Additive manufacturing of alumina using laser engineered net shaping: Effects of deposition variables

Li, Yuzhou; Hu, Yingbin; Cong, Weilong; Zhi, Lin; Guo, Zhongning

doi:10.1016/j.ceramint.2017.03.085

Cited by 107 publications

(42 citation statements)

References 33 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…1,2 To date, there are many metallic materials that can be printed effectively, and the existing AM technologies are divided into two main categories: powder-fed and powder-bed systems. The powder-fed category is further classified for direct laser deposition (DLD), laser engineered net shaping methods and so on, [3][4][5][6][7][8] while the powder-bed category involves selective laser melting (SLM), selective laser sintering and electron beam melting technologies. [9][10][11][12][13][14] In general, the cooling rate for SLM is usually >10 5 K/s, which is higher than that of DLD (ranging from 10 3 to 10 5 K/s) and much higher than that for traditional casting methods that have an approximate solidification rate of 273-373 K/s.…”

Section: Introductionmentioning

confidence: 99%

Corrosion of metallic materials fabricated by selective laser melting

Kong

2019

npj Mater Degrad

188

View full text Add to dashboard Cite

Additive manufacturing is an emerging technology that challenges traditional manufacturing methods. However, the corrosion behaviour of additively manufactured parts must be considered if additive techniques are to find widespread application. In this paper, we review relationships between the unique microstructures and the corresponding corrosion behaviour of several metallic alloys fabricated by selective laser melting, one of the most popular powder-bed additive technologies for metals and alloys. Common issues related to corrosion in selective laser melted parts, such as pores, molten pool boundaries, surface roughness and anisotropy, are discussed. Widely printed alloys, including Ti-based, Al-based and Fe-based alloys, are selected to illustrate these relationships, and the corrosion properties of alloys produced by selective laser melting are summarised and compared to their conventionally processed counterparts.

show abstract

Section: Introductionmentioning

confidence: 99%

Corrosion of metallic materials fabricated by selective laser melting

Kong

2019

npj Mater Degrad

188

View full text Add to dashboard Cite

show abstract

“…Khairallah [46] studied the features of the melt pool using computer simulations, and Panwisawas et al [47] modeled the effects of the process parameters on the microstructural properties of single tracks made of Ti-6Al-4V alloy. Liu et al [48] developed a mathematical approach to study the effect of the substrate preset temperature on the microstructural properties, and Li et al [49] examined the effects of the process parameters on the geometry and microhardness of single tracks deposited of an alumina ceramic.…”

Section: Introductionmentioning

confidence: 99%

Single Tracks as a Key Factor in Additive Manufacturing Technology—Analysis of Research Trends and Metal Deposition Behavior

et al. 2020

View full text Add to dashboard Cite

In recent years, general studies on Selective Laser Melting (SLM)/Selective Laser Sintering (SLS)/direct metal deposition (DMD) technologies, as well as studies on detailed issues in this area, have been carried out. However, a research gap is observed in investigations into the features of single tracks in the above-mentioned technologies. On the basis of data published in 2016–2019, an approach was adopted for a preliminary quantitative analysis of the knowledge base and also trends observed in the development of new technologies. This study demonstrates the effectiveness of the data mining technique based on the Bayes algorithm for analyzing trends in processes of additive manufacturing and the practical application of the knowledge received using the Bayes algorithm. After the analyses referred to above were completed, single and double layers of a composite material based on the Ni-based alloy and Fe–Al bronze were analyzed under different processing conditions. The effects of laser spot speeds and pitches on microhardness, microstructure, and interlayers’ features were described. So, the innovative approach, namely, the combination of the analysis of the scientific database of the phenomenon under study and the subsequent experimental investigation of its features, is the scientific novelty of the present study.

show abstract

“…And final machining generally requires diamond tooling [5], which is costly and time-consuming. Many of those processes can represent up to 80% of the overall manufacturing cost of a ceramic product [6].…”

Section: Introductionmentioning

confidence: 99%

Selective laser melting of alumina: A single track study

Fan

Huang

2018

Ceramics International

View full text Add to dashboard Cite

Ceramics-based additive manufacturing is a complex process and the solidification mechanism and microstructural evolution are currently not fully understood. In this work, Al 2 O 3 single tracks were formed using a customised selective laser melting (SLM) system equipped with a high power diode laser. The effects of laser energy density (LED) on geometry, microstructure and micro-mechanical properties of Al 2 O 3 tracks were investigated. To better understand the solidification mechanism, a transient threedimensional thermal model was developed for predicting the thermal behaviour of the melt pool. The results indicated the use of high LED gave rise to decreased viscosity and surface tension of the molten alumina and led to localised melting of the substrate. Both, in turn, enabled the formation of a continuous solidified track. The solidified tracks were primarily composed of columnar dendrite. When relatively high LED (≥25.7 kJ/m) was applied, equiaxed dendrite appeared along the central line near the 2 track surface. The size of dendritic grains decreased with the decreased LED, attributed to the increased cooling rate at solidification interface. The micro-hardness of the solidified track was found to be inversely proportional to the grain size owning to grain boundary strengthening effect.

show abstract

Additive manufacturing of alumina using laser engineered net shaping: Effects of deposition variables

Cited by 107 publications

References 33 publications

Corrosion of metallic materials fabricated by selective laser melting

Corrosion of metallic materials fabricated by selective laser melting

Single Tracks as a Key Factor in Additive Manufacturing Technology—Analysis of Research Trends and Metal Deposition Behavior

Selective laser melting of alumina: A single track study

Contact Info

Product

Resources

About