Fatigue Behavior of 18% Ni Maraging Steels: A Review

Rohit, Benjamin; Muktinutalapati, Nageswara Rao

doi:10.1007/s11665-021-05583-w

Cited by 23 publications

(6 citation statements)

References 42 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Reverted austenite present in the microstructure has a crack‐blunting effect and hence decreases the stress concentration at the crack tip and increases the maximum length of the non‐propagating crack, thereby increasing the fatigue limit [7, 39, 40, 41]. With the presence of austenite in the microstructure, the blunting radius is higher indicating a higher ductility at the micro level and reduced effective

{{\rm \Delta }}

K levels (stress intensity factor range).…”

Section: Discussionmentioning

confidence: 99%

Influence of reverted austenite on fatigue life of 18 % nickel maraging steel

Rohit,

Rao M

2023

Materialwissenschaft Werkst

View full text Add to dashboard Cite

Maraging steels containing 18 % nickel are based on a low‐carbon iron‐nickel‐cobalt‐molybdenum system. These steels demonstrate a remarkable combination of high strength and high toughness. To investigate the effect of overaging and resulting austenite reversion on the fatigue behavior of C250 maraging steel, specimens in the solution annealed state were overaged at 510 °C for various intervals, resulting in volume fractions of reverted austenite ranging from 2.6 % to 11.4 %. The staircase method was used to calculate the fatigue limit. S−N curves were generated by testing a minimum of four stress levels and at least three samples at each stress level. Basquin's equation was used to fit the experimental stress‐life data, and the Basquin exponent and fatigue strength coefficient were calculated. The presence of 2.6 % reverted austenite in the microstructure improved the fatigue limit and fatigue ratio, without significantly reducing tensile strength. The results can be interpreted in terms of reverted austenite having a crack blunting effect on the propagating cracks. A small amount of reverted austenite in the range of 2 %–3 % vol has a beneficial effect on the fatigue life.

show abstract

{{\rm \Delta }}

K levels (stress intensity factor range).…”

Section: Discussionmentioning

confidence: 99%

Influence of reverted austenite on fatigue life of 18 % nickel maraging steel

Rohit,

Rao M

2023

Materialwissenschaft Werkst

View full text Add to dashboard Cite

show abstract

“…However, several aging cycles can improve the tensile strength and toughness considerably, albeit with significant reductions in the ductility and impact strength [32]. The double aging treatment appears to increase the strength and fatigue strengths, especially in high-humidity conditions [33].…”

Section: Introductionmentioning

confidence: 99%

Analysis of a Double Aging Process in a Maraging 300 Steel Fabricated by Selective Laser Melting, Using the Design of Experiments Technique

Pérez-Gonzalo,

González-Pociño,

Alvarez-Antolin

et al. 2023

Metals

View full text Add to dashboard Cite

This study aims to optimize the aging treatment of a maraging 300 steel, without prior austenitizing, manufactured by the selective laser melting (SLM) technique. The study includes the analysis of a double aging process. In addition, the impact of the aging treatment on corrosion resistance in 3.5 wt.% NaCl solution was analyzed. The research technique followed was a factorial design of experiments with three factors and two levels, performing one replicate of each experiment. The results show that excellent mechanical properties can be achieved by omitting the solubilization treatment prior to aging. The highest hardness and tensile strength were achieved by performing a double aging at 460 °C for 8 h. Under these conditions, the maximum hardness exceeded 615 HV and the tensile strength was over 2140 MPa. Aging at 520 °C caused the formation of reverse austenite. The aging temperature was the only factor that had a significant effect on the formation of reverse austenite. It should be noted that the holding time at this temperature did not have a significant effect. The corrosion resistance, in 3.5 wt.% NaCl aqueous solution, increased in the aged samples compared to the as-printed sample. Samples overaged at 520 °C showed the best corrosion resistance. It can be concluded that the predominant cathodic reaction taking place is the reduction of oxygen dissolved in the electrolyte.

show abstract

“…Maraging steel is a prominent category of ultrahigh-strength steel (UHSS) characterized by a yield strength exceeding 1350 MPa and excellent comprehensive properties [1,2]. It finds wide applications in manufacturing load-bearing structural components for aerospace, navigation, energy, and other fields [3,4]. Different from traditional high-strength steel that relies on carbide strengthening, maraging steel consists of a Fe-Ni martensitic matrix in which intermetallic compounds precipitate in the supersaturated solid solution (martensite) diffusely to achieve strengthening [5][6][7].…”

Section: Introductionmentioning

confidence: 99%

Effect of Aging Treatment on the Microstructure and Properties of 2.2 GPa Tungsten-Containing Maraging Steel

Han

Liu

et al. 2023

Materials

View full text Add to dashboard Cite

Maraging steel is a prominent category of ultrahigh-strength steel (UHSS) characterized by excellent comprehensive properties, and it finds wide applications in manufacturing load-bearing structural components. In this study, a novel tungsten-containing maraging steel, C-250W, was designed. The effects of aging treatments on the mechanical properties, microstructure, precipitations, and reverted austenite of C-250W steel were investigated. The results revealed that the optimal combination of strength and toughness could be achieved through an aging treatment of C-250W steel carried out for 5 h at 480 °C after solution treatment at 1000 °C for 1 h. As the aging temperature increased, the proportion of dimples in the impact fracture gradually decreased while that of quasi-cleavage increased, leading to a reduction in Charpy impact energy. The boundary of martensitic lath decomposed gradually as the aging temperature increased, and it disappeared entirely at temperatures higher than 550 °C. Moreover, the aging process resulted in the formation of phases, including spherical Fe2M (M represents Mo, W) and thin strip-shaped Ni3N (N represents Mo, Ti) precipitates. These precipitates coarsened from 5 nm to 50–200 nm with increasing aging temperature. Additionally, the content of reverted austenite increased with the aging temperature. Within the temperature range of 400 °C to 500 °C for aging treatment, the content of film-shaped reverted austenite was approximately 3%, primarily distributed at the boundary of martensite lath. When the aging temperature exceeded 550 °C, the content of reverted austenite reached 20.2%, and its morphology changed from film-shaped to block-shaped, resulting in a decline in strength and toughness.

show abstract

Fatigue Behavior of 18% Ni Maraging Steels: A Review

Cited by 23 publications

References 42 publications

Influence of reverted austenite on fatigue life of 18 % nickel maraging steel

Influence of reverted austenite on fatigue life of 18 % nickel maraging steel

Analysis of a Double Aging Process in a Maraging 300 Steel Fabricated by Selective Laser Melting, Using the Design of Experiments Technique

Effect of Aging Treatment on the Microstructure and Properties of 2.2 GPa Tungsten-Containing Maraging Steel

Contact Info

Product

Resources

About