— This is a new method of
resistance spot welding of
aluminum alloy and advanced high strength steel that creates a stronger bond by using a chromium-rich interlayer. The interlayer improves joint strength, ductility, and toughness compared to traditional methods.
Resistance welding is used to combine two metals at one point. This technique is used extensively in automotive manufacturing, combining an aluminum (Al) to an advanced high strength steel (AHSS) structure. Welding Al and AHSS together directly, however, does not create a high-quality bond, due to…