Preparation and mechanical properties of selective laser melted H13 steel

Ren, Bo; Lu, Dehong; Zhou, Rong; Li, Zhenhua; Guan, Jieren

doi:10.1557/jmr.2019.10

Cited by 64 publications

(28 citation statements)

References 21 publications

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“…The retained austenite in the samples still shows <10 > texture [198,199]. Similar observations were also reported in high carbon tool steels (H13) [200].…”

Section: Texturesupporting

confidence: 86%

Heterogeneous Aspects of Additive Manufactured Metallic Parts: A Review

2021

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Metal additive manufacturing (MAM) is an emerging technology to produce complex end-use metallic parts. To adopt MAM for manufacturing numerous engineering parts used in critical applications, a thorough understanding of the relationship between the complex thermal cycles in MAM and the unique heterogeneous microstructures of MAM parts need to be established. This review article provides a comprehensive overview of the evolution of heterogeneous microstructures in MAM parts, including melt pool boundaries, heterogeneous grain structure, sub-grain cellular structure, matrix supersaturation, segregation, phase transformation, oxides formation, and texture. The evolution of residual stresses and the anisotropy in MAM parts and the post-MAM heat treatment effects on the microstructural evolution are also discussed. This review covers the microstructural aspects of most engineering materials in particular steels, high entropy alloys, aluminum alloys, titanium alloys, nickel-base superalloys, and copper alloys, with a primary focus on the parts manufactured using selective laser melting, direct energy deposition, and electron beam melting processes.

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“…The retained austenite in the samples still shows <10 > texture [198,199]. Similar observations were also reported in high carbon tool steels (H13) [200].…”

Section: Texturesupporting

confidence: 86%

Heterogeneous Aspects of Additive Manufactured Metallic Parts: A Review

2021

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“…Here, the reported results are in accordance with the findings of other authors for as-built H13 tool steel. Krell [15] measured 607 HV for VED 111 J/mm 3 and Ren [43] reached 561 HV for VED 106 J/mm 3 .…”

Section: Discussionmentioning

confidence: 97%

Influence of Selective Laser Melting Technology Process Parameters on Porosity and Hardness of AISI H13 Tool Steel: Statistical Approach

et al. 2021

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The correct setting of laser beam parameters and scanning strategy for Selective Laser Melting (SLM) technology is a demanding process. Usually, numerous experimental procedures must be taken before the final strategy can be applied. The presented work deals with SLM technology and the impact of its technological parameters on the porosity and hardness of AISI H13 tool steel. In this study, we attempted to map the dependency of porosity and hardness of the tested tool steel on a broad spectrum of scanning speed–-laser power combinations. Cubic samples were fabricated under parameters defined by full factorial DOE, and metallurgic specimens were prepared for measurement of the two studied quantities. The gathered data were finally analyzed, and phenomenological models were proposed. Analysis of the data revealed a minimal energy density of 100.3 J/mm3 was needed to obtain a dense structure with a satisfactory hardness level. Apart from this, the model may be used for approximation of non-tested combinations of input parameters.

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“…This Cr steel with the nominal composition of 0.40C, 0.40Mn, 1.00Si, 5.25Cr, 1.35Mo, 1.00V (wt%) offers excellent hot hardness and thermal fatigue resistance in wrought condition. The microstructure of AM H13 consists of cells and dendrites with retained austenite regions observed in the interdendritic areas [210,211] (Fig. 17).…”

Section: H13mentioning

confidence: 99%

“…17). Carbon enrichment results in retained austenite stabilisation at room temperature [210]. The size of the cells depends on the cooling rate with larger cells observed in DED samples compared to LPBF samples [211].…”

Section: H13mentioning

confidence: 99%

Additive manufacturing of steels: a review of achievements and challenges

et al. 2020

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Metal additive manufacturing (AM), also known as 3D printing, is a disruptive manufacturing technology in which complex engineering parts are produced in a layer-by-layer manner, using a high-energy heating source and powder, wire or sheet as feeding material. The current paper aims to review the achievements in AM of steels in its ability to obtain superior properties that cannot be achieved through conventional manufacturing routes, thanks to the unique microstructural evolution in AM. The challenges that AM encounters are also reviewed, and suggestions for overcoming these challenges are provided if applicable. We focus on laser powder bed fusion and directed energy deposition as these two methods are currently the most common AM methods to process steels. The main foci are on austenitic stainless steels and maraging/precipitation-hardened (PH) steels, the two so far most widely used classes of steels in AM, before summarising the state-of-the-art of AM of other classes of steels. Our comprehensive review highlights that a wide range of steels can be processed by AM. The unique microstructural features including hierarchical (sub)grains and fine precipitates induced by AM result in enhancements of strength, wear resistance and corrosion resistance of AM steels when compared to their conventional counterparts. Achieving an acceptable ductility and fatigue performance remains a challenge in AM steels. AM also acts as an intrinsic heat treatment, triggering ‘in situ’ phase transformations including tempering and other precipitation phenomena in different grades of steels such as PH steels and tool steels. A thorough discussion of the performance of AM steels as a function of these unique microstructural features is presented in this review.

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Preparation and mechanical properties of selective laser melted H13 steel

Abstract: Abstract

Cited by 64 publications

References 21 publications

Heterogeneous Aspects of Additive Manufactured Metallic Parts: A Review

Heterogeneous Aspects of Additive Manufactured Metallic Parts: A Review

Influence of Selective Laser Melting Technology Process Parameters on Porosity and Hardness of AISI H13 Tool Steel: Statistical Approach

Additive manufacturing of steels: a review of achievements and challenges

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