The Terps suffered their fifth loss in the national championship game under coach John Tillman.
The Terps were dominant all game, holding the Blue Devils to a season-low five goals.
DeMaio needed just 39 seconds of overtime to claim a victory for the Terps and set a date with Duke in the semifinals.
Bernhardt's career-high eight goals and 10 points helped him become the Terps' all-time leading points scorer.
Fueled by a strong returning class and some experienced newcomers, the Terps are poised to compete at the top of the Big Ten.
Former Maryland lacrosse attackman Jared Bernhardt announces intent to play football at Ferris State
The Terps' fifth-highest goal scorer of all-time was a star quarterback at Lake Brantley High School in Florida.
Brown scored 21 goals and tallied six assists in six games this season.