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Method of modifying thermal and electrical properties of multi-component titanium alloys

a technology of titanium alloys and thermal and electrical properties, which is applied in the field of improving the physical properties of titanium alloys, can solve the problems of low thermal conduct affecting heating rates and obtainable cooling rates, and high electrical resistivity of titanium alloys compared to steel and aluminum, so as to reduce electrical resistivity and increase thermal conductivity

Inactive Publication Date: 2012-05-17
FMW COMPOSITE SYST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Benefits of technology

[0007]As an illustrative example, the method of the present invention may be used to increase thermal conductivity and reduce electrical resistivity of multi-component titanium alloys such as Ti-6Al-4V (Ti-64) and Ti-6Al-2Sn-4Zr-2Mo(Ti-6242).

Problems solved by technology

Thermal conductivity of titanium alloys, however, is low compared to other structural metals such as steel and aluminum.
Low thermal conductivity of titanium alloys affects heating rates and obtainable cooling rates after processing and heat treatments.
Another drawback of titanium alloys is their high electrical resistivity compared to steel and aluminum.
High electrical resistivity limits the use of titanium alloys as electrical conductors.

Method used

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  • Method of modifying thermal and electrical properties of multi-component titanium alloys
  • Method of modifying thermal and electrical properties of multi-component titanium alloys
  • Method of modifying thermal and electrical properties of multi-component titanium alloys

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Embodiment Construction

[0018]Methods of increasing thermal conductivity and reducing electrical resistivity of multi-component titanium alloys such as Ti-6Al-4V (Ti-64) and Ti-6Al-2Sn-4Zr-2Mo (Ti-6242) are described hereinafter. These methods encompass two important elements:[0019]1) Incorporation of TiB precipitates into the titanium alloy matrix; and[0020]2) Alignment of TiB precipitates in the direction of interest via hot metalworking.

[0021]Introduction of boron into the titanium alloy composition to produce TiB precipitates can be accomplished by several different methods, such as casting, cast-and-wrought processing, powder metallurgy techniques such as gas atomization and blended elemental approach. The boron may be added to the titanium alloy in the liquid state, wherein the boron is completely dissolved in the liquid titanium alloy. The boron may be added to the titanium alloy through intermixing of solid powders, as by powder metallurgy. Regardless of the process used to add the boron to the tit...

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Abstract

A method of increasing the thermal conductivity and decreasing the electrical resistivity of a titanium alloy. Boron is introduced into the titanium alloy to produce TiB precipitates. The TiB precipitates are then aligned in a direction of metal flow by hot metalworking.

Description

BACKGROUND OF THE INVENTION[0001]1. Field of the Invention[0002]The present invention relates to a method of improving physical properties of titanium alloys and, more specifically, a method of increasing thermal conductivity and reducing electrical resistivity of articles made of titanium-based compositions.[0003]2. Description of the Background Art[0004]Titanium alloys offer attractive physical and mechanical property combinations that provide significant weight savings in various industries such as aerospace and space. Thermal conductivity of titanium alloys, however, is low compared to other structural metals such as steel and aluminum. Low thermal conductivity of titanium alloys affects heating rates and obtainable cooling rates after processing and heat treatments. Another drawback of titanium alloys is their high electrical resistivity compared to steel and aluminum. High electrical resistivity limits the use of titanium alloys as electrical conductors. There is a need, there...

Claims

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Application Information

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IPC IPC(8): C22F1/18C22C1/00
CPCB22F3/1039C22C1/0458C22C32/0073C22C32/0031C22C14/00C22F1/18B22D21/06C22C1/04
Inventor TAMIRISAKANDALA, SESHACHARYULU
Owner FMW COMPOSITE SYST