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A Microscopic Examination Of Void Formation In Superplastic Materials
Author(s) -
Langdon Terence G.
Publication year - 1979
Publication title -
journal of microscopy
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.569
H-Index - 111
eISSN - 1365-2818
pISSN - 0022-2720
DOI - 10.1111/j.1365-2818.1979.tb00188.x
Subject(s) - superplasticity , materials science , eutectic system , void (composites) , alloy , metallurgy , ductility (earth science) , composite material , creep
SUMMARY There are two distinct groups of superplastic materials, depending on whether the final fracture surface has a large cross‐sectional area at optimum ductility or the specimen gradually pulls down to a very fine point. Experiments on a commercial superplastic copper alloy and the Zn‐22% Al eutectoid indicate that the formation of internal voids is important in materials of both groups. In addition, the results show that the size and shape of the internal voids is dependent both on the material and the testing conditions.