Page 59 - MetalForming-Apr-2018-issue

Fig. 2—The project team simulated 3rd-Gen AHSS into a baseline automotive side
structure. Its design was optimized to take advantage of improved 3rd- Gen-AHSS mechanical properties, resulting in a final design that
reduced the number of components from 46 to 28 and achieved 30-percent mass savings. The design, employing
component thicknesses of only 0.5 to 2 mm, cost- effectively met vehicle-crash and stiffness requirements.
million award from the U.S. Department of Energy (DoE) in 2012. The project’s goal: create an ICME computer model to aid the steel industry in developing 3rd-Gen AHSS used in manufacturing light- weight steel components to meet auto- motive mass savings, performance and safety requirements. The project included support by five universities, three steel companies, two engineering firms, three automotive OEMs and one
national laboratory.
New Model Tests New Steels
Because no commercial 3rd-Gen AHSS existed at the project’s onset, the team developed a microstructural model based on existing AHSS with properties similar to 3rd-Gen AHSS. This ICME model extends the full breadth of component development, from atomistic modeling to microstruc- tural modeling to vehicle/component modeling.
To validate the model, the team
Host of Benefits and Applications
To bridge the properties gap between first- and second-generation AHSS, 3rd-Gen AHSS is being devel- oped to provide a high-value steel solu- tion to automakers. This new genera- tion of steel shares the high-strength properties of AHSS along with a high total elongation similar to high- strength steels. This allows automakers to use their current stamping and assembly infrastructures.
3rd-Gen-AHSS applications in vehi- cles can include lightweighting through direct material substitution and thick-
ness reduction; improved energy absorption through enhanced strength/ elongation; and optimized geometries and part consolidation enabled by enhanced formability. Potential appli- cations identified for maximum per- formance and weight-reduction ben- efits include A and B pillars, roof rails, roof bows and underbody reinforce- ments to name a few.
Development of 3rd-Gen AHSS grew out of the Integrated Computational Materials Engineering (ICME) project, managed in collaboration with the Auto/Steel Partnership and funded in part by a competitively solicited $6
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