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Aluminum and its Alloys
Haseeb Ullah Khan Jatoi
Department of Chemical Engineering
UET Lahore
Why Aluminum Alloys?
• Abundant element of 8% on earth crust and normally found in oxide forms (Al2O3), i.e., bauxite, kaolinite, nepheline and alunite.
• Found in United states, Italy, France.
• Have not been found in Thailand but in Malaysia, Vietnam
Bauxite Kaolinite
http://www.google.com.pk/url?sa=i&source=images&cd=&cad=rja&docid=uIq-kwH_JWIjhM&tbnid=_jiIeenfjdoTRM:&ved=0CAgQjRwwAA&url=http://geology.com/minerals/bauxite.shtml&ei=rTyDUdmIJMTprQfhuIHQAw&psig=AFQjCNGLr2CNrIg9BrvlzR1ur84J3bhK6A&ust=1367641645672370http://www.google.com.pk/url?sa=i&source=images&cd=&cad=rja&docid=9WeaWBS_sO_KbM&tbnid=HtW9_5wPq-KVxM:&ved=0CAgQjRwwAA&url=http://www.daviddarling.info/encyclopedia/K/kaolinite.html&ei=3zyDUf3dPIL3rQfQ-YDoBQ&psig=AFQjCNEe1hgZBdp9hvqDIoYc-BV7rYVTeg&ust=1367641696059120
Why Aluminum?
http://www.google.com.pk/url?sa=i&source=images&cd=&cad=rja&docid=gs6KLYhm5_9meM&tbnid=kDgL29pj3RqdmM:&ved=0CAgQjRwwAA&url=http://www.alueurope.eu/about-aluminium/production-process/&ei=9j2DUcWLHYfUrQflvYD4Cg&psig=AFQjCNFBdwt9io0TSMt80z_5FTGF6gsk2g&ust=1367641974537320
Attractive Properties
• High corrosion resistance
• Excellent machining properties
• Light weight
• High thermal/electrical conductivity
• High ductility/easily deformable
Uses of Aluminum
Uses…
http://www.google.com.pk/url?sa=i&source=images&cd=&cad=rja&docid=x6zaY_FBVau4JM&tbnid=G2cnV_JCdqm52M:&ved=0CAgQjRwwAA&url=http://www.tiptheplanet.com/wiki/Aluminium&ei=8D6DUZzQEY7LrQfD3oGYCw&psig=AFQjCNHQq0XtJ9PJUmbUql-7k8uVCfUQIA&ust=1367642224365738
http://www.google.com.pk/url?sa=i&source=images&cd=&cad=rja&docid=T6-xJt55kP6xDM&tbnid=HBviaoLUGQBkpM:&ved=0CAgQjRwwAA&url=http://www.aluminyumsanayi.com/aluwebsayfam2.html&ei=xxGHUan7EYaPrgeFm4HoBg&psig=AFQjCNH1BEjlDUvgQJkpbb-DNKzqzrPOMg&ust=1367892807358257
Wrought and cast aluminum
• An alloy that is wrought is one that is worked by being forged or hammered.
• A cast alloy is when the molten alloy is poured into a mold to give it its shape, and has very little strength.
A wrought alloy is stronger as it has been worked, pounded into shape. It may have been heated and then cooled slowly to anneal it to make it stronger. Between working it and annealing it the molecules are brought closer together giving it more strength.