公开(公告)号：US10675703B2

公开(公告)日：2020-06-09

申请号：US15478684

申请日：2017-04-04

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： David Sigler ,  Blair Carlson ,  Surender Maddela

IPC: B23K11/20 ,  B23K11/11 ,  B23K11/18 ,  F16B5/08 ,  B23K103/20

Abstract: A weld joint is disclosed that weld bonds together an aluminum workpiece and a steel workpiece. The weld joint includes an aluminum weld nugget, an intermetallic layer, and an annular ring of aluminide particles that is selected from the group consisting of nickel aluminide particles, iron aluminide particles, and a combination thereof. The annular ring of aluminide particles extends upwards from a weld bond surface of the weld joint such that the annular ring of aluminide particles extends radially inwardly into the aluminum weld nugget and protects the weld bond surface of the weld joint against crack propagation that may originate from a notch root of the weld joint.

公开(公告)号：US20170291247A1

公开(公告)日：2017-10-12

申请号：US15478684

申请日：2017-04-04

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： David Sigler ,  Blair Carlson ,  Surender Maddela

IPC: B23K11/20 ,  B23K11/18 ,  F16B5/08

CPC classification number: B23K11/20 ,  B23K11/115 ,  B23K11/185 ,  B23K2103/20 ,  F16B5/08

Abstract: A weld joint is disclosed that weld bonds together an aluminum workpiece and a steel workpiece. The weld joint includes an aluminum weld nugget, an intermetallic layer, and an annular ring of aluminide particles that is selected from the group consisting of nickel aluminide particles, iron aluminide particles, and a combination thereof. The annular ring of aluminide particles extends upwards from a weld bond surface of the weld joint such that the annular ring of aluminide particles extends radially inwardly into the aluminum weld nugget and protects the weld bond surface of the weld joint against crack propagation that may originate from a notch root of the weld joint.

公开(公告)号：US20170291246A1

公开(公告)日：2017-10-12

申请号：US15478745

申请日：2017-04-04

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： David Sigler ,  Blair Carlson ,  Surender Maddela

IPC: B23K11/11 ,  B23K11/34 ,  B23K11/20

CPC classification number: B23K11/115 ,  B23K11/20 ,  B23K11/34 ,  B23K2103/20

Abstract: A method of resistance spot welding an aluminum workpiece and an adjacent overlapping steel workpiece is disclosed in which a source of a reactive metal in a diffusible state is located along a faying interface of an aluminum workpiece and an adjacent overlapping steel workpiece. The source of the reactive metal in a diffusible state may take on a variety of forms including (1) a composite adhesive layer that includes reactive particles dispersed throughout a structural thermosetting adhesive matrix or (1) a reactive alloy layer that confronts and is in proximate contact with a faying surface of the aluminum workpiece. Once the source of a reactive material in a diffusible state is in place and the workpiece stack-up is assembled, an electrical current is passed through the workpiece stack-up and between a set of opposed welding electrodes at a weld zone to ultimately produce a weld joint.