Titanium group powder metallurgy

a titanium group and powder metallurgy technology, applied in the field of high-performance powder metallurgy for titanium group metal alloys, can solve the problems of difficult economic elimination of porosity, difficult to achieve full density, and relative difficulty in manufacturing, and achieve good hardenability, cold formability, and high strength.

Inactive Publication Date: 2005-04-21
MYRICK JAMES J
View PDF7 Cites 166 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0058] Beta titanium alloys have good hardenability, and cold formability when they are solution-treated, and high strength when they are aged. Beta alloys tend to be denser than other titanium alloys but have high yield strengths.
[0059] Zirconium alloys such as 99Zr, 1Nb and Zircaloy-2 98.5Zr0.1Cr0.1Fe and 0.05 Ni-1.4Sn have high temperature performance and are used for chemical and nuclear applications. Hf alloys have high reaction absorption for

Problems solved by technology

Titanium, zirconium and hafnium (Titanium Group) alloys have high utility, but are relatively difficult to fabricate because of their susceptibility to oxidation and reaction with other materials at their high melting and forging temperatures.
Powder metallurgy techniques include relatively simple procedures such as uniaxial powder compression in a mold followed by sintering at an elevated temperature somewhat below the melting point of the metal powder, as well as more complicated and expensive techniques such as hot isostatic pressing (HIPing) and metal injection molding (MIM).
However, it is difficult to economically eliminate porosity and achieve full density using strong titanium group metals, because their relatively high temperature performance and high yield strength, wh

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Titanium group powder metallurgy
  • Titanium group powder metallurgy
  • Titanium group powder metallurgy

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0111] Al85Ni5Y8Co2 fully amorphous alloy has a glass transition temperature Tg of 538° K., a relatively high strength of 1250 MPa at room temperature and a relatively wide and a 38° K. supercooled liquid region [Y. Kawamura, et al, “Nanocrystalline Aluminum Bulk Alloys With A High Strength Of 1420 Mpa Produced By The Consolidation Of Amorphous Powders”, Scripta mater. 44 (2001) 1599-1604; A. Inoue, et al., Mater. Trans. JIM. 31, 493 (1990).]. Its initial crystallization occurs through the precipitation of fcc-Al particles while retaining viscous flow in the supercooled liquid region [Y. Kawamura, et al, Int. J. Powder Metall. 33, 50 (1997); Y. Kawamura, et al, J. Jpn. Soc. Powder Powder Metall. 38, 948 (1991); Y. Kawamura, et al, Mater. Trans. JIM. 40, 749 (1999)], and accordingly is used as a minor BMG component with a large volume of crystalline titanium powder.

[0112] A one Kg ingot of an Al85Ni5Y8Co2 (at %) alloy is prepared by arc melting a mixture of the pure elements. The in...

example 2

[0114] 200 grams of SiBNC fibers having a tensile strength of 2-4 GPa, a density of 1.8 / cm3, a diameter of 8-14 microns [See e.g., H. P. Balddus, et al., “Properties of Amorphous SiBNC-Ceramic Fibers”, Key Engineering Materials, Vol. 127-131, pp. 177-184 (1977)] are aligned in a blend of 900 grams of CP titanium powder and 100 grams of a BMG alloy powder, by weight, based on the total powder weight. The BMG alloy powder is Ti50Cu20Ni24Si4B2 (atomic percent), having a Tg of about 745° K. and a supercooled liquid region of about 65° K. The aligned fibers and powder blend are compressed between sheet platens under vacuum at a temperature of 8000 K, at a compression pressure of 465 MPa to produce a fully dense sheet “tape” with a monolayer of aligned fibers. The sheet is removed from the platen press and subsequently heated in an inert temperature to a temperature of about 1200° C. to form a fiber-reinforced, high-temperature composite, in which the fibers are embedded in a matrix havin...

example 3

[0115] 89 grams of a titanium alloy powder which is 96.4 atomic percent titanium and 3.6 atomic percent vanadium is blended with 11 grams of a bulk metal glass powder having a composition of A194V4Fe2 atomic percent. The 100 grams of the powder blend is compressed in a gear-shaped mold under vacuum at a compression pressure of 25 kSI, at a temperature 25° above the glass transition temperature Tg of the amorphous alloy to form a substantially fully dense gear component. The gear is removed from the mold, and heated in a vacuum furnace to a temperature of 1000° C. to first crystallize the BMG and then reactively diffuse it with the Ti alloy powder, to form an alloy with a nominal composition in weight percent of 89.6Ti, 6.09Al, 4.04V and 0.27Fe.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

PropertyMeasurementUnit
Fractionaaaaaaaaaa
Percent by volumeaaaaaaaaaa
Percent by volumeaaaaaaaaaa
Login to view more

Abstract

Methods and compositions relating to powder metallurgy in which an amorphous-titanium-based metal glass alloy is compressed above its glass transition temperature Tg with a titanium alloy powder which is a solid at the compression temperature, to produce a compact with a relative density of at least 98%.

Description

CROSS REFERENCE TO RELATED APPLICATION [0001] This application claims the benefit of the filing date of U.S. Provisional Application No. 60 / 493,176 filed Aug. 7, 2003.FIELD OF THE INVENTION [0002] The present invention is directed to powder metallurgy, and more particularly, to high performance powder metallurgy for titanium group metal alloys. BACKGROUND OF THE INVENTION [0003] Titanium, zirconium and hafnium (Titanium Group) alloys have high utility, but are relatively difficult to fabricate because of their susceptibility to oxidation and reaction with other materials at their high melting and forging temperatures. [0004] Because of its relatively high temperature capability and high strength to weight ratio, titanium and its alloys are desirable for a variety of aerospace, industrial, marine, military and commercial applications where weight and / or high temperature performance are important, such as fan blades, compressor blades, discs, hubs and other components of turbine engin...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): B22F1/08
CPCB22F1/0003B22F2999/00B22F9/002B22F1/09B22F1/08
Inventor MYRICK, JAMES J.
Owner MYRICK JAMES J
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap