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Title: Mechanical characterization of parts produced by ceramic on-demand extrusion process

Authors:
ORCiD logo [1];  [1];  [1];  [2];  [2]
  1. Department of Mechanical and Aerospace Engineering, Missouri University of Science and Technology, Rolla MO USA
  2. Department of Materials Science and Engineering, Missouri University of Science and Technology, Rolla MO USA
Publication Date:
Sponsoring Org.:
USDOE
OSTI Identifier:
1401518
Grant/Contract Number:
FE0012272
Resource Type:
Journal Article: Publisher's Accepted Manuscript
Journal Name:
International Journal of Applied Ceramic Technology
Additional Journal Information:
Journal Volume: 14; Journal Issue: 3; Related Information: CHORUS Timestamp: 2017-10-20 17:17:36; Journal ID: ISSN 1546-542X
Publisher:
Wiley-Blackwell
Country of Publication:
United States
Language:
English

Citation Formats

Ghazanfari, Amir, Li, Wenbin, Leu, Ming, Watts, Jeremy, and Hilmas, Gregory. Mechanical characterization of parts produced by ceramic on-demand extrusion process. United States: N. p., 2017. Web. doi:10.1111/ijac.12665.
Ghazanfari, Amir, Li, Wenbin, Leu, Ming, Watts, Jeremy, & Hilmas, Gregory. Mechanical characterization of parts produced by ceramic on-demand extrusion process. United States. doi:10.1111/ijac.12665.
Ghazanfari, Amir, Li, Wenbin, Leu, Ming, Watts, Jeremy, and Hilmas, Gregory. Mon . "Mechanical characterization of parts produced by ceramic on-demand extrusion process". United States. doi:10.1111/ijac.12665.
@article{osti_1401518,
title = {Mechanical characterization of parts produced by ceramic on-demand extrusion process},
author = {Ghazanfari, Amir and Li, Wenbin and Leu, Ming and Watts, Jeremy and Hilmas, Gregory},
abstractNote = {},
doi = {10.1111/ijac.12665},
journal = {International Journal of Applied Ceramic Technology},
number = 3,
volume = 14,
place = {United States},
year = {Mon Feb 27 00:00:00 EST 2017},
month = {Mon Feb 27 00:00:00 EST 2017}
}

Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record at 10.1111/ijac.12665

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  • The driving forces for this research were the need to produce simple and complex ceramic fine powders with high chemical purity, uniform particle size in the range of 0.1 to 1.0 [mu]m, and the ability to manipulate the composition to meet certain physical and electrical properties. An emulsion process has been developed for producing fine, uniform powders with sizes ranging from 200 to 100nm. The process is ideal for preparing both simple and complex compounds, including titanates, oxides, and superconductors.
  • In the present work, the microstructural evolutions and microhardness of AA1050 subjected to one, two and three passes of accumulative back extrusion (ABE) were investigated. The microstructural evolutions were characterized using transmission electron microscopy. The results revealed that applying three passes of accumulative back extrusion led to significant grain refinement. The initial grain size of 47 {mu}m was refined to the grains of 500 nm after three passes of ABE. Increasing the number of passes resulted in more decrease in grain size, better microstructure homogeneity and increase in the microhardness. The cross-section of ABEed specimen consisted of two different zones:more » (i) shear deformation zone, and (ii) normal deformation zone. The microhardness measurements indicated that the hardness increased from the initial value of 31 Hv to 67 Hv, verifying the significant microstructural refinement via accumulative back extrusion. - Highlights: Black-Right-Pointing-Pointer A significant grain refinement can be achieved in AA1050, Al alloy by applying ABE. Black-Right-Pointing-Pointer Microstructural homogeneity of ABEed samples increased by increasing the number of ABE cycles. Black-Right-Pointing-Pointer A substantial increase in the hardness, from 31 Hv to 67 Hv, was recorded.« less
  • Microstructures and room temperature mechanical properties of Mg-2.4Nd-0.6Zn-0.6Zr alloys prepared by a solid recycling process with different extrusion ratios were studied. The tensile properties of the materials were evaluated for the magnesium alloys in as-extruded and extruded-T6 conditions. With increasing extrusion ratio, the tensile strength and elongation to failure increases. The heat treatment results in a significant increase in tensile yield strength and ultimate tensile strength because of dispersive particles or fine precipitates. Moreover, the ductility decreases from as-extruded condition to extruded-T6 condition. The morphology of the fracture surfaces was examined by employing scanning electron microscope. The fracture mode ismore » a mix mechanism with brittle fracture and gliding fracture.« less
  • The strength and fracture toughness of a range of DMOX materials, with and without SiC particulates, have been measured. The strength has been shown to correlate with the SiC particulate size and to be consistent with a model based on the expansion misfit between the particulates and the matrix. The toughness has contributions for both the residual alloy and the SiC. The former has been shown to conform well with the expectations of models based on plastic dissipation in the alloy. The influence of the SiC is found to be strongly dependent on the particulate size and is qualitatively consistentmore » with a contribution to toughness from frictional dissipation at debonded SiC/Al2O3 interfaces. 14 refs.« less