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Tension and compression testing of single-crystalline gamma Ti-55.5 pct Al

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Abstract

High-quality single crystals 6 to 10 mm in diameter of γ-Ti 55.5 pct Al have been grown using the optical float zone furnace technique. These crystals have been oriented and cut into microsample tension and compression specimens with a gage area of 250×250 µm and an effective gage length of 300 µm. These specimens have been deformed using a microsample testing machine which applies loads on the order of 50 N and measures strain using an interferometric strain/displacement gage. Stress-strain curves have been obtained for four different orientations and two temperatures and as a function of the sense of the applied load. Of special interest is the availability of tensile data for the resolved shear stress. Preliminary comparison of tension and compression microsample tests indicates that the tension-compression asymmetry is negligible at 500 K.

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Authors and Affiliations

  1. the Department of Mechanical Engineering, The Johns Hopkins University, 21218-2686, Baltimore, MD

    Marc Zupan (Graduate Research Assistant) & K. J. Hemker (Associate Professor)

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  1. Marc Zupan
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  2. K. J. Hemker
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Additional information

This article is based on a presentation made in the symposium “Fundamentals of Gamma Titanium Aluminides,” presented at the TMS Annual Meeting, February 10–12, 1997, Orlando, Florida, under the auspices of the ASM/MSD Flow & Fracture and Phase Transformations Committees.

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Zupan, M., Hemker, K.J. Tension and compression testing of single-crystalline gamma Ti-55.5 pct Al. Metall Mater Trans A 29, 65–71 (1998). https://doi.org/10.1007/s11661-998-0159-1

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