I don't have any problems with that...so long as it makes some basic common sense. If you want to cut off chunks of him, then have them slice at appropriate joint locations. He's locked into a contraption - that would have been easy enough to do, slicing off his hands at the wrist or some such thing. Showing that he can lose body parts at the joints between bones could add an element of weakness to Logan. Or, have the claws put into some kind of admantium melting solution that could liquify and store the metal. Maybe Wolvie has to agonizingly break off his melting bone claws as the admantium melts off to avoid being completed smelted to death. I'm sure there are dozens of ways to introduce danger for the character without introducing something so simple and outright implausible as a "heated sword."