IMECE2022-88299 Midwest Engineered Systems Inc. has created a novel laser wire metal deposition process, ADDere manufacturing. ADDere has a much higher deposition rate than powder bed fusion, making it ideal for large components. In this project, the mechanical properties of ADDere printed materials were tested and compared to typical values found in ASM publications to show the quality of materials manufactured by the ADDere printing process. A detailed material analysis was performed on samples made from Ti-6Al-4V and 17-4 PH stainless steel. This work builds upon an earlier study of samples made from 17-4 PH that were produced using a single direction pattern. In this project, the 17-4 PH samples were printed in a cross hatched pattern, and testing results were compared to existing data from single direction samples of the previous research. The Ti-6Al-4V samples were created in two builds. One using the uni-directional method and the other with the crossed pattern. Testing specimens were removed from the samples using a water jet cutter and further machined into ASTM tensile bars and metallurgic mounts to perform a thorough material evaluation. The Ti-6Al-4V sample met the expected values in the ASM literature, and the cross hatched 17-4 PH exhibited a higher hardness and better microstructure than the single direction samples from the previous work. It was also observed that when the Ti64 samples were manufactured in the cross hatched pattern, the properties indicated slight improvement and more homogeneity than those printed in single layer direction. The obtained results indicate that ADDere’s printing process can produce highly refined materials that are customizable with their expected uses. This work showcases an excellent industry collaboration of an undergraduate research experience.
more »
« less
Daily time series of matrix glass composition from tephra samples from the 2021 Tajogaite eruption at Cumbre Vieja volcano (La Palma, Canary Islands)
Ash and lapilli samples were continuously collected during the 2021 eruption of Cumbre Vieja volcano. This dataset reports the major and volatile (S, Cl) element compositions of matrix glasses from these samples. Data were acquired by electron probe microanalysis at the American Museum of Natural History and are given for 85 samples and 4 duplicates, resulting in a daily time series of erupted melt composition capturing 94% of the eruptive sequence.
more »
« less
- Award ID(s):
- 1944723
- PAR ID:
- 10589151
- Publisher / Repository:
- Interdisciplinary Earth Data Alliance (IEDA)
- Date Published:
- Subject(s) / Keyword(s):
- Other volcanic ash, matrix glass, melt composition, time series, Cumbre Vieja, La Palma
- Format(s):
- Medium: X Other: application/vnd.openxmlformats-officedocument.spreadsheetml.sheet
- Location:
- 2021 Tajogaite eruption, Cumbre Vieja volcano, La Palma, Canary Islands, Spain; (East Bound Longitude:-16.9422; North Bound Latitude:28.6779; South Bound Latitude:28.1059; West Bound Longitude:-17.9205); (Latitude:28.105895; Longitude:-16.942173); (Latitude:28.4943724550452; Longitude:-17.8442806005295); (Latitude:28.52582; Longitude:-17.87876); (Latitude:28.60138; Longitude:-17.88822); (Latitude:28.602914; Longitude:-17.881041); (Latitude:28.60652; Longitude:-17.88285); (Latitude:28.606834; Longitude:-17.878177); (Latitude:28.606835; Longitude:-17.878178); (Latitude:28.607629; Longitude:-17.92048); (Latitude:28.613994; Longitude:-17.836499); (Latitude:28.616693; Longitude:-17.848656); (Latitude:28.617; Longitude:-17.903); (Latitude:28.621632; Longitude:-17.873818); (Latitude:28.623803; Longitude:-17.883117); (Latitude:28.623835; Longitude:-17.886647); (Latitude:28.624518; Longitude:-17.884743); (Latitude:28.644849; Longitude:-17.880121); (Latitude:28.645767; Longitude:-17.900998); (Latitude:28.661182; Longitude:-17.914099); (Latitude:28.677933; Longitude:-17.765882)
- Right(s):
- Creative Commons Attribution-ShareAlike 4.0 International [CC-BY-SA-4.0]
- Sponsoring Org:
- National Science Foundation
More Like this
-
-
The dataset is comprised of analyses of sediment cores and sediment trap samples from ferruginous and meromictic Brownie Lake, Minnesota, U.S.A from January 2018 through February 2021. The dataset includes bulk sediment characteristics including water content, grain size, major and minor elements. Voltammetric scans were collected on porewaters and lake waters. Sediment porewaters were analyzed for pH, total alkalinity, ferrous iron, and dissolved sulfur species contents. Sediment samples were maintained under the exclusion of oxygen for analysis by synchrotron-based X-ray absorption spectroscopy.more » « less
-
This file contains grain-size data from seabed shipek grab samples collected from R/V Ukpik in summer 2021 as part of NSF project 1913195 (Arctic Shelf sediment fate – an observational and modeling study of sediment pathways and morphodynamic feedbacks in a changing polar environment). Samples were collected from across Harrison Bay on the Alaskan Beaufort Shelf, north of the Colville River and between Oliktok Point and Cape Halkett. Samples were bagged in the field and returned to the University of North Carolina at Chapel Hill where grain-size analyses were performed using an Escitec Bettersizer S3Plus laser diffraction sensor. Samples were sonicated for two minutes prior to analyses. Samples ranged from well sorted sands (typically medium sand or fine) to poorly sorted bimodal sands and muds to unimodal muds. In the field, samples exhibited diverse textures including mud clasts and very stiff muds.more » « less
-
The trace metal geochemistry of atmospheric dust and terrestrial surface particles were studied on the Qatar Peninsula from February 2014 to November 2015. We included samples of the mega dust-storm event on 01–02 April 2015. Atmospheric dust samples were collected using passive dust traps. Terrestrial surface deposits of recent dust accumulation and traffic particulate from roads were also sampled. All samples were total acid digested and analyzed for major and trace elements using ICP-OES analyzer. The concentration of thirteen elements (Ca, Mg, Ag, As, Cd, Cr, Cu, Mo, Ni, Se, Sn, Sr, Zn) were enriched in atmospheric dust samples, relative to upper continental crust (UCC). Calcium was especially enriched by up to 435% relative to UCC. About 33% of the total sample mass was CaCO3, reflecting the composition of surface rocks and soils in the source areas. Of the elements typically associated with anthropogenic activity, Ag, Ni, and Zn were most enriched relative to UCC, with enrichment factors (EF) of 182%, 233%, and 209%, respectively. Other metals, which normally reflect anthropogenic sources, including Pb and V, were not significantly enriched, with enrichment factors of 25% and 3%, respectively. Major elements (Al, Mn, Fe) were depleted (− 58%, − 35%, and − 5%, respectively) relative to UCC due to the large dilution effect of the enrichment of CaCO3. Back trajectories were determined at the date of sampling for each sample using the NOAA HYSPLIT model. These showed that the source of the dust particles was almost equally divided between northerly and southerly sources, except one sample, which appeared to originate from the west. More variability in particle source locations were observed during the winter months (October to March). Samples from the mega-dust storm were solubilized using an acetic acid-hydroxylamine hydrochloride leach procedure to obtain an upper estimate of the potential contribution of bioactive elements to surface seawater. The leach procedure solubilized a significant fraction of almost all elements. Ca was the element most affected (81% removed) because of the carbonate minerals present. Bioactive elements like Fe (25%) and P (58%) were also significantly solubilized. Because river input is so small to the Arabian Gulf, this solubilized fraction of dust is likely a major source of nutrients to surface seawater. Enrichment factors were also calculated with respect to the average composition of terrestrial surface deposits (TSD). Samples are not enriched significantly with respect to major components (EF < 2), with a depletion in Ca, K, Na in dust storm samples, reflecting a different origin. A significant enrichment of the same trace metals is evident in dust deposits and in traffic samples, but not in dust storms: Cu, Mo, Ni, Zn, possibly deriving from local atmospheric sources (traffic, industries). Samples with northern and southern origins were compared to see if the composition could be used to identify source. Only three elements were observed to be statistically different. Pb and Na were higher in samples from the south, while Cr was higher in those from the north.more » « less
-
Abstract We characterised language samples collected remotely from typically developing three-year-olds by comparing them against independent language samples collected in person from age-matched peers with and without language delays. Forty-eight typically developing, English-learning three-year-olds were administered a picture description task via Zoom. The in-person comparison groups were two sets of independent language samples from age-matched typically developing as well as language-delayed children available on the Child Language Data Exchange System. The findings show that although language samples collected remotely from three-year-olds yield numerically dissimilar lexical and grammatical measures compared to samples collected in person, they still consistently distinguish toddlers with and without language delays.more » « less
An official website of the United States government
