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5 2 3 . Secondary hardening in steels arises out of the Precipitation of fine alloy carbides at high temperatures Refinement of ferrite grain size
Secondary hardening in steels arises out of the
Precipitation of fine alloy carbides at high temperatures
Refinement of ferrite grain size by working
Decomposition of retained austenite upon heat treatment
Precipitation of complex intermetallic upon heat treatment
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