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The continuous δ‐γ transformation during cooling of ferritic‐austenitic iron‐chromium‐nickel alloys
Author(s) -
Mundt Ronald,
Hoffmeister Hans
Publication year - 1983
Publication title -
archiv für das eisenhüttenwesen
Language(s) - English
Resource type - Journals
eISSN - 1869-344X
pISSN - 0003-8962
DOI - 10.1002/srin.198305252
Subject(s) - chromium , austenite , metallurgy , isothermal process , nickel , materials science , nucleation , supercooling , thermodynamics , microstructure , physics
Following previously published isothermal TTT diagrams, continuous TTT diagrams for the δ‐γ transformation of a series of different iron‐chromium‐nickel‐alloys containing 23.0–35.0 Cr and 6.45–15.6 Ni are presented. The microstructures and transformation behaviors indicate the same nucleation and growth process as in the isothermal reactions. The critical upper cooling rate for complete undercooling of the δ‐γ transformation decreases with increasing chromium‐ and decreasing nickel contents.