceramics (diamond cubic structure, graphite, buckyball) 26:06 - defects in ceramics 28:45 - properties of ceramics: why are ceramics brittle? (*very important*) |
2011 Nov 07 (Mon) | Ceramics 3 |
![]()
00:00 - mechanical properties of ceramics (fracture vs. yield strength, tensile vs. compressive loading; 4-point bending) 08:14 - factors affecting strength of ceramics 15:55 - relationships between stiffness/strength and porosity/size of specimen 18:45 - plane strain fracture toughness of ceramics 20;32 - ZrO2 (zirconia) Y2O3 (yttria) alloy; stress-induced phase transformation 24:18 - thermal properties of ceramics - e.g. why fused silica fibers are use for space shuttle tiles
38:00 - hardness and wear resistance of ceramics- why metals have a higher coefficient of friction than covalent or ionic ceramics
43:00 - electrical properties of ceramics- adsorption (ionic ceramics) vs. absorption (sponge) 44:50 - comparing volume vs. T of crystalline and non-crystalline (amorphous) materials - viscosity discussion |
2011 Nov 09 (Wed) | Ceramics 4 / Bioceramics |
![]() |
2011 Nov 10 (Thu) | Pre-Exam 2 Review |
![]()
Audience questions • How are point defects different in ceramics vs. in metals? • Why does failure occur first at flaws in ceramics? Precipitation hardening: what is the difference between the theta, theta-prime, theta-double prime phases (e.g. Cu-Be)? • Precipitation hardening: can you precipitation-harden iron-carbide alloy? • Difference between precipitation hardening and tempering • In precipitation hardening: what is age hardening? • If we start from martensite, what is the difference between getting tempered martensite and spheroidite? Glass transition temperature vs. melting temperature, volume change • Is there ever a direct transition from liquid to solid for amorphous materials? • What does it mean if you're given the melting temperature for an amorphous material? • What is shot peening? • What to know for creep mechanisms? TTT: "resetting the clock" • Does the stress magnification at a crack apply for ductile or brittle materials, or both? • What is the difference in microstructure between eutectic and eutectoid? • Microstructure talk... • In continuous cooling, will we be given the rate of cooling (e.g. 140 C/s)? • What is the microstructure when you go through a peritectic/peritectoid point? • Why is there no stress perpendicular to the surfaces (plane strain/stress)? • What is nucleation? • On the ductile-to-brittle transition graph, what does the y-axis (impact energy) mean? • BCC, HCP, FCC ductile-to-brittle transition behavior • Is electronegativity the primary way to determine ionic or covalent bonding? • What are the concepts behind the different stages of creep? |
2011 Nov 14 (Mon) | Polymers 1 |
![]()
00:00 - introduction to polymers 03:15 - bond angle of carbon backbone 05:00 - 24:00 - examples of common polymers (Table 14.3) 09:50 - structure-property relationship: chain mobility vs. Tg 24:42 - molecular structures of polymers 34:59 - elastomers 46:53 - vulcanization to obtain elasticity of rubber |
2011 Nov 16 (Wed) | Polymers 2 |
![]()
00:00 - review of thermoplast, thermoset, elastomer characteristics 02:22 - molecular weight 05:00 - effect of molecular weight on properties 12:12 - tacticity 15:26 - copolymers 19:50 - copolymer example: thermoplastic elastomer (block styrene-butadiene, Fig. 15.22) 22:19 - crystallinity in polymers (thermoplasts only) 26:28 - effect of crystallinity on properties I 28:02 - factors that affect crystallinity (handout) 37:25 - example: branched atactic PS vs. linear isotactic PP 42:16 - effect of crystallinity on properties II 46:18 - stress-strain diagram for a simple thermoplast |
2011 Nov 18 (Fri) |
00:00 - stress-strain diagram of a "simple" thermoplast (ex: plastic bag) 05:18 - plastic deformation of a thermoplast 06:43 - effect of temperature on thermoplast properties (ex: PMMA, Fig. 15.3) 8:53 - stress-strain diagram of an elastomer; dependence on cross-linking 11:36 - stress-strain of a thermoset 12:36 - elastomer example, part 1: racketball above Tg 13:28 - strengths of metals vs. polymers 14:32 - factors affecting Tg and Tm 19:40 - Tg and Tm of common thermoplasts 22:08 - ice cube tray vs. coffee cup 25:54 - Tg (useful temperature range) of common elastomers (Table 15.4) 26:57 - elastomer example, part 2: racketball below Tg 29:42 - viscoelasticity 33:36 - viscoelastic example: picnic knife 36:26 - stress relaxation 36:26 - constant-strain loading; relaxation modulus, ER(t)
42:22 - viscoelasticity example: silly putty41:14 - constant-stress loading; creep modulus, EC(t) 47:56 - effect of strain rate on stress-strain characteristics 50:00 - effect of temperature on stiffness (ER(t)) | |
2011 Nov 21 (Mon) | Polymers 4 / Composites 1 |
![]()
00:00 - review of modulus vs. temperature for thermoplasts and elastomers 02:00 - fatigue of polymers 03:05 - crazing 06:30 - composites: motivation (ex: pole vault) 11:08 - definitions 14:56 - other examples of composites from sports 16:34 - overview of composite types particle-reinforced composites 18:50 - large-particle composites 19:10 - rule of mixtures
39:39 - cermets (ex: bandsaw blades)24:07 - concrete 41:56 - elastomer or plastic composites 43:45 - dispersion strengthened composites |
2011 Nov 23 (Wed) | Composites 2 |
![]()
fiber-reinforced composites 02:50 - specific strength, specific stiffness/modulus, and specific gravity 08:06 - definition of density of composites, ρc 10:43 - specific strength vs. specific modulus for metals and fiber composites 18:05 - importance of using fibers with thin dimensions 30:47 - fiber characteristics 34:39 - role of the matrix 36:36 - stresses in a fiber reinforced composite and the critical length |
2011 Nov 25 (Fri) | Composites 3 |
![]()
00:00 - review of critical fiber length 00:49 - fiber-matrix interfacial bonding 05:46 - strength of fiber-reinforced composites 22:13 - stiffness of fiber-reinforced composites 27:05 - 3 common fibers (glass, carbon/graphite, aramid/Kevlar) 42:33 - laminate composites 45:15 - sandwich panels |
2011 Nov 30 (Wed) | Corrosion 1 |
![]() |
2011 Dec 02 (Fri) | Corrosion 2 |
![]()
If anyone happens to listen to this, could you kindly email me the timing annotations, like I've done for all previous lectures? I'm sure everyone would appreciate it...
|
2011 Dec 05 (Mon) | Electrical Properties 1 |
![]()
If anyone happens to listen to this, could you kindly email me the timing annotations, like I've done for all previous lectures? I'm sure everyone would appreciate it...
|
2011 Dec 07 (Wed) | Electrical Properties 2 |
![]()
If anyone happens to listen to this, could you kindly email me the timing annotations, like I've done for all previous lectures? I'm sure everyone would appreciate it...
|
2011 Dec 09 (Fri) | Biomaterials 1 |
![]()
If anyone happens to listen to this, could you kindly email me the timing annotations, like I've done for all previous lectures? I'm sure everyone would appreciate it...
|
2011 Dec 12 (Mon) | Biomaterials 2 - Last day of class |
![]() |
Aaron
Email: tanaaron@umich.edu
Chat: aaron.c.tan.music@gmail.com
Office: 2076 Dow
Office hours: 2:30-4:30pm Thursdays, CSE 1637; 4:30-6:30pm Thursdays, 2076 Dow
Dr. Wynarsky
Email: wynarsky@engin.umich.edu
Office: 2042 Dow
Office hours: after 4pm, Tuesdays and Thursdays, in front of 1504 GGB