Third generation advanced high strength steels (AHSS) that rely on the transformation of austenite to martensite have gained growing interest for implementation into vehicle architectures. Previous studies have identified a dependency of the rate of austenite decomposition on the amount of strain and the associated strain path imposed on the sheet. The rate and amount of austenite transformation can impact the work hardening behavior and tensile properties. However, a deeper understanding of the impact on toughness, and thus crash performance, is not fully developed. In this study, the strain path and strain amounts were systematically controlled to understand the associated correlation to impact toughness in the end application condition (strained and baked). Impact toughness was evaluated using an instrumented Charpy machine with a single sheet v-notch sample configuration. The instrumented striker provides a load - displacement curve as well as a total impact energy measurement, which is the integration of the load - displacement curve. Using these measurements, this study intends to understand any potential correlation between amount of retained austenite transformation, through the varying of strain paths and amount of strain, and resulting impact toughness after paint bake.


    Access

    Check access

    Check availability in my library

    Order at Subito €


    Export, share and cite



    Title :

    Strain Amount and Strain Path Effects on Instrumented Charpy Toughness of Baked Third Generation Advanced High Strength Steels


    Additional title:

    Sae Technical Papers


    Contributors:

    Conference:

    SAE WCX Digital Summit ; 2021



    Publication date :

    2021-04-06




    Type of media :

    Conference paper


    Type of material :

    Print


    Language :

    English




    Strain Amount and Strain Path Effects on Instrumented Charpy Toughness of Baked Third Generation Advanced High Strength Steels

    Hodges, Adam D. / Tedesco, Sarah / Anderson, Shane M. et al. | British Library Conference Proceedings | 2021


    Effective grain size and charpy impact properties of high-toughness X70 pipeline steels

    Hwang, Byoungchul / Kim, Yang Gon / Lee, Sunghak et al. | Tema Archive | 2005


    High Strain Rate Tensile Behavior of 1180MPa Grade Advanced High Strength Steels

    Enloe, Charles / Hector, Louis / Alturk, Rakan et al. | SAE Technical Papers | 2020


    Strain Rate Effect on Forming Limit Diagram for Advanced High Strength Steels

    Lin, Jianping / Lin, Li / Sun, Li et al. | SAE Technical Papers | 2014


    High Strain Rate Deformation Behavior of Advanced High Strength Steels for Automotive Applications

    Hassani, Farid / Nemes, James / Qu, Jinbo et al. | SAE Technical Papers | 2006