Cold compaction study of Armstrong Process® Ti-6Al-4V powders

W. Chen; Y. Yamamoto; W. H. Peter; S. B. Gorti; A. S. Sabau; M. B. Clark; S. D. Nunn; J. O. Kiggans; C. A. Blue; J. C. Williams; B. Fuller; K. Akhtar

doi:10.1016/j.powtec.2011.08.007

Cold compaction study of Armstrong Process® Ti-6Al-4V powders

W. Chen, Y. Yamamoto, W. H. Peter, S. B. Gorti, A. S. Sabau, M. B. Clark, S. D. Nunn, J. O. Kiggans, C. A. Blue, J. C. Williams, B. Fuller, K. Akhtar

Research output: Contribution to journal › Article › peer-review

51 Scopus citations

Abstract

The Armstrong Process® developed by Cristal US, Inc./International Titanium Powder, is an innovative, low-cost technology for producing Ti and Ti alloy powders in a one-step, continuous process. In this work, Armstrong Ti-6Al-4V powders were characterized and the cold compaction behavior of the powders were investigated in detail. As-received as well as milled powders were uniaxially die-pressed at designated pressures up to 690. MPa to form disk samples with different aspect ratios. Samples with high aspect ratio exhibited non-uniform density along the pressing axis and the density distribution was consistent with the result predicted by finite element analysis. The model developed from the linear regression analysis on the experimental density data can be used to predict density of compacts with different aspect ratios. In the studied pressure range, an empirical powder compaction equation was applied to linearize the green density - pressure relationship. Cold compaction parameters were obtained for the as-received and milled Armstrong Ti-6Al-4V powders.

Original language	English
Pages (from-to)	194-199
Number of pages	6
Journal	Powder Technology
Volume	214
Issue number	2
DOIs	https://doi.org/10.1016/j.powtec.2011.08.007
State	Published - Dec 10 2011

Funding

This research is sponsored by the U.S. Department of Energy, Office of Energy Efficiency and Renewable Energy (EERE) Industrial Technologies Program , under contract DE-AC05-00OR22725 with UT-Battelle, LLC. Additional funding and collaboration with the SHaRE User Facility (microscopy) at ORNL is also acknowledged.

Funders	Funder number
U.S. Department of Energy
Office of Energy Efficiency and Renewable Energy	DE-AC05-00OR22725

Keywords

Armstrong process
Die-pressing
Powder metallurgy
Titanium alloys

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10.1016/j.powtec.2011.08.007

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title = "Cold compaction study of Armstrong Process{\textregistered} Ti-6Al-4V powders",

abstract = "The Armstrong Process{\textregistered} developed by Cristal US, Inc./International Titanium Powder, is an innovative, low-cost technology for producing Ti and Ti alloy powders in a one-step, continuous process. In this work, Armstrong Ti-6Al-4V powders were characterized and the cold compaction behavior of the powders were investigated in detail. As-received as well as milled powders were uniaxially die-pressed at designated pressures up to 690. MPa to form disk samples with different aspect ratios. Samples with high aspect ratio exhibited non-uniform density along the pressing axis and the density distribution was consistent with the result predicted by finite element analysis. The model developed from the linear regression analysis on the experimental density data can be used to predict density of compacts with different aspect ratios. In the studied pressure range, an empirical powder compaction equation was applied to linearize the green density - pressure relationship. Cold compaction parameters were obtained for the as-received and milled Armstrong Ti-6Al-4V powders.",

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AU - Sabau, A. S.

AU - Clark, M. B.

AU - Nunn, S. D.

AU - Kiggans, J. O.

AU - Blue, C. A.

AU - Williams, J. C.

AU - Fuller, B.

AU - Akhtar, K.

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N2 - The Armstrong Process® developed by Cristal US, Inc./International Titanium Powder, is an innovative, low-cost technology for producing Ti and Ti alloy powders in a one-step, continuous process. In this work, Armstrong Ti-6Al-4V powders were characterized and the cold compaction behavior of the powders were investigated in detail. As-received as well as milled powders were uniaxially die-pressed at designated pressures up to 690. MPa to form disk samples with different aspect ratios. Samples with high aspect ratio exhibited non-uniform density along the pressing axis and the density distribution was consistent with the result predicted by finite element analysis. The model developed from the linear regression analysis on the experimental density data can be used to predict density of compacts with different aspect ratios. In the studied pressure range, an empirical powder compaction equation was applied to linearize the green density - pressure relationship. Cold compaction parameters were obtained for the as-received and milled Armstrong Ti-6Al-4V powders.

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Cold compaction study of Armstrong Process® Ti-6Al-4V powders

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