Work hardening of microwave sintered blended elemental Ti alloys

Microwave sintering (MWS) was used to consolidate hydride de-hydride Ti powder and blended elemental Ti6Al4V, Ti5Fe and Ti5Al5Mo5V3Cr (Ti5553) powder mixtures. The amount of powders used to prepare the powder compacts was scaled up to 500g.The effect of the MWS conditions on the relative density, porosity distribution, microstructure and tensile properties were studied. Furthermore, uniformity in distribution of the alloying elements was checked. For most of the materials considered, a combinations of sintering temperature of 1200oC and 1300oC and holding time of 5 to 30 min resulted in significantly improved density. Nevertheless sintering temperature of at least 1300oC was required for pore coalescence and high tensile properties.

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Mechanical behaviour of induction sintered blended elemental powder metallurgy Ti alloys

Materials Science and Engineering A ◽

10.1016/j.msea.2020.140157 ◽

2021 ◽

Vol 799 ◽

pp. 140157 ◽

Cited By ~ 1

Author(s):

S. Raynova ◽

F. Yang ◽

L. Bolzoni

Keyword(s):

Powder Metallurgy ◽

Mechanical Behaviour ◽

Elemental Powder ◽

Blended Elemental ◽

Ti Alloys ◽

Blended Elemental Powder

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The variation of work-hardening characteristics of Al–1wt% Si and Al–1wt% Si–0.1wt% Zr–0.1wt% Ti alloys

Physica B Condensed Matter ◽

10.1016/s0921-4526(01)01458-2 ◽

2002 ◽

Vol 315 (1-3) ◽

pp. 7-12 ◽

Cited By ~ 16

Author(s):

A.M. Abd El-Khalek

Keyword(s):

Work Hardening ◽

Ti Alloys

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Direct Observation of the Diffusionless β → β + ω Transformation in Titanium Alloys

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s0424820100064669 ◽

1971 ◽

Vol 29 ◽

pp. 122-123

Author(s):

N. E. Paton ◽

D. de Fontaine ◽

J. C. Williams

Keyword(s):

Electron Microscope ◽

Titanium Alloys ◽

Direct Observation ◽

Dark Field ◽

X Ray Diffraction ◽

Resistivity Measurements ◽

Selected Area Electron Diffraction ◽

Ti Alloys ◽

Thin Foils ◽

Field Device

The electron microscope has been used to study the diffusionless β → β + ω transformation occurring in certain titanium alloys at low temperatures. Evidence for such a transformation was obtained by Cometto et al by means of x-ray diffraction and resistivity measurements on a Ti-Nb alloy. The present work shows that this type of transformation can occur in several Ti alloys of suitable composition, and some of the details of the transformation are elucidated by means of direct observation in the electron microscope.Thin foils were examined in a Philips EM-300 electron microscope equipped with a uniaxial tilt, liquid nitrogen cooled, cold stage and a high resolution dark field device. Selected area electron diffraction was used to identify the phases present and the ω-phase was imaged in dark field by using a (101)ω reflection. Alloys were water quenched from 950°C, thinned, and mounted between copper grids to minimize temperature gradients in the foil.

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