The use of high quality or exotic materials such as heat resistant alloys, high strength steels, stainless and aluminium alloys provide many answers to designers requiring solutions to specific problems, especially in the aerospace industry. However, the downside is that they are often difficult and costly to machine and can pose tremendous problems to production engineers due to their machining characteristics. Machineability, swarf control, work‐hardening and surface finish are a few of the prime headaches facing the production people with drawn‐out cycle times, high tooling bills, low machine utilisation and constant attention geneate concern for management.
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