Proceedings of the Third International Conference on Metals & Hydrogen P21

Effects of industrial parameters on delayed fracture in hot stamped components

R. Valentini (1)1 , M.M. Tedesco (2)2 , S. Corsinovi (3)3

  • (1) 1

    Dipartamento di Ingegneria Civile e Industriale - Pisa University

  • (2) 2

    Centro Ricerche Fiat -  Fiat Chrysler Automobiles, Turin

  • (3) 3

    Letomec srl - Pisa


In consideration of the lightweight and the impact safety of cars, in recent years, hot stamping has been increasingly applied to manufacture car parts. This has driven forward the increasing use of ultra-high strength steel sheet in the automobile industry. However, when the tensile strength of steel is more than about 1200 MPa, the steel sheet is very susceptible to hydrogen induced delayed fracture.

For these reasons, hydrogen induced delayed fracture behaviour of ultra-high strength hot stamping steel components has been studied by means of mechanical delayed fracture test and diffusible hydrogen measurement using an innovative solid-state sensor.