The phase transitions in selective laser-melted 18-NI (300-grade) maraging steel

Król, M.; Snopiński, Przemysław; Czech, Adam

doi:10.1007/s10973-020-09316-4

Cited by 35 publications

(19 citation statements)

References 29 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The third deviation occurred during the cooling cycle and corresponded to the martensitic transition, where M s and M f temperatures were 221 °C and 110 °C, respectively. Therefore, a single-phase microstructure characterized steel as martensite after cooling at room temperature [ 13 ].…”

Section: Resultsmentioning

confidence: 99%

“…Among machine part manufacturing technology, there is a common interest in additive manufacturing technology, which includes selective laser melting (SLM) [ 10 , 11 , 12 , 13 , 14 ]. In this method, a focused laser beam is used to spot powder beds and perform successive melting of the powder layer that bonds to current layers, which results in a 3D model.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Selective Laser Melting of 18NI-300 Maraging Steel

et al. 2020

Self Cite

View full text Add to dashboard Cite

In the present study, 18% Ni 300 maraging steel powder was processed using a selective laser melting (SLM) technique to study porosity variations, microstructure, and hardness using various process conditions, while maintaining a constant level of energy density. Nowadays, there is wide range of utilization of metal technologies and its products can obtain high relative density. A dilatometry study revealed that, through heating cycles, two solid-state effects took place, i.e., precipitation of intermetallic compounds and the reversion of martensite to austenite. During the cooling process, one reaction took place (i.e., martensitic transformation), which was confirmed by microstructure observation. The improvements in the Rockwell hardness of the analyzed material from 42 ± 2 to 52 ± 0.5 HRC was improved as a result of aging treatment at 480 °C for 5 h. The results revealed that the relative density increased using laser speed (340 mm/s), layer thickness (30 µm), and hatch distance (120 µm). Relative density was found approximately 99.3%. Knowledge about the influence of individual parameters in the SLM process on porosity will enable potential manufacturers to produce high quality components with desired properties.

show abstract

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Selective Laser Melting of 18NI-300 Maraging Steel

et al. 2020

Self Cite

View full text Add to dashboard Cite

show abstract

“…In the presented work, the stability regions with a high power dissipation factor η , which relates to the optimal treatment states of DRX and DRV, were less productive when η < 50% because the generation of interfaces formulated by dislocation generation and simultaneous recovery took the energy. Conversely, the occurrence of cracking processes was characterized when η > 50%, because the energy conversion onto the surface was more effective [ 29 ].…”

Section: Resultsmentioning

confidence: 99%

“…Analysis of elements in the alloy was performed using an inductively coupled optical emission spectrometer with an inductively coupled plasma (ICP OES) OPTIMA 5300V, made by PerkinElmer (Waltham, MA, USA). The uniaxial hot compression experiments were completed using a DIL 805 A/D dilatometer delivered by TA Instruments (Zaventem, Belgium) [ 29 ], over a strain rate range of 0.01 s −1 to 1 s −1 and a temperature range of 250 °C to 400 °C, using a PtRh10–Pt thermocouple rod under an argon protective atmosphere to prevent sample oxidation. Before the compression experiments, the samples were heated up to the deformation temperature at a heating rate of 5 °C·s −1 and held isothermally for 5 min, before being compressed at a constant strain rate.…”

Section: Methodsmentioning

confidence: 99%

Hot Deformation Treatment of Grain-Modified Mg–Li Alloy

et al. 2020

Self Cite

View full text Add to dashboard Cite

In this work, a systematic analysis of the hot deformation mechanism and a microstructure characterization of an as-cast single α-phase Mg–4.5 Li–1.5 Al alloy modified with 0.2% TiB addition, as a grain refiner, is presented. The optimized constitutive model and hot working terms of the Mg–Li alloy were also determined. The hot compression procedure of the Mg–4.5 Li–1.5 Al + 0.2 TiB alloy was performed using a DIL 805 A/D dilatometer at deformation temperatures from 250 °C to 400 °C and with strain rates of 0.01–1 s−1. The processing map adapted from a dynamic material model (DMM) of the as-cast alloy was developed through the superposition of the established instability map and power dissipation map. By considering the processing maps and microstructure characteristics, the processing window for the Mg–Li alloy were determined to be at the deformation temperature of 590 K–670 K and with a strain rate range of 0.01–0.02 s−1.

show abstract

“…Rather than the typical high carbon content, the martensitic microstructure of AMed 18Ni300 maraging steel is achieved by nickel addition, which is the main element. The lack of carbon enhances weldability, which in turn makes such alloys a good choice for additive processing [24,25].…”

Section: Additively Manufactured 18ni300 Maraging Steelmentioning

confidence: 99%

An Efficient Methodology towards Mechanical Characterization and Modelling of 18Ni300 AMed Steel in Extreme Loading and Temperature Conditions for Metal Cutting Applications

Silva

Gregório

Jesus

et al. 2021

JMMP

View full text Add to dashboard Cite

A thorough control of the machining operations is essential to ensure the successful post-processing of additively manufactured components, which can be assessed through machinability tests endowed with numerical simulation of the metal cutting process. However, to accurately depict the complex metal cutting mechanism, it is not only necessary to develop robust numerical models but also to properly characterize the material behavior, which can be a long-winded process, especially for state-of-stress sensitive materials. In this paper, an efficient mechanical characterization methodology has been developed through the usage of both direct and inverse calibration procedures. Apart from the typical axisymmetric specimens (such as those used in compression and tensile tests), plane strain specimens have been applied in the constitutive law calibration accounting for plastic and damage behaviors. Orthogonal cutting experiments allowed the validation of the implemented numerical model for simulation of the metal cutting processes. Moreover, the numerical simulation of an industrial machining operation (longitudinal cylindrical turning) revealed a very reasonably prediction of cutting forces and chip morphology, which is crucial for the identification of favorable cutting scenarios for difficult-to-cut materials.

show abstract

The phase transitions in selective laser-melted 18-NI (300-grade) maraging steel

Cited by 35 publications

References 29 publications

Selective Laser Melting of 18NI-300 Maraging Steel

Selective Laser Melting of 18NI-300 Maraging Steel

Hot Deformation Treatment of Grain-Modified Mg–Li Alloy

An Efficient Methodology towards Mechanical Characterization and Modelling of 18Ni300 AMed Steel in Extreme Loading and Temperature Conditions for Metal Cutting Applications

Contact Info

Product

Resources

About