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Development of a High-Temperature Tensile Tester for Micromechanical Characterization of Materials Supporting Meso-Scale ICME Models

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Abstract

A high-temperature tensile tester (HTTT) has been established for the evaluation of micro-mechanical properties of materials at the meso-scale. Metals and ceramics can now be tested at temperatures and strain rates between room temperature and 1200°C and 10−5 s−1 to 10−1 s−1, respectively. The samples are heated in a compact clam shell furnace and strain is measured directly in the sample gage with digital image correlation. The HTTT extracts representative mechanical properties, as evidenced by the similarity in the evaluated micro-tensile properties of a solid solution-strengthened Ni-base superalloy Ni-625 with that of the bulk. The effectiveness of the HTTT has also been demonstrated in evaluating the tensile and stress relaxation/short-term creep properties of a polycrystalline Ni-base superalloy René 88DT. The versatility in carrying out tensile, short-term creep, bend tests, and fracture toughness measurements makes the HTTT a robust experimental tool for small-scale and scale-specific benchmarking of multi-scale ICME models.

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Acknowledgements

This work has been supported through Grant No. 90058536 at Johns Hopkins University awarded by the Office of Naval Research, ONR. The authors thank Suman Dasgupta, Binwei Zhang, Stephen Ryan and Simon Lockyer-Bratton for their technical input, and undergraduate researchers Ben Long and Kevin Peters for helping with the experiments. Special thanks to Drs. Jeff Swab and Jim McCauley of ARL for providing us with the Y-TZP material and insights on the machining of ceramics. We also acknowledge A. Loghin, D. Konitzer, J. Williams and J. Marte of GE Global Research.

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  1. Department of Mechanical Engineering, Johns Hopkins University, Baltimore, MD, USA

    Zafir Alam, David Eastman, Minjea Jo & Kevin Hemker

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  1. Zafir Alam
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  2. David Eastman
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  3. Minjea Jo
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  4. Kevin Hemker
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Correspondence to Zafir Alam.

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Alam, Z., Eastman, D., Jo, M. et al. Development of a High-Temperature Tensile Tester for Micromechanical Characterization of Materials Supporting Meso-Scale ICME Models. JOM 68, 2754–2760 (2016). https://doi.org/10.1007/s11837-016-2100-1

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  • DOI: https://doi.org/10.1007/s11837-016-2100-1

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