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  #11  
Old 09-02-2013, 07:12 PM
Wayne Gillispie Wayne Gillispie is offline
 
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Aluminum alloy is an extremely complex structure, often comprising between six to nine different metal elements. In a molten state, during alloy production, some elements are dissolved in others (like cream in coffee) and some are not (like oil in water). As the molten alloy begins to cool a point will be reached when solidification begins. At that point ?crystals? begin to form and, as cooling continues, more crystals develop, building on the first to form a metallic grain structure. Other compounds may also form within the alloy as it cools, some dissolved within the grain structure and others between the grains, along grain boundaries. The malleability, ductility and strength of the alloy are all dependent on the nature of the final alloy grain structure. The grain can be seen by viewing off the shelf sheet and noting the direction of visible lines running end to end. Bends should be made perpendicular to the grain direction.
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  #12  
Old 09-03-2013, 06:11 AM
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Jerry Fischer Jerry Fischer is offline
 
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Wayne,
That's probably the best layman's explaination of how how aluminum is made that I've ever read, thanks.
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  #13  
Old 09-03-2013, 07:13 AM
BonitaRV8 BonitaRV8 is offline
 
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Looks to me like a mark made whent he two parts touched when it was initially bent?
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  #14  
Old 09-03-2013, 02:32 PM
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Perhaps macro mode is good for this type of shot, if your camera will do it.
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  #15  
Old 09-03-2013, 05:40 PM
jwilbur jwilbur is offline
 
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Quote:
Originally Posted by BonitaRV8 View Post
Looks to me like a mark made whent he two parts touched when it was initially bent?
This is what Sterling Langrell from Van's support thought also, but said he couldn't be 100% sure and it might be worth replacing if only for peace of mind. I think I'll leave it alone until I finish the bottom skins and re-examine after I get my mind on something else for a little while. Fresh perspective and all that.

Thanks everyone for your comments. And +1 on Wayne's explanation of Aluminum. That was very instructive.
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