Journal of Materials Engineering and Performance
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Disk Laser Weld Brazing of AW5083 Aluminum Alloy with Titanium Grade 2
Journal of Materials Engineering and Performance - Tập 26 - Trang 1346-1357 - 2017
Disk laser weld brazing of dissimilar metals was carried out. Aluminum alloy 5083 and commercially pure titanium Grade 2 with the thickness of 2.0 mm were used as experimental materials. Butt weld brazed joints were produced under different welding parameters. The 5087 aluminum alloy filler wire with a diameter of 1.2 mm was used for joining dissimilar metals. The elimination of weld metal crackin......
Influence of Holding Time on Shape Recovery in a Polyurethane Shape-Memory Polymer
Journal of Materials Engineering and Performance - Tập 23 - Trang 2567-2573 - 2014
Shape-memory polymers have attracted a lot of interest in recent years. A shape-memory polymer can be deformed and fixed into a temporary shape and subsequently made to recover its original shape when a suitable stimulus is applied. This is accomplished by means of a thermomechanical cycle called programming. Programming can be performed in a stress- or strain-controlled mode. The thermomechanical......
Electrical and Thermal Properties of Twin-Screw Extruded Multiwalled Carbon Nanotube/Epoxy Composites
Journal of Materials Engineering and Performance - Tập 19 - Trang 1143-1149 - 2010
This paper presents the experimental results of dispersing multiwalled carbon nanotubes (MWNTs) into epoxy (space grade structural adhesive) nanocomposites using co-rotating twin screw extrusion process. Two sets of specimens were prepared; set 1 with ultrasonication for predispersing MWNT before extrusion and set 2 direct dispersion of MWNT in the extruder. MWNT was loaded up to 8 vol.% in both t......
Effect of Annealing on the Impact Resistance and Fracture Mechanism of PNC-60 Sinters After Cold Plastic Deformation
Journal of Materials Engineering and Performance - Tập 28 - Trang 2439-2450 - 2019
Compaction of sintered metal powders by free upsetting at room temperature dangerously reduces their plastic properties, particularly the fracture toughness. The reason for the occurrence of two unfavorable phenomena accompanying this deformation route is sought. The first phenomenon depends on the initial porosity of the preform and the amount of cold work resulting in the destruction of bonds an......
Second- and Third-Order Elastic Constants of Filaments of HexTow® IM7 Carbon Fiber
Journal of Materials Engineering and Performance - Tập 23 - Trang 685-692 - 2013
Single filaments of HexTow® IM7-12K carbon fiber were subjected to tensile measurements on a device which applies a known stress σ, and measures the resulting strain ε, and the change in resistivity Δρ. Young’s modulus E, the resistivity ρ, the piezoresistivity Δρ/ρε, and the nonlinearity in the stress-strain relation δ, were determined to be 264.1 ± 16.0 GPa, 1.5 ± 0.1 × 10−3 Ω cm, 1.3 ± 0.1, and......
L-PBF of 4340 Low Alloy Steel: Influence of Feedstock Powder, Layer Thickness, and Machine Maintenance
Journal of Materials Engineering and Performance - Tập 28 - Trang 693-700 - 2018
Laser powder bed fusion (L-PBF) is an additive manufacturing process in which a 3D part is fabricated by fusing metal powder together layer by layer. L-PBF has many variables which contribute to part performance, which include powder properties, process parameters, and machine condition. L-PBF is a relatively expensive process compared to traditional manufacturing. Feedstock material and build tim......
Modeling of Powder Bed Manufacturing Defects
Journal of Materials Engineering and Performance - - 2017
Powder bed additive manufacturing offers unmatched capabilities. The deposition resolution achieved is extremely high enabling the production of innovative functional products and materials. Achieving the desired final quality is, however, hampered by many potential defects that have to be managed in due course of the manufacturing process. Defects observed in products manufactured via powder bed ......
Correlation for estimating the effects of temperature on the viscosity of light hydrocarbon solvents
Journal of Materials Engineering and Performance - Tập 15 Số 1 - Trang 13-18 - 2006
Viscosity-temperature correlation has been developed for light hydrocarbon solvents. The correlation is based on one-parameter viscosity model developed by Puttagunta et al. (Chem. Eng. Res. Des., Vol 70, 1992, p 627–631) for conventional crude oils, which has been modified by incorporating a solvent viscosity reduction factor, Ф. The correlation was compared with the model of Puttagunta et al. on......
Vacuum Melt Infiltration of 2D Tyranno SA3 Ceramic Matrix Composites with Cr-25(wt.%)Si Intermetallic Alloy
Journal of Materials Engineering and Performance - Tập 32 - Trang 4724-4736 - 2022
The potential and limitations of vacuum melt infiltrating woven preforms of 2D Tyranno SA3 (Trademark of Ube Industries, Ltd., Tokyo, Japan.) fibers with Cr-25(wt.%)Si alloy were investigated. Microstructural observations revealed that the volume fractions of open voids infiltrated by the molten metal varied between 3.7 and 10.0% irrespective of the magnitudes of the melt infiltration temperatures......
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