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<p>In the temperature range of 293–773 K, the effect of hydrogen at pressures up to 30 MPa on the lowcycle fatigue life, short-term strength, and ductility of smooth and notched specimens made of forged 03Kh12N10MT and cast 03Kh12N10MT-L and 03Kh13N5M5K9 austenitic-martensitic steels after standard heat treatment and simulation of a brazing regime for 20 min at 1273 K. It was established that the most sensitive properties to hydrogen exposure are low-cycle fatigue life, the tensile strength of notched specimens, and the relative transverse reduction of smooth and notched specimens. Simulation of brazing conditions slightly alters these properties of steels in a neutral environment (air or helium) but exacerbates hydrogen embrittlement. Alloying with cobalt and molybdenum increases the strength of the least hydrogen-sensitive steel 03Kh13N5M5K9 and reduces the relative transverse reduction of smooth specimens by 7.4 times (standard heat treatment) and 11.8 times (simulated brazing) at room temperature and by a factor of 1.5 at 723 K after both heat treatments. A significant effect of hydrogen on the mechanical properties of steels 03Kh12N10MT and 03Kh12N10MT-L was observed in the temperature range of 293–673 K.</p>

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Effect of Soldering Process Parameters on Hydrogen Embrittlement of Austenitic-Martensitic Steels

  • 期刊论文

  • 发表日期：

    2026年5月28日

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  • O. I. Balytskyi,
  • L. M. Ivaskevych

摘要

In the temperature range of 293–773 K, the effect of hydrogen at pressures up to 30 MPa on the lowcycle fatigue life, short-term strength, and ductility of smooth and notched specimens made of forged 03Kh12N10MT and cast 03Kh12N10MT-L and 03Kh13N5M5K9 austenitic-martensitic steels after standard heat treatment and simulation of a brazing regime for 20 min at 1273 K. It was established that the most sensitive properties to hydrogen exposure are low-cycle fatigue life, the tensile strength of notched specimens, and the relative transverse reduction of smooth and notched specimens. Simulation of brazing conditions slightly alters these properties of steels in a neutral environment (air or helium) but exacerbates hydrogen embrittlement. Alloying with cobalt and molybdenum increases the strength of the least hydrogen-sensitive steel 03Kh13N5M5K9 and reduces the relative transverse reduction of smooth specimens by 7.4 times (standard heat treatment) and 11.8 times (simulated brazing) at room temperature and by a factor of 1.5 at 723 K after both heat treatments. A significant effect of hydrogen on the mechanical properties of steels 03Kh12N10MT and 03Kh12N10MT-L was observed in the temperature range of 293–673 K.