Microstructural investigation of Ti-48Al-2Cr-2Nb (at.%) obtained by powder metallurgy using hot uniaxial pressing Instituto Tecnológico de Aeronáutica - ITA

Format:

Conference/Event

Author/Creator:

Gonçalves, Felipe Fernando Ruiz, author.

Conference Name:

2008 SAE Brasil Congress and Exhibit (2008-10-07 : Sao Paulo, Brazil)

Language:

English

Physical Description:

1 online resource

Place of Publication:

Warrendale, PA SAE International 2008

Summary:

The aim of this paper is to analyze the microstructural development in samples of Ti-48Al-2Cr-2Nb (at.%) alloys obtained by powder metallurgy (P/M). This alloy has potential applications when high operating temperatures are required, e. g. turbines, aerospace applications, automotive engines valves and turbocharger rotors. The elementary powders were mixed for 1 hour, cold uniaxially pressed at 60 MPa and sintered at 1100°C, for 1 hour, under vacuum. Then, the specimens were milled and submitted to a second stage that included cold isostatic pressing (400 MPa) with subsequent hot uniaxial pressing (20 MPa), between 900 up to 1200°C, for 2 hours, in argon atmosphere. The alloys were characterized by XRD (X-ray diffraction), SEM (Scanning Electron Microscopy), EDS (Energy Dispersive Spectroscopy) and Vickers microhardness measurements. The results indicated the viability of the route and the tendency of a lamellar microstructure in high sintering temperatures

Notes:

Vendor supplied data

Publisher Number:

2008-36-0264

Access Restriction:

Restricted for use by site license