Towards nanoindentation at application-relevant temperatures - A study on CMSX-4 alloy and amdry-386 bond coat - (PPT)

摘要

CMSX-4 and an Amdry-386 bond coat were tested up to 1000°C. In CMSX-4, the peak hardness is at 400°C, in contrast to uniaxial tests peaking at 800°C. This is likely due to the complex stress state and work hardening in nanoindentation. In creep tests, the same variation in n with temperature is seen. In the MCrAlY bond coat, the measured data matches well to the limited. literature data in both hardness and stress exponent. This suggests high-temperature nanoindentation may be a powerful tool to characterise these coatings and provide valuable inputs for material, model and process optimisations.