There’s this fic I’m following that got some elements of it, the BARF can’t support the extent of Bucky’s trauma, no rape however, Tony centric, but includes a very interesting journey through Bucky’s mind, it’s called Terminal velocity: http://archiveofourown.org/works/6823951
If you’re looking for some good rehashing of past Bucky torture you’ll love it, especially chapter 6 through 8 :)