Tension-compression asymmetry of additively manufactured Maraging steel

Cyr, Edward; Lloyd, Alan; Mohammadi, Mohsen

doi:10.1016/j.jmapro.2018.08.015

Cited by 43 publications

(37 citation statements)

References 26 publications

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“…The observed strength differential effect between compression and tensile loading suggests the sensitivity of the tested alloy to the state-of-stress. Similar behavior has been reported for several AMed alloys [36,37], including the same maraging steel alloy [38]. However, this behavior does not seem to be exclusive of AMed metallurgical condition, given that appreciable differences between compressive and tensile yield strengths have also been noted for martensitic steels [39], including the same maraging steel alloy of conventional manufacturing (wrought) [40].…”

Section: Compliance With Metal Cutting Conditionssupporting

confidence: 77%

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

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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.

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Section: Compliance With Metal Cutting Conditionssupporting

confidence: 77%

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

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show abstract

“…EOS GmbH (Germany) has described this process as direct metal laser sintering (DMLS). [ 6,7 ] DMLS is an advanced technology that enables the rapid production of complex‐shaped 3D parts using metal powders. [ 8 ] DMLS has a unique ultrafine and metastable microstructure, thanks to its fast solidification rate (10 3 –10 8 K s −1 ).…”

Section: Introductionmentioning

confidence: 99%

A Study on the Effects of Different Heat‐Treatment Parameters on Microstructure–Mechanical Properties and Corrosion Behavior of Maraging Steel Produced by Direct Metal Laser Sintering

Özer

Karaaslan

2020

steel research int.

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Additive manufacturing (AM) is the most remarkable manufacturing technology developed in recent years. With this technology, it can produce products directly from a computeraided design model. In this respect, AM technologies can provide parts in less time compared with traditional production methods by producing less waste with a shorter processing step and will be very important for future industry applications because of these features. [1-5] Selective laser sintering (SLS) is a process of bonding (sintering) powder particles to each other by exceeding the melting temperature utilizing a laser beam. SLS machines can be given different names. EOS GmbH (Germany) has described this process as direct metal laser sintering (DMLS). [6,7] DMLS is an advanced technology that enables the rapid production of complex-shaped 3D parts using metal powders. [8] DMLS has a unique ultrafine and metastable microstructure, thanks to its fast solidification rate (10 3-10 8 K s À1). [9] This rapid solidification results in high thermal gradients and short interaction time. Thus, the microstructures of DMLS-produced materials are different than those produced by conventional methods. Tool steels produced by AM methods also have microstructures that are quite different from traditional cast-tool steels. Due to the advantages of the SLS method, it is widely used in aerospace, medical, defense, and automotive industries. AlSi10Mg, titanium, stainless steels, composites, tool steels, and Ni-based alloys can be produced by the DMLS method. [10-15] The name "Maraging" comes from the combination of martensite and aging. [16] Maraging steels (MS1) are valuable materials due to their excellent formability, weldability, toughness, and high strength. Therefore, it is preferred in critical applications such as submarine bodies, gears, rocket engine cases, aircraft components, pressure vessels. [17-22] 18Ni-300 MS1 is used in the AM processes. MS1 is a steel that can be aged, and forms precipitates such as Ni 3 Mo, Ni 3 Al, Ni 3 Ti, Fe 2 Mo, etc. [23-30]. MS1 is a fascinating steel for engineering applications because of its good weldability, machinability, and surface treatment. MS1 produced with DMLS show low strength in as-built condition. Various heat treatments are applied to this material to increase strength. These heat treatments are directly aged from the as-built state (aged) and solution and after aging (SHT) heat treatments. [31,32] In the literature, MS1 studies that were produced by the SLM method have been done before, but these are limited. Also, no research has been done about MS1 produced by the DMLS

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“…Dynamic process planning, which has been widely adopted in traditional manufacturing processes [39][40][41], can help save production time, reduce cost, and improve the overall productivity [37]. In the DMLS process, the selection of values for process parameters such as laser power, scanning speed, and hatching distance is likely to affect the production cost, as well as fabrication quality [42]. Limited by machine specifications, these process parameters usually can be altered within feasible ranges [43].…”

Section: Introductionmentioning

confidence: 99%

Cost Modeling and Evaluation of Direct Metal Laser Sintering with Integrated Dynamic Process Planning

Yang

2020

Sustainability

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Additive manufacturing technologies have been adopted in a wide range of industries such as automotive, aerospace, and consumer products. Currently, additive manufacturing is mainly used for small-scale, low volume productions due to its limitations such as high unit cost. To enhance the scalability of additive manufacturing, it is critical to evaluate and preferably reduce the cost of adopting additive manufacturing for production. The current literature on additive manufacturing cost mainly adopts empirical approaches and does not sufficiently explore the cost-saving potentials enabled by leveraging different process planning algorithms. In this article, a mathematical cost model is established to quantify the different cost components in the direct metal laser sintering process, and it is applicable for evaluating the cost performance when adopting dynamic process planning with different layer-wise process parameters. The case study results indicate that 12.73% of the total production cost could be potentially reduced when applying the proposed dynamic process planning algorithm based on the complexity level of geometries. In addition, the sensitivity analysis results suggest that the raw material price and the overhead cost are the two key cost drivers in the current additive manufacturing market.

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Tension-compression asymmetry of additively manufactured Maraging steel

Cited by 43 publications

References 26 publications

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

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

A Study on the Effects of Different Heat‐Treatment Parameters on Microstructure–Mechanical Properties and Corrosion Behavior of Maraging Steel Produced by Direct Metal Laser Sintering

Cost Modeling and Evaluation of Direct Metal Laser Sintering with Integrated Dynamic Process Planning

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