Gm Global Technolgoy Operations, Inc.

Richard D Ricchi

Qigui Wang

Huaxin Li

Liang Wang

Ronald John Petrus

Jared Matthew Satkowiak

Hsiao F Wong

Kenneth E Schroeder

An additive manufactured piston having a crown portion and a skirt portion form of an aluminum-cerium-silicon alloy. The piston includes a least one recess pocket in an unstressed region located at an interface between an inner surface of the crown portion and an outer surface of the skirt portion. The skirt portion includes an outer panel surface defining an external rib adjacent a peripheral end surface, at least one stiffening rib extending from a pin boss to a skirt end, and a wall thickness of between 0.2 mm and 1.0 mm in a region between the external rib and the at least one stiffening rib. The skirt portion further includes an internal first rib having a width Won a thrust side portion and an internal second rib having a width Wlocated on an anti-thrust side portion, in which Wis greater than W

Piston for use in internal combustion engines and method of making the piston

A component includes a base formed of a majority of a first metallic element and a shell adhered to the base. The shell includes an inner portion having an inner surface contacting the base, an outer portion having an outer surface, and an intermediate zone connecting the inner portion to the outer portion. The shell is formed of a multi-element transition material, where the multi-element transition material includes a majority of a second metallic element at the inner surface and a majority of a third metallic element at the outer surface. The intermediate zone includes both the second and third metallic elements. Each of the first, second, and third metallic elements are different from one another. The component may be an automotive shaft. A method of forming the component may include depositing first and second powders on the base to form the inner and outer portions and the intermediate zone.

Component having metallic transition material on base and method of forming

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Lapeer, MI, United States of America

Richard D Ricchi