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'''Spangold''' is family of [[shape-memory alloy|shape memory-effect alloy]]s (SME) of gold, copper, and aluminum in either 18K or 23K which, when heated and cooled correctly, results in a multi-colored faceted finish which is appealing as jewelery. The name of the family is a play on the word "spangled".<ref>Liquid error: wrong number of arguments (given 1, expected 2)</ref>
Spangold is a [[beta-phase alloy]] with a nominal [[stoichiometry]] of Au7Cu5Al4 and a nominal composition by mass of 76% gold, 18% copper, and 6% aluminum. The texture is caused by the induction of a [[martensitic]]-type phase transformation on a polished surface.<ref></ref>
==References==
[[Category:Alloys]]
'''Spangold''' is family of [[shape-memory alloy|shape memory-effect alloy]]s (SME) of gold, copper, and aluminum in either 18K or 23K which, when heated and cooled correctly, results in a multi-colored faceted finish which is appealing as jewelery. The name of the family is a play on the word "spangled".<ref>Liquid error: wrong number of arguments (given 1, expected 2)</ref>
Spangold is a [[beta-phase alloy]] with a nominal [[stoichiometry]] of Au7Cu5Al4 and a nominal composition by mass of 76% gold, 18% copper, and 6% aluminum. The texture is caused by the induction of a [[martensitic]]-type phase transformation on a polished surface.<ref></ref>
==References==
[[Category:Alloys]]
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