This CWA describes a single-specimen testing procedure for the evaluation of a cracking resistance index (CRI) for AHSS sheets with thicknesses between 0,5 mm and 3,0 mm.
NOTE 1 The test method provides an estimated measure of the fracture resistance of thin AHSS in the presence of a crack.
NOTE 2 The proposed CRI must be used only as a fracture toughness index for material screening.
NOTE 3 The suitability of the test to estimate the cracking sensitivity of AHSS has been evidenced in a previous work by establishing a good correlation between the CRI, the EWF and the Hole Expansion Ratio (HER) for a wide range of multiphase AHSS grades [14].
NOTE 4 It must be emphasized that the results of the test are greatly affected by the specimen thickness. Therefore, it is recommended the use of specimens with similar thicknesses for comparative purposes.
PUBLISHED
CWA 18012:2023
60.60
Standard published
Jul 5, 2023
