Cristal Metals Inc.

Woodridge, IL, United States

Cristal Metals Inc.

Woodridge, IL, United States

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Xu X.,Shanghai JiaoTong University | Han Y.,Shanghai JiaoTong University | Li C.,Illinois Institute of Technology | Nash P.,Illinois Institute of Technology | And 2 more authors.
Journal of Materials Research | Year: 2015

The flow behavior of forged commercial purity (CP) titanium powder compact was studied by developing a processing map. CP titanium powder was sintered to 94% relative density, then hot compressed in a Gleeble thermal-mechanical simulator at strain rates ranging from 0.001 to 10 s-1 and deformation temperatures ranging from 600 to 800 °C. The hot forging process improved the densification to 98-99.9% and reduced the grain size from 93 to 10 μm by the occurrence of dynamic recrystallization. The fully dynamic recrystallization region is in the range of deformation temperature of 750-800 °C and strain rate of 0.001-0.01 s-1, with a power dissipation efficiency higher than 40%, determined by constructing a processing map and analyzing the volume fraction of dynamic recrystallization. This research provides a guide for powder compact forging of power metallurgy titanium by providing the hot compression parameters, which can lead to an improved microstructure and densification. © 2015 Materials Research Society.


Mangabhai D.,Cristal Metals Inc. | Araci K.,Cristal Metals Inc. | Kamal Akhtar M.,Cristal Metals Inc. | Stone N.,CSIRO | Cantin D.,CSIRO
Key Engineering Materials | Year: 2013

The processing of titanium powder has been presumed to have potential to reduce the cost of final parts. The non-melt routes to efficient powder processing require consistent flow, adequate tap density and minimal pick-up of interstitial contaminants. The powder produced by the continuous sodium reduction of titanium tetrachloride has a coral-like morphology and low tap density. In order to achieve the potential of low cost parts, the powder will need to be modified to match the optimum feed conditions of the particular processing technique. The approaches to control interstitial pick-up will be discussed in the context of manufacturing technology: contribution of raw materials (10%), passivation (60%) and densification (30%). A comparison of densification with a change of milling fluid media (argon to water will be made with the unexpected decrease in oxygen pick-up when using water). Powder spheroidization via gas atomization of Armstrong Process® powder will be discussed. The product forms where the advantages of using powder can be exploited have to be carefully selected. Sheet is one such form: the results of using titanium powder to directly make titanium sheet will be presented. Copyright © 2013 Trans Tech Publications Ltd.


Mangabhai D.,Cristal Metals Inc. | Araci K.,Cristal Metals Inc. | Akhtar M.K.,Cristal Metals Inc.
Advances in Powder Metallurgy and Particulate Materials - 2013, Proceedings of the 2013 International Conference on Powder Metallurgy and Particulate Materials, PowderMet 2013 | Year: 2013

Titanium powder produced using the Armstrong Process has been presumed to have potential to reduce the cost of final parts. Net Shape or Near Net Shape processing offers the greatest value for powder conversion to final components. The non-melt routes to efficient powder processing require consistent flow, adequate tap density and minimal pick-up of interstitial contaminants. The powder produced by the continuous sodium reduction of titanium tetrachloride has a coral-like morphology and low tap density. In order to achieve the potential of low cost parts, the powder will need to be modified to match the optimum feed conditions of the particular processing technique. The approaches to control interstitial pick-up will be discussed in the context of manufacturing technology: contribution of raw materials (10%), passivation (60%) and densification (30%). A comparison of densification with a change of milling fluid media (argon to water will be made with the unexpected decrease in oxygen pick-up when using water). Powder spheroidization via gas atomization of Armstrong Process® powder will be discussed. The product forms where the advantages of using powder can be exploited have to be carefully selected.


Xu X.,Illinois Institute of Technology | Nash P.,Illinois Institute of Technology | Yan Y.,Illinois Institute of Technology | Mangabhai D.,Cristal Metals Inc. | Zwitter T.,Webster Hoff Corporation
Advances in Powder Metallurgy and Particulate Materials - 2013, Proceedings of the 2013 International Conference on Powder Metallurgy and Particulate Materials, PowderMet 2013 | Year: 2013

Titanium has been identified as one of the key materials with the required strength that can reduce the weight of vehicle components and thereby reduce energy consumption. Single press and sinter as a near net-shape powder metallurgy technique can provide cost effective components for vehicle applications. The process parameters for the production of parts from HDH blended Ti6Al4V and Armstrong prealloyed Ti6Al4V powders have been optimized to obtain the best combination of mechanical properties, microstructures, and chemistry. A prototype part for a truck application was produced from HDH blended Ti6Al4V powder and successfully tested.


Patent
Cristal Metals Inc. | Date: 2012-12-06

A titanium metal or a titanium alloy having submicron titanium boride substantially uniformly dispersed therein and a method of making same is disclosed. Ti power of Ti alloy powder has dispersed within the particles forming the powder titanum boride which is other than whisker-shaped or spherical substantially uniformly dispersed therein.


Patent
Cristal Metals Inc. | Date: 2014-10-23

A titanium base alloy powder is formed by subsurface reduction of a chloride vapor with a molten alkali metal or molten alkaline earth metal to form reaction products comprising pre-alloy particles and a salt of the alkali metal or the alkaline earth metal. A majority of the pre-alloy particles have a composition of at least 50% by weight of titanium, about 5.38% to 6.95% by weight of aluminum, and about 3% to 5% by weight of vanadium. The pre-alloy particles are recovered from the reaction products to produce a titanium base alloy powder containing less than about 200 ppm alkali or alkaline earth metal.


Patent
Cristal Metals Inc. | Date: 2014-07-28

A titanium metal or a titanium alloy having submicron titanium boride substantially uniformly dispersed therein and a method of making same is disclosed. Ti power of Ti alloy powder has dispersed within the particles forming the powder titanium boride which is other than whisker-shaped or spherical substantially uniformly dispersed therein.

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