ISSN:
1573-4803
Source:
Springer Online Journal Archives 1860-2000
Topics:
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
Notes:
Abstract A study has been undertaken to examine the feasibility of using a powder metallurgy (P/M) approach for the fabrication of an orthorhombic (O; Ti2AlNb)-based titanium aluminide alloy intended for use as a matrix in a continuous fiber reinforced titanium matrix composite (TMC). Spherical powder of Ti-22Al-26Nb (at%) was produced using inert gas atomization. The atomized powder was sieved to −80 mesh (〈177 μm) size fraction and used in the fabrication of unreinforced “neat” panels via the tape casting process. Microstructural and phase chemistry examinations of the as-produced powder, thermally exposed powder and neat matrix were conducted using back-scatter electron scanning electron microscope (BSE SEM) imaging, wavelength dispersive spectroscopy (WDS), and TEM analysis. Mechanical behavior studies of the as-fabricated and heat treated neat material included: tensile, creep and isothermal fatigue. Results obtained for the P/M-based neat material were compared to previously obtained foil-based neat data, and to those property requirements necessary to be considered for use as a matrix in the fabrication of O TMCs.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1023/A:1004833629778
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