Utg bets 25, BU calls and I need to pay 15 for a 65 pot so I call with 5c 4s

flop is 6c 6s 3c (78c)

I bet 40 because I don't want to get pushed out of my hand from a bigger bet

UTG calls BU folds

Turn is Kc (155c)

I bet for the same reason, and as a semi bluff

UTG calls

Turn is 9h (310c)

I check, but wondering if I can bluff here?

UTG checks and reveals JhJc

Thanks