Microstructure and fatigue strength in a low-carbon martensitic stainless steel remelted by plasma torch

Henke, Sérgio Luiz; Müller, Matheus; Takano, Edson H.; Paredes, Ramón Sigifredo Cortés

doi:10.1080/09507116.2015.1096479

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2022

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“…An increasing δ-ferrite content is known to have a deleterious effect on the tensile and fracture resistance of the weld metal (WM) at cryogenic temperatures [14, 15]. In addition, the presence of δ-ferrite deteriorates the fatigue properties due to the promotion of the fatigue crack nucleation in the specimens [16]. Therefore, it is necessary to develop novel fillers with low-temperature properties to compete with STS fillers.…”

Section: Introductionmentioning

confidence: 99%

Gas tungsten arc weldability of stainless steel 304 using CoCrFeMnNi filler metals for cryogenic applications

Nam

Moon

Park³

et al. 2022

Science and Technology of Welding and Joining

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This study investigates the gas tungsten arc (GTA) weldability of austenitic stainless steel (STS) 304 using STS 308L and high-entropy alloy (HEA) fillers and its applicability in cryogenic environments. Because the grain sizes of both weld metals (WMs) were coarser than those of base metal (BM), and all WMs have a few phase transformations, the tensile properties of all WMs were worse than that of the BM. However, the tensile strength and elongation of HEA weld at 77 K increased simultaneously than those at 298 K, whereas the elongation of STS 308L weld decreased at 77 K than that at 298 K. All WMs exhibited excellent tensile strengths at 77 K, attributable to martensite transformations and deformation twins, respectively.

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Section: Introductionmentioning

confidence: 99%