Precipitation(2) - Immediately following quenching, take...

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Precipitation Hardening (Age Hardening)
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Hypothetical Binary Phase diagram
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T e m p r a t u Time Precipitation heat treatment Solution heat treatment Natural aging (Room Temperature Aging); T4 Artificial aging (Higher Temperature Aging); T6
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Phase diagram of Al-Cu 2024 Aluminum (Al 2 Cu) or 54wt%Cu
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Evolution of Microstructure
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Schematic of strength/hardness vs. time Y i e l d S t r n g h o H a s Log of Aging Time Guinier-Preston Zones Natural aging (Room Temperature Aging); T4 Artificial aging (Higher Temperature Aging); T6
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2014 Aluminum
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2014 Aluminum
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Experimental Procedure Solution treat the 2024 Al alloy specimens for 12 hours Quench all of the specimens in ice water
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Unformatted text preview: Immediately following quenching, take one Rockwell Hardness (HRB) measurement on the Natural Aging (room temp) specimen; Measure the hardness of the Natural Aging specimen at different times over the course of cooling according to the provided data sheet. Or Immediately following quenching, place the specimen in an preheated oven (Artificial Aging) for different times according to the provided data sheet. Quench the sample then make Rockwell Hardness (HRB) measurement....
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Precipitation(2) - Immediately following quenching, take...

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