Observation of hydrogen distribution in high-strength steel

摘要: “The diffusible hydrogen” in Cr-Mo steels are observed with autoradiography technique. Specimens “the prepared by an electrochemical cathodic charging method and those without annealing at 373 K after hydrogen. TEM autoradiographs suggests, the developed silver grains, that hydrogen trapping sites grain boundary internal interface of ferrite-cementite ferrite-lath structure. After keeping sample K, grains disappeared. Most release almost all K. It is clear these high-strength supplies hydrogen”. Hydrogen absorption characteristics quench hardening tempering have been evaluated thermal desorption spectrometry (TDS). From tritium electron microscopic TDS analysis, lower temperature (360 K–370 K) peaks show diffusing which released a few days. from such as or structure distinguished to hydrogen.”