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<p>[QUOTE=&quot;Pavlos, post: 3206005, member: 96635&quot;]You did doubt the authenticity by saying that in your experience the crystallization on bronze indicates that it is a cast counterfeit.</p><p><br /></p><p>EDIT:</p><p>I found a third coin with the same surface, I guess not that extremely rare anymore.</p><p><br /></p><p><img src="https://i.imgur.com/6osL8zW.jpg" class="bbCodeImage wysiwygImage" alt="" unselectable="on" /></p><p><br /></p><p>It is clear chemicals were used to remove the patina/clean causing surface etching.</p><p><br /></p><p><br /></p><p><br /></p><p>Uhm.... Do you even understand it yourself? Normally there are grain bounderies between the metals in an alloy, what they do is:</p><p><br /></p><p>“In the bulk alloy, you’d place the balls representing the components of the alloy, about 10 different elements including nickel, aluminium, chromium, tantalum and titanium, pretty randomly, and&nbsp; when you got to the gamma-prime precipitate you’d put in <span style="color: #ff4d4d">this ordered arrangement of aluminium at the corners and nickel in the middle. It’s&nbsp; all on the same regular lattice, oriented the same way, so it’s all the same crystal,</span> but you have these much stronger regions where there’s the array of gamma-prime precipitate.”</p><p><br /></p><p>They are performing no crystallization, they arrange all the crystals of those 10 elements in such a way that it becomes 1 crystal.... they are still distinct from eachother.</p><p><br /></p><p>Why do you think he says: “You can think of nickel superalloys like these as being like composites,”.</p><p><br /></p><p>A composite is nothing more then several materials constituent combined, producing a material with characteristics different from the individual components. However, <span style="color: #ff4d4d">the individual components remain separate and distinct within the finished structure.</span></p><p><br /></p><p>I have no idea what you want to proof with this because it has totally nothing to do with the CRYSTALLIZATION of an alloy.</p><p><br /></p><p>-----</p><p><br /></p><p>For the interested here, I will one time if I have time in my break measure my coin with EDS on those &#039;spots&#039;.[/QUOTE]</p><p><br /></p>

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