Tensile Properties of Different 1Cr18Ni9Ti Steel Welded Joint at Low Temperature
The fluences of welding methods on the low temperature tensile behavior of 1Cr18Ni9Ti steel welded joint were studied by means of precise multifunction material testing system and SEM. The results show that the strength and elongation of the TIG welded joint is higher than that of the MMA at 77K. The fracture surface of 1Cr18Ni9Ti steel welded joint exhibits hybrid tough fracture of dimple and tear ridge , and dimple of the TIG welded joint fracture surface is tiny and uniform.