Influence of alloying elements upon the morphology of austenite formed from martensite in Fe-C-X alloys
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Influence of Alloying Elements upon the Morphology of Austenite Formed from Martensite in Fe-C-X Alloys
Fig. 1--(a) Fe-0.13 pct C-0.39 pct Mo, r e a c t e d 20 s at 760~ etched in BASP, Magnification 500 t i m e s , grain boundary a l l o t r i o m o r p h s (1) and idiomorphs (2) at f o r m e r austenite grain boundaries; (b) Fe-0.11 pct C-3.28 pct Ni, r e a c t e d 30 s, at 710~ etched in BASP, Magnification 500 t i m e s , i n t r a g r a n u lar idiomorphs and m a r t e n s i t e needle boundary a l l o t r i o m o r p h s ; (c) Fe-0.11 pct C-3.28 pct Ni, r e a c t e d 60 min at 710~ etched in BASP and 2 pct nital, Magnification 2000 t i m e s , growth of MNB a l l o t r i o m o r p h a c r o s s a f e r r i t e : f e r r i t e boundary.
Table I. Compositions and Homogenization Anneals of Alloys
W/O C
W/O X
W/O Mn
Homogenization Time at 1300~ W/O Si W/O P W/O S Days
0.11 0.11 0.12 O.11 0.12 0.13 0.29 0.13 0.12
1.83 pct Si 3.08pct Mn 3.28 pct Ni 0.99pct Co 0.39pct Mo 2.03pct A1 2.99 pct Cr 2.98pct Cu
0.01
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