naa a22 4500 510771491 CHVBK 20180411083215.0 cr unu---uuuuu 180411e20130401xx s 000 0 eng 10.1007/s11837-013-0551-1 doi (NATIONALLICENCE)springer-10.1007/s11837-013-0551-1 Thermomechanical Behavior of Developmental Thermal Barrier Coating Bond Coats [Elektronische Daten] [Amit Pandey, Vladimir Tolpygo, Kevin Hemker] Thermal expansion, microtensile, and stress relaxation experiments have been performed to contrast and compare the thermal and mechanical response of two experimental (L1 and H1) coatings provided by Honeywell Corporation (Morristown, NY). Thermal expansion experiments reveal that both coatings have coefficients of thermal expansion (CTE) that vary with temperature and that the CTE mismatch between the coatings and superalloy substrate is significant in the case of L1 as compared to H1. Values of the 0.2% offset yield stress (YS), Young's modulus (E), and hardening exponent (n) are reported. Room-temperature microtensile experiments show higher strain hardening and a very low value of failure strain for L1 as compared to H1. At elevated temperatures, there is a significant decrease in the YS of as-received L1 for (924MPa at room temperature to 85MPa at 1000°C) as compared to H1. Finally, a power law creep description for high-temperature stress relaxation is developed and the measured values of the stress exponent (n=3) and activation energies (Q creep=200-250kJ/mol) are shown to be consistent with power law creep. TMS, 2013 Pandey Amit Department of Mechanical Engineering, The Johns Hopkins University, 21218, Baltimore, MD, USA aut Tolpygo Vladimir Materials and Process Engineering, Honeywell Aerospace, 85034, Phoenix, AZ, USA aut Hemker Kevin Department of Mechanical Engineering, The Johns Hopkins University, 21218, Baltimore, MD, USA aut JOM Springer US; http://www.springer-ny.com 65/4(2013-04-01), 542-549 1047-4838 65:4<542 2013 65 11837 https://doi.org/10.1007/s11837-013-0551-1 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s11837-013-0551-1 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Pandey Amit Department of Mechanical Engineering, The Johns Hopkins University, 21218, Baltimore, MD, USA aut NATIONALLICENCE 700 1- Tolpygo Vladimir Materials and Process Engineering, Honeywell Aerospace, 85034, Phoenix, AZ, USA aut NATIONALLICENCE 700 1- Hemker Kevin Department of Mechanical Engineering, The Johns Hopkins University, 21218, Baltimore, MD, USA aut NATIONALLICENCE 773 0- JOM Springer US; http://www.springer-ny.com 65/4(2013-04-01), 542-549 1047-4838 65:4<542 2013 65 11837 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer