Patent ID: 11951538
Assignee: GM GLOBAL TECHNOLOGY OPERATIONS LLC
Field: Materials, metallurgy (Chemistry)
Classification: CPC B  C | IPC B  C

Claim 10:
11. A method for fabricating a hollow automotive part, the method comprising:
forming an upper mold and a lower mold;
injecting a charge of a semi-solid aluminum slurry into each of the upper mold and the lower mold to form an upper section in the upper mold and a lower section in the lower mold, wherein each section is formed with a lowest material porosity region at a first surface and at a second surface, wherein the first surfaces are formed with first mating geometric designs, and wherein the second surfaces are formed with second mating geometric designs;
engaging the lowest material porosity regions of the upper section with the lowest material porosity regions of the lower section; and
performing a capacitive discharge welding process to weld the first surface of the upper section to the first surface of the lower section and the second surface of the upper section to the second surface of the lower section to form the hollow automotive part as a ring shape in which a closed void is surrounded by the upper section and the lower section.