It's going to depend, a big part of deciding to barrel the turn would depend on the turn card and if it connects with your perceived range.
For example if you cbet a flop of 259 and get called and the turn is an A/K/Q then its a great scare card to fire a 2nd barrel because as a preflop raiser your perceived range will often be high value cards and if the opponent did have a piece of the flop then they would now figure they are behind.