Properties of gas-atomized Cu-Ti-based metallic glass powders for additive manufacturing

Barreto, Erika Soares; Frey, Maximilian; Wegner, Jan; Jose, Allen; Neuber, Nico; Busch, Ralf; Kleszczynski, Stefan; Mädler, Lutz; Uhlenwinkel, Volker

doi:10.1016/j.matdes.2022.110519

Cited by 11 publications

(16 citation statements)

References 49 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…A possible explanation might be the closed, circulating gas system of the AM system unit and possibly the better-controlled atmosphere inherent from the comparatively smaller volume chamber [6,10]. Furthermore, the large surface area of powders, mainly responsible for the high oxygen content in droplets [11], is dissolved and remelted into the samples. Consequently, a lower surface area is generated, which accounts for lower oxygen uptake.…”

Section: Resultsmentioning

confidence: 99%

“…The corresponding results for the CP-Vit101Si powders are 1505 ± 73 ppm, 750 ± 10 ppm, and 564 ± 16 ppm. Here, the larger surface-to-volume ratio of smaller powder fractions leads to larger oxygen contamination [11].…”

Section: Resultsmentioning

confidence: 99%

“…The generated master alloy was sequentially re-melted and atomised. In the spray chamber, the measured oxygen concentration was 100 ppm [11]. Table 1 summarises the experimental parameters of each gas-atomisation run.…”

Section: Powder Productionmentioning

confidence: 99%

“…One reason is the generally poorer atmosphere of processing chambers and repeated melting steps compared to casting. Owing to the oxygen entrapment and humidity in the powder feedstock, as well as the surface-to-volume ratio governing oxygen uptake during atomisation, higher oxygen pick-up occurs along the production chain [2,8,9,[11][12][13]. Besides, the processing gas atmosphere and feedstock purity influence the vitrification process in metallic glasses [1,10,13,14].…”

Section: Introductionmentioning

confidence: 99%

“…[2,4,5,[8][9][10]13,[20][21][22]. Thus, PBF-LB/M of BMGs is mostly performed with expensive high-purity (HP) materials instead of commercial purity (CP, industrial-grade), constraining their broad commercialisation [11]. For instance, it was reported that crystallisation could not be avoided in an industrial-purity Zr-based alloy (Zr 59.3 Cu 28.8 Al 10.4 Nb 1.5 , in at.%, tradename AMZ4) manufactured with gas-atomised amorphous powders with an oxygen content around 1300 ppm [23].…”

Section: Introductionmentioning

confidence: 99%

See 4 more Smart Citations

Influence of oxygen in the production chain of Cu–Ti-based metallic glasses via laser powder bed fusion

et al. 2023

Self Cite

View full text Add to dashboard Cite

Laser powder bed fusion of metals (PBF-LB/M) is advantageous for manufacturing bulk metallic glasses with size and geometrical freedom. However, the oxygen uptake along the production chain can negatively impact the generation of high-quality, amorphous parts. In this context, Cu-Ti-based alloys were gas-atomised and additively manufactured using commercial-(CP) and high-purity (HP) feedstocks. The oxygen absorption in each processing step was tracked and related to the amorphous phase formation and glass-forming ability (GFA) of alloys. Results show an increasing oxygen absorption, considerably influenced by the starting feedstock, especially for CP. In HP material, the most contribution is inherent from the powder oxygen content. Results reveal the lack of influence of the oxygen content in the GFA. TEM analysis of commercial powder and PBF-LB/M sample show uniform and featureless micrographs, displaying the absence of oxygen-induced nucleation. The present contribution enhances the qualification and economic processability of amorphous metals by PBF-LB/M.

show abstract

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Powder Productionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Influence of oxygen in the production chain of Cu–Ti-based metallic glasses via laser powder bed fusion

et al. 2023

Self Cite

View full text Add to dashboard Cite

show abstract

Review on preparation technology and properties of spherical powders

Yu,

Zhao,

Zhao

et al. 2024

Int J Adv Manuf Technol

View full text Add to dashboard Cite

Empirical calibration method for the thermal simulation of Cu47Ti34Zr11Ni8 single tracks in laser powder bed fusion

Bruckhaus,

Wegner,

Schnell

et al. 2024

Prog Addit Manuf

View full text Add to dashboard Cite

Bulk metallic glasses (BMGs) are materials that, due to their amorphous microstructure, offer a unique combination of high strength, hardness, and elasticity, making them attractive for various applications. Using laser powder bed fusion (PBF-LB/M) enables overcoming the current limitations of BMGs in size and shape imposed by traditional manufacturing methods such as casting. Despite its potential, challenges such as porosity, (nano-) crystallization, and impurities affect the mechanical performance of additively manufactured BMGs. This study focuses on the Cu–Ti-based alloy Vit101, known for its higher strength and improved cost-effectiveness compared to Zr-based BMGs. In-situ high-speed pyrometry and thermal simulations of single tracks are employed to enhance the understanding of processing and controlling the thermal cycling of Vit101. The proposed experimental calibration is performed through an off-axis integration of the pyrometer, allowing for in-situ temperature measurements. The acquired data show sufficient congruence with the simulated cooling profiles. Minimal cooling rates in the range of 104 K/s were measured and simulated above the glass transition temperature, indicating a large leeway for further development of glass-forming alloys. Scan track widths are evaluated for validation, resulting in minor deviations between 0.47% and 3.17%. However, challenges emerge at high scanning speeds, leading to higher deviations attributed to balling phenomena, which are not considered in the numerical model.

show abstract

Properties of gas-atomized Cu-Ti-based metallic glass powders for additive manufacturing

Cited by 11 publications

References 49 publications

Influence of oxygen in the production chain of Cu–Ti-based metallic glasses via laser powder bed fusion

Influence of oxygen in the production chain of Cu–Ti-based metallic glasses via laser powder bed fusion

Review on preparation technology and properties of spherical powders

Empirical calibration method for the thermal simulation of Cu47Ti34Zr11Ni8 single tracks in laser powder bed fusion

Contact Info

Product

Resources

About