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Home Material Sciences Cost-Effective Production Of Powder Metallurgy Titanium Components

Cost-Effective Production Of Powder Metallurgy Titanium Components

Description

The technology was based on the blended elemental PM method in its simplest press-and-sinter approach without application of any pressure or deformation during or after sintering (contributing to the cost-effectiveness of the approach). The distinctive feature of technology is employment of hydrogenated titanium powder instead of traditional titanium powder. Hydrogen has a major effect on synthesis improvement, providing production of alloys having 98.5- 99.5% density, the desired phase composition, microstructure and chemical homogeneity and relatively low impurity content to meet automotive application demands in the most cost-effective manner. It was shown that compacting pressures within a wide range of 400-900 Mpa doesn’t influence the final porosity of material produced using hydrogenated titanium. Thus, the density in various locations of a compact, exposed to different pressures, will be the same. Significant decrease in cost simultaneously with retaining of unique properties of titanium alloys provides expansion of sphere of titanium employment. Application of proposed technology for production of titanium automotive components and aerospace components for non critical application lead to decrease in weight and improvement of fuel consumption characteristics.

Innovative Aspect and Main Advantages

  • Employment of cost-effective hydrogenated titanium powder as starting material
  • Employment of blended elemental powder metallurgy approach in its simplest press-and-sinter option without hot deformation.
  • Attainment of high balance of mechanical properties of synthesized alloys, which rival those for corresponding compositions produced with ingot approach.

As an example, Ti-6AI-4V alloy (the "work horse" of the titanium industry) was synthesized using an approach based on hydrogenated titanium. The high density (99%) and fine microstructure (beta-grain size around 100 mm) achieved is a result of selection of the correct blend of hydrogenated titanium and alloying element powders both in proper particle sizes and correct sintering regime. With this approach, material with tensile and fatigue properties equivalent to those of ingot metallurgy (l/M) processing can be produced without any additional thermal or thermomechanical treatments: YS=840-860 MPa; US=940-990 MPa; El.=7-10%; RA=11-27%, fatigue endurance limit 500 MPa. Contrary, earlier work with 99% dense Ti-6AI-4V was reported only in research programs where post-sintering HIP was employed and/or much cleaner (low chlorine) starting materials were used making this P/M processing much more expensive.

Areas of Application

Automotive, aerospace and other industries.


Fig. 1 A principal scheme for hydrogenated
titanium powder production


Fig. 2 Titanium parts and components

Stage of Development

1. Patented.
2. Prototypes available for testing.
3. STCU - IPP partner project (P-143) aimed on development of large-scale industrial technology for titanium components manufacturing is successfully performed.

Contact Details

Institute for Metal Physics
Professor Orest M. Ivasishin
Address: 36, Vernadsky Str, Kiev, 03142, Ukraine
E-mail: This e-mail address is being protected from spambots. You need JavaScript enabled to view it
Tel: 380-44-424-2210
Fax: 380-44-424-3374

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