CPC B23K 11/20 (2013.01) [A61M 25/09 (2013.01); B23K 11/00 (2013.01); B23K 11/04 (2013.01); A61M 2025/09108 (2013.01); A61M 2025/09133 (2013.01); B23K 2101/32 (2018.08); B23K 2103/02 (2018.08); B23K 2103/05 (2018.08); B23K 2103/14 (2018.08); B23K 2103/26 (2018.08)] | 20 Claims |
1. A method for joining members of different metallic materials, the method comprising:
(a) providing multiple initially separate members, which members comprise different metallic materials;
(b) preparing corresponding ends of the multiple initially separate members by either flattening and/or smoothing the corresponding ends;
(c) aligning the initially separate members to result in abutting aligned members;
(d) applying a first axial baseline force to the abutting aligned members to press the abutting aligned members together, while delivering electrical current through the abutting aligned members to weld the abutting aligned members to one another; and
(e) increasing the amount of applied axial force from a value of the first axial baseline force in (d) to an increased amount of applied axial force in (e) the increased axial force being a follow up axial force that is greater than the first axial baseline force so as to produce a weld nugget having a heat affected zone where toward a center of the weld the heat affected zone comprises a first thickness across the interface of the weld that is less than a second thickness across the interface of the weld at a location towards a perimeter of the weld.
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