Einfluss der Kaltumformung auf die Beständigkeit eines austenitischen CrNiMnMoN-Stahles gegen wasserstoffinduzierte Spannungsrisskorrosion

Research output: ThesisMaster's Thesis

Abstract

In this master thesis, the influence of cold working on the resistance to hydrogen-induced stress corrosion cracking of the material X3CrNiMnMoN 27-14-6-3 was investigated. To determine the influence of strain hardening, the starting material was cold worked to different degrees and the individual states have been tested experimentally. In order to obtain the hydrogen content as function of charging time, samples of all differently cold worked states were electrochemically charged with hydrogen for different time periods and then the hydrogen content was determined by carrier gas hot extraction. The resistance of the differently cold worked conditions to hydrogen induced stress corrosion cracking was tested by slow strain rate tests with cathodic pre-charging and continuous in-situ charging. Furthermore, constant load tests with pre charging and continuous in situ charging were performed. The results show that the initial condition has a very good resistance to hydrogen-induced stress corrosion cracking. At degrees of deformation lower than 20,0 %, the resistance decreases compared to the starting material. From degrees of deformation greater than 20,0 %, the resistance increases slightly with increasing degree of deformation.

Details

Translated title of the contributionThe influence of cold drawing on the resistance to hydrogen induced stress corrosion cracking of an austenitic CrNiMnMoN steel
Original languageGerman
QualificationDipl.-Ing.
Awarding Institution
Supervisors/Advisors
Award date31 Mar 2023
Publication statusPublished - 2023