the ability to learn is a gift the capacity to learn is a skill the willingness to learn is a choice...
DESCRIPTION
The ability to learn is a gift The capacity to learn is a skill The willingness to learn is a choice - Rebec of Ginaz. tensile. yield. tensile/yield. Re: question from last class - Mech prop data for annealed plain carbon steels. Also from last class: Densities of some materials: - PowerPoint PPT PresentationTRANSCRIPT
![Page 1: The ability to learn is a gift The capacity to learn is a skill The willingness to learn is a choice - Rebec of Ginaz](https://reader036.vdocuments.us/reader036/viewer/2022081604/5681682e550346895dddcc3c/html5/thumbnails/1.jpg)
The ability to learn is a giftThe capacity to learn is a skillThe willingness to learn is a choice
- Rebec of Ginaz
![Page 2: The ability to learn is a gift The capacity to learn is a skill The willingness to learn is a choice - Rebec of Ginaz](https://reader036.vdocuments.us/reader036/viewer/2022081604/5681682e550346895dddcc3c/html5/thumbnails/2.jpg)
Re: question from last class -Mech prop data for annealedplain carbon steels
0
10
20
30
40
50
60
70
80
90
100
0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9% C
Yield or tensile stress
tensile
yield
tensile/yield
![Page 3: The ability to learn is a gift The capacity to learn is a skill The willingness to learn is a choice - Rebec of Ginaz](https://reader036.vdocuments.us/reader036/viewer/2022081604/5681682e550346895dddcc3c/html5/thumbnails/3.jpg)
Also from last class:
Densities of some materials:
Al alloys 2.63-2.82 gm/cm3
steels 6.92-9.13Ti alloys 4.43-4.70Mg alloys 1.77-1.78Cu alloys 7.47-8.94glasses 2.4-2.7HDPE 0.96PMMA 1.22epoxies 1.25
![Page 4: The ability to learn is a gift The capacity to learn is a skill The willingness to learn is a choice - Rebec of Ginaz](https://reader036.vdocuments.us/reader036/viewer/2022081604/5681682e550346895dddcc3c/html5/thumbnails/4.jpg)
Lotus versatile vehicle architecture system (VVA)
Al???
Almost completely "aluminum" - high pressure die-castings, stampings, and extrusions
Advanced Materials & Processes, July 2005, p 29
![Page 5: The ability to learn is a gift The capacity to learn is a skill The willingness to learn is a choice - Rebec of Ginaz](https://reader036.vdocuments.us/reader036/viewer/2022081604/5681682e550346895dddcc3c/html5/thumbnails/5.jpg)
1050 1145 2014 2024 2219 2618 3003 3004 3105 4032 4043 5005 5052 5083 5154 5182 5262 5652 6010 6061 6262 6463 7005 7050 7072 7075 7175 7178 7475 7229
.
.
.
OK…..which "aluminum" is it?
![Page 6: The ability to learn is a gift The capacity to learn is a skill The willingness to learn is a choice - Rebec of Ginaz](https://reader036.vdocuments.us/reader036/viewer/2022081604/5681682e550346895dddcc3c/html5/thumbnails/6.jpg)
1050 1145 2014 2024 2219 2618 3003 3004 3105 4032 4043 5005 5052 5083 5154 5182 5262 5652 6010 6061 6262 6463 7005 7050 7072 7075 7175 7178 7475 7229
OK…..which "aluminum" is it?
Alloy designation NOT same as steels
In fact, no carbon at all in ordinary Al alloys
Does NOT contain 0.61% carbon
![Page 7: The ability to learn is a gift The capacity to learn is a skill The willingness to learn is a choice - Rebec of Ginaz](https://reader036.vdocuments.us/reader036/viewer/2022081604/5681682e550346895dddcc3c/html5/thumbnails/7.jpg)
1050 1145 2014 2024 2219 2618 3003 3004 3105 4032 4043 5005 5052 5083 5154 5182 5262 5652 6010 6061 6262 6463 7005 7050 7072 7075 7175 7178 7475 7229
![Page 8: The ability to learn is a gift The capacity to learn is a skill The willingness to learn is a choice - Rebec of Ginaz](https://reader036.vdocuments.us/reader036/viewer/2022081604/5681682e550346895dddcc3c/html5/thumbnails/8.jpg)
Number Major alloy addition
1xxx -2xxx Cu3xxx Mn4xxx Si5xxx Mg6xxx Mg & Si7xxx Zn8xxx other
Here’s the scoop -
![Page 9: The ability to learn is a gift The capacity to learn is a skill The willingness to learn is a choice - Rebec of Ginaz](https://reader036.vdocuments.us/reader036/viewer/2022081604/5681682e550346895dddcc3c/html5/thumbnails/9.jpg)
Al alloy containing 4.4% Cu (say 2024) can be heat treated to strength level much higher than that of pure Al
So, does alloying affect the properties?
Yield strength Tensile strength
Low-strength 30 ksi 60 ksi steel
Pure aluminum 5 ksi 13 ksi
Al alloy 2024-T4 47 ksi 68 ksi
![Page 10: The ability to learn is a gift The capacity to learn is a skill The willingness to learn is a choice - Rebec of Ginaz](https://reader036.vdocuments.us/reader036/viewer/2022081604/5681682e550346895dddcc3c/html5/thumbnails/10.jpg)
Al alloy containing 4.4% Cu (say 2024) can be heat treated to strength level much higher than that of pure Al
So, does alloying affect the properties?
Yield strength Tensile strength
Low-strength 30 ksi 60 ksi steel
Pure aluminum 5 ksi 13 ksi
Al alloy 2024-T4 47 ksi 68 ksi
What’s this??
![Page 11: The ability to learn is a gift The capacity to learn is a skill The willingness to learn is a choice - Rebec of Ginaz](https://reader036.vdocuments.us/reader036/viewer/2022081604/5681682e550346895dddcc3c/html5/thumbnails/11.jpg)
T4 designates a heat treatment (Al alloys only)
"solution heat-treated, quenched, and naturally aged to a substantially stable condition"
![Page 12: The ability to learn is a gift The capacity to learn is a skill The willingness to learn is a choice - Rebec of Ginaz](https://reader036.vdocuments.us/reader036/viewer/2022081604/5681682e550346895dddcc3c/html5/thumbnails/12.jpg)
T4 designates a heat treatment (Al alloys only)
"solution heat-treated, quenched, and naturally aged to a substantially stable condition"
How do we know this works?…….& why does it make the material stronger?
![Page 13: The ability to learn is a gift The capacity to learn is a skill The willingness to learn is a choice - Rebec of Ginaz](https://reader036.vdocuments.us/reader036/viewer/2022081604/5681682e550346895dddcc3c/html5/thumbnails/13.jpg)
How do we know it works?
We consult a road map for the material system
A portion of the Al-Cu"phase diagram"
![Page 14: The ability to learn is a gift The capacity to learn is a skill The willingness to learn is a choice - Rebec of Ginaz](https://reader036.vdocuments.us/reader036/viewer/2022081604/5681682e550346895dddcc3c/html5/thumbnails/14.jpg)
We have a nomenclature problem
![Page 15: The ability to learn is a gift The capacity to learn is a skill The willingness to learn is a choice - Rebec of Ginaz](https://reader036.vdocuments.us/reader036/viewer/2022081604/5681682e550346895dddcc3c/html5/thumbnails/15.jpg)
A new concept - the solid solution
![Page 16: The ability to learn is a gift The capacity to learn is a skill The willingness to learn is a choice - Rebec of Ginaz](https://reader036.vdocuments.us/reader036/viewer/2022081604/5681682e550346895dddcc3c/html5/thumbnails/16.jpg)
A new concept - the solid solution
![Page 17: The ability to learn is a gift The capacity to learn is a skill The willingness to learn is a choice - Rebec of Ginaz](https://reader036.vdocuments.us/reader036/viewer/2022081604/5681682e550346895dddcc3c/html5/thumbnails/17.jpg)
A new concept - the solid solution
![Page 18: The ability to learn is a gift The capacity to learn is a skill The willingness to learn is a choice - Rebec of Ginaz](https://reader036.vdocuments.us/reader036/viewer/2022081604/5681682e550346895dddcc3c/html5/thumbnails/18.jpg)
A new concept - the solid solution
![Page 19: The ability to learn is a gift The capacity to learn is a skill The willingness to learn is a choice - Rebec of Ginaz](https://reader036.vdocuments.us/reader036/viewer/2022081604/5681682e550346895dddcc3c/html5/thumbnails/19.jpg)
A new concept - the solid solution
![Page 20: The ability to learn is a gift The capacity to learn is a skill The willingness to learn is a choice - Rebec of Ginaz](https://reader036.vdocuments.us/reader036/viewer/2022081604/5681682e550346895dddcc3c/html5/thumbnails/20.jpg)
A new concept - the solid solution
![Page 21: The ability to learn is a gift The capacity to learn is a skill The willingness to learn is a choice - Rebec of Ginaz](https://reader036.vdocuments.us/reader036/viewer/2022081604/5681682e550346895dddcc3c/html5/thumbnails/21.jpg)
A new concept - the solid solution
![Page 22: The ability to learn is a gift The capacity to learn is a skill The willingness to learn is a choice - Rebec of Ginaz](https://reader036.vdocuments.us/reader036/viewer/2022081604/5681682e550346895dddcc3c/html5/thumbnails/22.jpg)
A new concept - the solid solution
![Page 23: The ability to learn is a gift The capacity to learn is a skill The willingness to learn is a choice - Rebec of Ginaz](https://reader036.vdocuments.us/reader036/viewer/2022081604/5681682e550346895dddcc3c/html5/thumbnails/23.jpg)
A new concept - the solid solution
A single Cu-Zn alloy is formed
Then, where are the Zn atoms??