Editing Duralumin (section)

== History ==
Duralumin was developed by the German metallurgist [[Alfred Wilm]] at private military-industrial laboratory {{Ill|Zentralstelle für wissenschaftlich-technische Untersuchungen|de}} (Center for Scientific-Technical Research) in [[Neubabelsberg]]. In 1903, Wilm discovered that after [[quenching]], an [[aluminium alloy]] containing 4% copper would harden when left at room temperature for several days. Further improvements led to the introduction of duralumin in 1909.<ref>J. Dwight. ''Aluminium Design and Construction''. Routledge, 1999.</ref> The name, [[Generic trademark|originally a trade mark]] of Dürener Metallwerke [[Aktiengesellschaft|AG]] which acquired Wilm's patents and commercialized the material, is mainly used in [[popular science|pop-science]] to describe all [[Al-Cu alloys]] system, or '2000' series, as designated through the international alloy designation system originally created in 1970 by the [[Aluminum Association]].