151 Cutting of metal foams

Conventional cutting and machining techniques (bandsawing, milling, drilling) cause severe surface distortion or damage to low-density metal foams. Accurate cutting is possible by electro-discharge machining (EDM), by chemical milling, by water-jet cutting or by the use of very high-speed fly-cutters. When making test samples of metal foams for characterization (see Chapter 3) it is important to use electro-discharge machining or chemical milling unless the samples are very large, because surface damage caused by other cutting methods influences the properties.

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