Structure and magnetic properties of milled maraging steel powders

Thotakura, G.V.; Goswami, R.; Jayaraman, Tanjore V.

doi:10.1016/j.powtec.2019.09.054

Cited by 4 publications

(2 citation statements)

References 31 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Present phases were identified as martensite (α-phase) and as retained austenite (γ-phase). The presence of a small amount of residual austenite has been also reported in the work of others [5,8] and is related to the preparation technique chosen for the powder production. This is because, during the rapid cooling, the residual austenite does not undergo the phase transformation into martensite.…”

Section: Characterization Of the 18ni300 Maraging Steel Powdersupporting

confidence: 59%

“…The main reason for such good mechanical properties of the maraging steels is the precipitation hardening during heat treatment, allowing to form a few types of nano-sized precipitates (Ni 3 (Mo, Ti), Fe 2 Mo) homogeneously dispersed within the material volume [5][6][7]. Due to their admirable properties, these steels have a wide range of applications, e.g., can be used for tooling components, aerospace and hydrospace industry, as well as for motor racing applications [4,[8][9][10]. Considering the good weldability, maraging steels are suitable for production not only via classical methods but also by way of modern processes, such as additive manufacturing [4,9,11,12] and powder metallurgy [13,14].…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Structure and Mechanical Properties of the 18Ni300 Maraging Steel Produced by Spark Plasma Sintering

Strakošová

Průša

Michalcová

et al. 2021

Metals

View full text Add to dashboard Cite

In this work, a new approach for compaction of the gas-atomized 18Ni300 maraging steel at two different temperatures of 1050 °C and 1150 °C using a progressive SPS technology is studied. Moreover, the influence of two heat treatments combining solution annealing and aging (SAT) and simply aging treatment (AT) on the microstructure and mechanical properties is investigated. It is found that samples compacted at 1050 °C had higher porosity compared to the almost non-porous material produced at 1150 °C. In addition, the difference of 100 °C for the compaction temperature successfully reduces the porosity from 0.86% down to 0.08%. Additionally, we discovered that the higher the compaction temperature, the higher the amount of retained γ-Fe which positively affects the ductility of the samples. The subsequential heat treatment results in precipitation strengthening via the Ni3Mo precipitates. Microhardness of the SPS1050 and SPS1150 samples increase from 303 ± 13 HV0.1 and 360 ± 5 HV0.1 to 563 ± 31 HV0.1 and 606 ± 17 HV0.1, respectively. The sample compacted at 1150 °C shows the highest ultimate tensile strengths reaching up to 1940 ± 6 MPa, while also showing 4% ductility.

show abstract

Section: Characterization Of the 18ni300 Maraging Steel Powdersupporting

confidence: 59%