Gm Global Technolgoy Operations, Inc.

Mingfeng Shi

Jianfeng Wang

Qi Lu

Jason J Coryell

Sarah Tedesco

A hot formed joined blank includes a first metal blank having an ultimate tensile strength of &#x2265;about 1300 MPa to &#x2264;about 2000 MPa and defining a first surface, a second metal blank having an ultimate tensile strength of &#x2265;about 400 MPa to &#x2264;about 1200 MPa and defining a second coated surface having a coating disposed thereon. The coating includes aluminum and silicon or in alternative variations, zinc. A third surface of the second metal blank is joined to the first surface of the first metal blank to form the hot formed joined blank. A weld nugget is disposed along a boundary between the first and second metal blanks that is configured to join the first and second metal blanks, where the weld nugget optionally includes less than or equal to about 1.5 weight percent aluminum or a microstructure comprising austenite and delta-ferrite.

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Warren, MI, United States of America

Mingfeng Shi