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Introduction to Aerospace Materials by A Mouritz

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7

Processing and machining of aerospace metals

7.1 Introduction

Metals are not used in their as-cast condition for safety-critical aircraft structures or load-bearing jet engine components. The use of cast metal in the primary structures of commercial airliners is virtually nonexistent, and it is used sparingly in military aircraft. Cast metals are used in a small number of nonstructural components on aircraft and helicopters, but not in heavily loaded structures which require high strength and toughness. The mechanical properties of cast metals are not good enough for them to be used in aircraft structures without incurring a significant weight penalty. Instead, metals are processed after casting by plastic-forming operations which increase ...

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