Effect of hydrogen environment on the notched tensile properties of T-250 maraging steel annealed by laser treatment
作者： L.W Tsay , W.C Lee , W.C Luu , J.K Wu
DOI: 10.1016/S0010-938X(01)00137-8
关键词: Hydrogen 、 Intergranular fracture 、 Materials science 、 Maraging steel 、 Austenite 、 Metallurgy 、 Ultimate tensile strength 、 Stress corrosion cracking 、 Environmental stress fracture 、 Hydrogen embrittlement
摘要: In the present work, slow displacement rate tensile tests were performed to find out influence of ageing condition and hydrogen-charging on notched strength fracture characteristics T-250 maraging steel aged at various conditions. The embrittling species in environment was accessed by comparing measured properties air, gaseous hydrogen H2S-saturated solution. diffusivity, permeation flux apparent solubility specimens determined electrochemical method, correlated well with microstructures mechanical property. results indicated that peak-aged (H900) specimen highly sensitive embrittlement even hydrogen. contrast, over-aged (H1100) comprising reverted austenite incoherent precipitates could trap large amount atoms, resulting decreased permeability susceptibility. solution-annealed had highest diffusion coefficient lowest quantity trapped among specimens, showing high susceptibility sulfide stress corrosion cracking. presence notches, atoms prone segregate grain boundaries, formation intergranular fracture.
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