... embrittlement properties of steel were studied by electrochemical hydrogen charging test and scratch test. The microstructure and properties of the alloy were analyzed by hardness tester, scanning electron microscope and three-dimensional morphology. The fracture toughness before and after hydrogen charging...

.... The corrosion time was 5 min. The copper alloy surface modification metallographic under different FSSP parameter is shown in Figures 1 . Copper alloy Hardness Microstructure Corrosion resistance Friction stir surface processing National Natural Science Foundation of China 51175255...

.... Design/methodology/approach The surfaces of the samples were modified by thermal treatment at different temperatures in N₂ gas flow for an hour. Characterization of the modified surface layers was carried out by microscopic examinations, hardness and roughness tests, and X‐ray diffraction...