scholarly journals CHARACTERIZATION OF INCONEL 718: USING THE GLEEBLE AND VARESTRAINT TESTING METHODS TO DETERMINE THE WELDABILITY OF INCONEL 718

2010 ◽  
Author(s):  
Nathaniel Oscar Knock
Keyword(s):  
Inconel 718 ◽  
Testing Methods ◽  
Varestraint Testing

scholarly journals An Automated Aerosol Collection and Extraction System to Characterize Electronic Cigarette Aerosols

2021 ◽  
Vol 9 ◽  
Author(s):  
Yeongkwon Son ◽  
Andrey Khlystov
Keyword(s):  
Electronic Cigarette ◽  
Extraction System ◽  
Cigarette Use ◽  
Testing Methods ◽  
Sampling System ◽  
Toxic Compounds ◽  
Use Patterns ◽  
Variable Power ◽  
Flow Control System

Electronic cigarette (e-cigarette) market increased by 122% during 2014–2020 and is expected to continue growing rapidly. Despite their popularity, e-cigarettes are known to emit dangerous levels of toxic compounds (e.g., carbonyls), but a lack of accurate and efficient testing methods is hindering the characterization of e-cigarette aerosols emitted by a wide variety of e-cigarette devices, e-liquids, and use patterns. The aim of this study is to fill this gap by developing an automated E-cigarette Aerosol Collection and Extraction System (E-ACES) consisting of a vaping machine and a collection/extraction system. The puffing system was designed to mimic e-cigarette use patterns (i.e., power output and puff topography) by means of a variable power-supply and a flow control system. The sampling system collects e-cigarette aerosols using a combination of glass wool and a continuously wetted denuder. After the collection stage, the system is automatically washed with absorbing and extracting liquids (e.g., methanol, an acetaldehyde-DNPH solution). The entire system is controlled by a computer. E-ACES performance was evaluated against conventional methods during measurements of nicotine and carbonyl emissions from a tank type e-cigarette. Nicotine levels measured using glass fiber filters and E-ACES were not significantly different: 201.2 ± 6.2 and 212.5 ± 17 μg/puff (p = 0.377), respectively. Differences in formaldehyde and acetaldehyde levels between filter-DNPH cartridges and the E-ACES were 14% (p = 0.057) and 13% (p = 0.380), respectively. The E-ACES showed reproducible nicotine and carbonyl testing results for the selected e-cigarette vaping conditions.

scholarly journals 3D Characterization of the Columnar-to-Equiaxed Transition in Additively Manufactured Inconel 718

2020 ◽  
pp. 990-1002 ◽  
Author(s):  
Andrew T. Polonsky ◽  
Narendran Raghavan ◽  
McLean P. Echlin ◽  
Michael M. Kirka ◽  
Ryan R. Dehoff ◽  
...  
Keyword(s):  
Inconel 718 ◽  
Columnar To Equiaxed Transition

PREPARATION, MORPHOLOGY AND MECHANICAL PROPERTIES OF EPOXY NANOCOMPOSITES WITH ALUMINA FILLERS

2010 ◽  
Vol 24 (01n02) ◽  
pp. 136-147 ◽  
Author(s):  
SHEAU HOOI LIM ◽  
KAIYANG ZENG ◽  
CHAOBIN HE
Keyword(s):  
Mechanical Properties ◽  
Tensile Testing ◽  
Thermomechanical Properties ◽  
Nano Particles ◽  
Testing Methods ◽  
Transmission Electron ◽  
Alumina Particles ◽  
Thermomechanical Testing ◽  
Platelet Shape

This paper presents recent studies on the processing and characterization of epoxy-alumina nanocomposites. Nano-sized alumina particles are incorporated into epoxy resin via solvent-assisted method, so that the particles are dispersed homogeneously in the epoxy matrix. The morphologies, mechanical and thermomechanical properties of the resulting nanocomposites are studied using transmission electron microscope (TEM), conventional tensile testing and thermomechanical testing methods. TEM results show that the alumina nano-particles with a higher specific surface area tend to agglomerate. Furthermore platelet shape particles shows a better dispersion homogeneity as well as better improvement in the mechanical properties of the composites compared to the rod shape particles.

scholarly journals Characterization of microstructure and strength of microwave welded Inconel 718 joints at 2.45 GHz frequency

2016 ◽  
Vol 54 (01) ◽  
pp. 27-35 ◽  
Author(s):  
A. Bansal ◽  
A. Kumar Sharma ◽  
S. Das ◽  
P. Kumar
Keyword(s):  
Inconel 718
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