Morphology transitions of deformation-induced thin-plate martensite in Fe–Ni–C alloys

1998 ◽  
Vol 46 (13) ◽  
pp. 4827-4834 ◽  
Author(s):  
D.F Li ◽  
X.M Zhang ◽  
E Gautier ◽  
J.S Zhang
Keyword(s):  
Thin Plate ◽  
Plate Martensite

Substructures of thin-plate martensite formed under applied plane stress at 4 K

1993 ◽  
Vol 28 (11) ◽  
pp. 1423-1428 ◽  
Author(s):  
Z.L. Xie ◽  
H. Hänninen ◽  
J. Pietikäinen
Keyword(s):  
Thin Plate ◽  
Plane Stress ◽  
Plate Martensite

Characterization of Substructure Evolution in Ferrous Lenticular Martensite

2010 ◽  
Vol 654-656 ◽  
pp. 1-6 ◽  
Author(s):  
Akinobu Shibata ◽  
Shigekazu Morito ◽  
Tadashi Furuhara ◽  
Tadashi Maki
Keyword(s):  
Plastic Deformation ◽  
Thin Plate ◽  
Growth Behavior ◽  
High Density ◽  
Plate Martensite ◽  
Careful Observation ◽  
Density Of Dislocations ◽  
Transformation Twins ◽  
The Difference

This study investigated the substructure evolution in lenticular martensite. The substructure of lenticular martensite changes from fine transformation twins in the midrib and twinned region to a high density of dislocations in the untwinned region during growth. On the basis of careful observation of the morphology and substructure of midrib and examination of the stress-induced growth behavior of thin plate martensite, we concluded that the midrib in lenticular martensite is thin plate martensite itself. Tangled and curved dislocations appeared near the martensite-austenite boundary of the untwinned region in Fe-33Ni and in the entire untwinned region in Fe-31Ni, because the martensite inherited the accommodation dislocations in the surrounding austenite. The difference of Ms temperature causes the difference in the substructure between Fe-33Ni and Fe-31Ni. The higher Ms temperature of Fe-31Ni induces the plastic deformation of the surrounding austenite at an earlier stage of transformation, resulting in the appearance of tangled and curved dislocations in the entire untwinned region.

Martensite Midrib in an Fe-1C-17Cr Stainless Steel

2011 ◽  
Vol 172-174 ◽  
pp. 67-72 ◽  
Author(s):  
Jer Ren Yang ◽  
Hsin Yi Lee ◽  
Hung Wei Yen ◽  
Hsiao Tzu Chang
Keyword(s):  
Stainless Steel ◽  
Thin Plate ◽  
Deformation Mode ◽  
Plate Martensite ◽  
Subsequent Growth ◽  
Preferential Position

An Fe-1.0C-17Cr (wt.%) stainless steel was subjected to subzero treatment to investigated the structure of martensite midrib. The midrib region appeared in the thin plate and lenticular martensites have been observed detailed by TEM. The TEM result reveals that the transformations of thin plate martensite and lenticular martensite are initiated at the same midrib region. The former keeps the lattice-invariant deformation mode of twinning during subsequent growth, whereas the latter combines both twinning and slip modes. Midrib region is a preferential position for carbide precipitations after tempering. M3C and M23C6carbide were found in this alloy, and related to the ferrite by Bagaryatsky OR and K-S OR, respectively.

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