Abstract
ABSTRACTAHSS DP980 is widely used in automobiles and is susceptible to hydrogen embrittlement (HE), which negatively impacts the mechanical properties of the material. The aim of this work was to prevent the DP980 steel against the HE with the help of various surface coatings. Hydrogen charging of bare and various coated samples was accomplished by electrochemical reactions at a current density of 40 mA/cm2 for 24 hours. After charging, SSRT testing was performed at a strain rate of 10−5/s. Coating characterisation was completed by Coating Porosity Test, EDX and Microhardness test. Test results stated that the Ni-Cr and Gr ACS coating effectively reduces the hydrogen diffusion inside the material with improved mechanical properties, and the HE ratio decreases from 43.3% for the bare sample to 9.6% and 7.3% for those coated samples, respectively. The microhardness test also gave a high microhardness value for these coatings. Fracture surface examination shows that the bare hydrogen charged specimen failed in a mixed-mode manner, whereas all regions of Ni-Cr and Gr ACS-coated specimen fracture surface comprise dimple rupture.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
