Transformations of Ti-5Al-5V-5Cr-3Mo powder due to reuse in laser powder bed fusion: A surface analytical approach

Sen-Britain, Shohini; Keilbart, Nathan; Kweon, Kyoung E.; Pham, Tuan Anh; Orme, Christine A.; Wood, Brandon C.; Nelson, A. J.

doi:10.1016/j.apsusc.2021.150433

Cited by 8 publications

(4 citation statements)

References 38 publications

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“…An oxide layer with a thickness of about 20 nm is on the surface of powders which have been reused for 18 times [245] (figures 13(a-i) and (a-ii)). The increase in oxide thickness was also reported for Ti5553 [246], in which the thickness of hydroxylated mixed oxide composed of TiO 2 and Al 2 O 3 increased from (5.6 ± 0.7) nm to (8.3 ± 1.1) nm after repeated use. The changes in the thickness or composition of the oxide layer on the surface of the powders may lead to changes in the moisture absorption capacity of the powders.…”

Section: Powder Reusability Of Titanium and Titanium Alloysupporting

confidence: 67%

Characterization, preparation, and reuse of metallic powders for laser powder bed fusion: a review

Sun,

Chen,

Liu

et al. 2023

Int. J. Extrem. Manuf.

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Laser powder bed fusion (L-PBF) has attracted significant attention since its inception, providing unprecedented advantages to fabricate metallic components with complex geometry. The quality and performance of as-printed alloys is an intricate function consisting of numerous factors linking the feedstock powders, manufacturing, and post-treatment. As the starting materials, powders play a critical role in influencing the printing consistency, total fabrication cost, and mechanical properties. In consideration of its importance for L-PBF, the present review aims to review the recent progress on metallic powders for L-PBF focusing on powder characterization, powder fabrication, and powder reuse. The methods of powder characterization and fabrication were presented in the beginning by analyzing the principles and corresponding advantages and limitations. Subsequently, the effect of powder reuse on the powder characteristics and mechanical performance of L-PBF parts is analyzed focusing on steels, nickel-based superalloys, Ti and Ti alloys, and Al alloys. The evolution trend of powders and as-printed parts varies for different alloy systems based on the existing studies, which makes the proposal of a unified reuse protocol infeasible. Finally, perspectives are presented to cater to the increasing applications of AM technologies for future investigations. The present state-of-the-art work can pave the way for the broad industrial applications of L-PBF by enhancing printing consistency and reducing the total cost from the perspective of powders.

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Section: Powder Reusability Of Titanium and Titanium Alloysupporting

confidence: 67%

Characterization, preparation, and reuse of metallic powders for laser powder bed fusion: a review

Sun,

Chen,

Liu

et al. 2023

Int. J. Extrem. Manuf.

View full text Add to dashboard Cite

show abstract

“…The X-ray spot size was around 200 μm. Survey spectra for each sample were recorded using a pass energy of 100 eV and a step size of 1 eV, 53 and high-resolution spectra of each sample for the C 1s, O 1s, Ti 2p, and Ti 3p regions were recorded with a pass energy of 20 eV and a step size of 0.1 eV. The C 1s peak at 284.8 eV for adventitious carbon was used as a reference for all spectra.…”

Section: Methodsmentioning

confidence: 99%

“…The C 1s peak at 284.8 eV for adventitious carbon was used as a reference for all spectra. 53 High resolution spectra were curve-fitted using Multipak 9.6.15 using a Shirley background subtraction. Gaussian–Lorentzian peaks were used for curve fitting.…”

Section: Methodsmentioning

confidence: 99%