38 Creep testing

Creep tests are performed using a standard testing frame which applies a dead load via a lever arm to a specimen within a furnace. The temperature of the furnace should be controled to within 1°C. Displacement is measured using an LVDT attached to the creep frame in such a way that although it measures the relative displacement of the specimen ends, it remains outside the furnace. Compression tests are performed by loading the specimen between two alumina platens. Tension tests are performed by bonding the specimens to stainless steel grip pieces with an aluminum oxide-based cement (e.g. Sauereisen, Pittsburg, PA). The steel pieces have holes drilled through them and the cement is forced into the holes for improved anchorage.

Data for creep of aluminum foams can be found in Chapter 9.

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