Detachment of an implant from a delivery assembly can be electrolytic. A distal end of a core member and a proximal end of an implant can be joined together by one or more weld joints disposed axially between the distal end and the proximal end, the one or more weld joints being further disposed at a radially outermost periphery of the distal end and a radially outermost periphery of the proximal end. Delivery of a detachable implant as described herein can include advancing, to a target location within a patient, an implant having a proximal end and being connected to a distal end of a core member by one or more weld joints, as described above, and separating the implant from the core member by corroding the one or more weld joints.
