Hydrogen trapping in high strength 0Cr16Ni5Mo martensitic stainless steel
来源期刊：中南大学学报(英文版)2015年第11期
论文作者：SUN Yong-wei CHEN Ji-zhi LIU Jun
文章页码：4128 - 4136
Key words：martensitic stainless steel; hydrogen trapping; thermal desorption spectroscopy; slow strain rate test
Abstract: Hydrogen trapping behavior has been investigated by means of thermal desorption spectroscopy (TDS) for a high strength steel after it was tempered at the temperatures of 430 °C, 500 °C and 520 °C, respectively. the loss of ductility was characterized by slow strain rate test (SSRT) and microscopic observation. It shows that with hydrogen charging the fracture feature transfers from ductile to brittle, resulting in the loss of ductility. Undeformed microstructure immediately beneath the fracture surface in charged specimen corresponds to badly ductility compared to the obviously streamline plastic deformation in uncharged specimen. The activation energies for the peaks present in the TDS analysis are calculated for all tested steel and the activation energies for all temperature peaks are similar, corresponding to the similar types of hydrogen traps.
SUN Yong-wei(孙永伟)1, CHEN Ji-zhi(陈继志)1, 2, LIU Jun(刘军)2
(1. College of Materials Science and Chemical Engineering, Harbin Engineering University, Harbin 150001, China;
2. Luoyang Ship Material Research Institute, Luoyang 471000, China)
Abstract:Hydrogen trapping behavior has been investigated by means of thermal desorption spectroscopy (TDS) for a high strength steel after it was tempered at the temperatures of 430 °C, 500 °C and 520 °C, respectively. the loss of ductility was characterized by slow strain rate test (SSRT) and microscopic observation. It shows that with hydrogen charging the fracture feature transfers from ductile to brittle, resulting in the loss of ductility. Undeformed microstructure immediately beneath the fracture surface in charged specimen corresponds to badly ductility compared to the obviously streamline plastic deformation in uncharged specimen. The activation energies for the peaks present in the TDS analysis are calculated for all tested steel and the activation energies for all temperature peaks are similar, corresponding to the similar types of hydrogen traps.
Key words:martensitic stainless steel; hydrogen trapping; thermal desorption spectroscopy; slow strain rate test
