The Mechanical Properties of a PM1000 and PM2000Oxide-Dispersion-Strengthened Alloy tested by High Temperature Nanoindentation TestingWednesday (28.09.2016) 11:30 - 11:45 Part of:
A PM1000 and PM2000 oxide-dispersion-strengthened alloy (ODS) has been tested by nanoindentation testing in a novel xSOL 800 stage that allows testing samples under a controlled environment. These oxide dispersion strengthened alloys have grain size of around 1µm, and are candidate materials for high temperature application typically found in power plants or high temperature fuel cells. Beside the temperature dependence of hardness and indentation modulus, a careful analysis of time-dependent features such as creep and stress exponent was performed. The two samples are compared for a large temperature range.The H/E ratio demonstrates the relation of plastic and elastic deformation and is dominated by a transition from small hardness variations at low temperatures to a strong hardness decrease starting at about 400 °C for both alloys.