654877bd_erials_Science_and_Engineering__Significance
[Date] 1926 [Candidate Moment] Paul Merica patents the addition of small amounts of aluminum to Ni-Cr alloy to create the first "superalloy." [Significance] 
Leads to the commercialization of the jet engine, along with increased efficiency for modern power turbine machinery.
Greatest Moments in Materials Science and Engineering
Significance