Engineers from NanoSteel Company Inc., Providence, R.I., described “Strengthening of 3rd-Generation Advanced High Strength Steel during Cold Stamping,” at the ASM International MS&T 2019 conference in Portland, Ore.
Extensive development of advanced high strength steel (AHSS) over the past decade is driven by the demand from the automotive industry for stronger materials that can enable lightweighting to meet increasing fuel efficiency requirements. However, achievement of higher strength in many AHSS grades comes with reduction in ductility and formability. This reduction in cold formability diminishes the benefits of AHSS, resulting in constraints, limiting geometric complexity and the ability to lightweight, while maintaining stiffness through geometric design.
NanoSteel 3rd Generation AHSS overcomes this trade-off in ductility, due to structural changes through a novel complex mechanism leading to material strengthening during metal stamping, while retaining a significant ductility for energy absorption during a crash event. The specific characteristics of this mechanism was detailed in this presentation, including structure and property evolution during stamping as well as non-destructive approaches to model and predict yield strength values in actual stampings.
Title: Strengthening of 3rd Generation AHSS during Cold Stamping
Authors: Daniel Branagan; Craig Parsons, Tad Machrowicz, Jonathan Cischke, Andrew Frerichs, Brian Meacham, Sheng Cheng, Alla Sergueeva, NanoSteel Company Inc. www.nanosteelco.com
