It was found that remelting is the origin of grain refinement in undercooled Cu30Ni70 specimens. It was also demonstrated that composition difference across a dendrite is the cause of remelting. The critical undercooling, ΔT* for grain refinement is 145 K for undercooledCu30Ni70.

Topics
Supercooling, Metallurgy
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© 1995 American Institute of Physics.
1995
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