Al-Cu Alloy Precipitation Sequence (GP Zone, θ Phases)

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Metallurgical Engineering > GATE 2020 > Precipitation Hardening

The sequence of precipitation during aging of Al-4 wt.% Cu alloy is:

GP zone → θ″ → θ′ → θ

GP zone → θ → θ′ → θ″

GP zone → θ′ → θ″ → θ

θ″ → θ′ → GP zone → θ

Correct : a

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