Topic
Maraging steel
About: Maraging steel is a research topic. Over the lifetime, 1728 publications have been published within this topic receiving 19886 citations. The topic is also known as: martensitic ageing steel.
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TL;DR: Cylindrical steel pressure vessels are described that can be used for hydrostatic pressures up to 50 kilobars, and are much easier to use than the more usual compound vessels with a tungsten carbide inner and steel outer vessel.
Abstract: Cylindrical steel pressure vessels are described that can be used for hydrostatic pressures up to 50 kilobars. Monoblock vessels of 350 maraging steel can be used to 40 kilobars and compound vessels with an inner vessel of 350 maraging steel and an outer vessel of 300 maraging steel to 50 kilobars. Neither requires the cylinder to be end loaded, and so they are much easier to use than the more usual compound vessels with a tungsten carbide inner and steel outer vessel.
12 citations
TL;DR: In this paper, an embrittled 18 Ni maraging steel ring was examined and samples cut from the ring were subjected to a wide range of heat treatments including high temperature solutioning and thermal cycling.
Abstract: An embrittled 18 Ni maraging steel rolled ring was examined and samples cut from the ring were subjected to a wide range of heat treatments including high temperature solutioning and thermal cycling. The effects of these treatments on toughness were evaluated by measuring impact energy and plain strain fracture toughness. The microstructural analyses were carried out using extensive optical and scanning electron microscopy, and scanning electron fractography. It has been established that the ring was embrittled due to the combined effects of deformed structure and grain boundary precipitation of TiC or Ti (CN). Heat treatment parameters have been devised to improve the fracture toughness and grain size of the materials affected by these two types of embrittlement. It has been suggested that toughness and grain size can be improved by (a) annealing at 1223 K followed by water quenching in the case where deterioration in toughness is marginal and is caused by nonrecrystallized grains or deformation texture, and (b) solutioning at 1473 K followed by water quenching, and thermal cycling twice between room temperature and 1198 K with a holding time of 30 min at peak temperature in the case where the loss in toughness is considerably large due to excessive grain boundary precipitation of second phase particles.
12 citations
TL;DR: In this paper, a detailed study was conducted to investigate the problem and segregate the faulty components in the initial stage and concluded that the chemical inhomogeneity at micro-scale gave rise to undesirable multiphase structure, which is responsible for bending during the machining stage.
12 citations
TL;DR: In this paper, the maximum permissible levels of rolling deformation in the direction of reinforcement were determined for these composites during both their fabrication and subsequent rolling sequences using the previously developed formability criteria.
12 citations
TL;DR: In this article, the effect of different filler materials and composition of the filler material were also investigated to understand the SCC behavior for the weldment of 18 Ni maraging steel.
12 citations