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UNIT 21: MATERIALS ENGINEERING - FREE STUDY

1 unit 21: MATERIALS ENGINEERING unit code: F/601/1626 QCF level: 4 Credit value: 15 LEARNING OUTCOME 4 TUTORIAL 1 On successful completion of this unit a learner will: Understand the in-service causes of failure of ENGINEERING MATERIALS Causes of failure: failure of material categories (metals: ceramics, polymers and composites) creep, fatigue, impact, overstressing, corrosion, temperature, thermal cycling, residual stresses, stress relaxation, degradation (composition change), radiation, electrical breakdown, or combinations of these Service life: contributory effects of service conditions to failure inappropriate maintenance, inappropriate use, faults in manufacture, material selection and design faults, changes in service conditions such as environment, loading and temperature.

© www.freestudy.co.uk 5 2.3 CREEP Creep is a phenomenon where some materials change shape (usually growing longer) over a period of time, when a constant stress is ...

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