Does uttering "علي الطلاق إذا مزحت معاك تاني مرة" (Divorce upon me if I joke with you again) with the intention of expressing anger, not divorce, constitute a divorce, or is an expiation for breaking an oath due?

This is an oath by divorce on not joking with the wife. If the sworn-upon act occurs, divorce takes place according to the majority of scholars, and this is the fatwa given. However, if there was a reason for not joking, and that reason ceased to exist, then he joked with her, the breach of oath does not occur, and divorce does not take place.