Partition of Mn during the growth of proeutectoid ferrite allotriomorphs in an Fe-1.6 at. pct C-2.8 at. pct Mn alloy

1987 ◽  
Vol 18 (9) ◽  
pp. 1547-1557 ◽  
Author(s):  
Masato Enomoto ◽  
H. I. Aaronson
Keyword(s):  
Ferrite Allotriomorphs ◽  
Proeutectoid Ferrite

Three-Dimensional Observation and Growth Kinetics of Proeutectoid Ferrite Formed at Austenite Grain Boundary in a Low Carbon Microalloyed Steel

2007 ◽  
Vol 539-543 ◽  
pp. 4578-4583 ◽  
Author(s):  
Kai Ming Wu ◽  
A.M. Guo ◽  
Lin Cheng
Keyword(s):  
Grain Boundary ◽  
Growth Kinetics ◽  
Three Dimensional ◽  
Low Carbon ◽  
Austenite Grain ◽  
Ferrite Allotriomorphs ◽  
Proeutectoid Ferrite ◽  
Carbon Microalloyed ◽  
Austenite Grain Boundary ◽  
Kinetics Of

Three-dimensional observations of proeutectoid ferrite formed at grain boundary in an Fe-0.09%C-1.48%Mn vanadium microalloyed alloy was revealed by techniques of serial sectioning along with computer-aided reconstruction. The ferrite allotriomorphs nucleated at grain boundary edges were approximately prolate ellipsoids. Not all the ferrite allotriomorphs formed at grain boundary faces were oblate ellipsoids. The growth kinetics of ferrite allotriomorphs nucleated at grain boundary edges was greater than that of ferrite allotriomorphs nucleated at grain boundary faces.

Substructure and Crystallography of Degenerate Pearlite in an Fe-C Binary Alloy

2007 ◽  
Vol 539-543 ◽  
pp. 4832-4837 ◽  
Author(s):  
Tadashi Furuhara ◽  
Tomokazu Moritani ◽  
K. Sakamoto ◽  
Tadashi Maki
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Growth Front ◽  
Isothermal Transformation ◽  
High Angle ◽  
Austenite Grain ◽  
Transmission Electron ◽  
Proeutectoid Ferrite ◽  
Lamellar Pearlite ◽  
Scanning Electron

Microstructures formed by degenerate pearlite transformation in an Fe-0.38mass%C alloy were studied by means of scanning electron microscopy (SEM) and transmission electron microscopy (TEM). Degenerate pearlite which contains fine cementite particles even at the growth front was observed with other structures such as proeutectoid ferrite, lamellar pearlite and bainite in a temperature range between 773K and 923K. As the isothermal transformation temperature is lowered, a fraction of the degenerate pearlite increases. The degenerate pearlite consists of ‘block’ (a region in which ferrite orientations are nearly the same) and ‘colony’ (a region containing cementite particles of nearly the same orientation), both of which are similar to those in lamellar pearlite. Block boundaries within an austenite grain are generally of high-angle type and their misorientations deviate largely from intervariant relationships for the K-S orientation relationship. In contrast, colony boundaries are of low-angle type. Cementite films are formed along those ferrite boundaries in the degenerate pearlite, presumably formed by encounter of the blocks or colonies.

Effect of Hot-Rolling Parameters on Microstructure and Mechanical Properties of 72LXA Steel Wire Rod

2012 ◽  
Vol 581-582 ◽  
pp. 842-846
Author(s):  
Jian Hua Zeng ◽  
Yi Chang Li ◽  
Zheng Zhou ◽  
Jun Chen
Keyword(s):  
Mechanical Properties ◽  
Hot Rolling ◽  
Steel Wire ◽  
Rolling Process ◽  
Impact Factors ◽  
Cooling Process ◽  
Controlled Cooling ◽  
Wire Rod ◽  
Microstructure And Mechanical Properties ◽  
Proeutectoid Ferrite

Effect of the laying head temperature and controlled cooling process on microstructure and mechanical properties of 72LXA wire rod were investigated．The results show that under the same cooling process，with the raising laying temperature and increasing sorbitizing rate and decreasing proeutectoid ferrite，the steel rod strength is improving，proeutectoid ferrite and sorbitizing rate are the critical impact factors on steel rod properties；indentifying cooling after perlite forming can restrain the dissolve of lamellar cementite；the mechanical properties of whole rod coil are improved by the proper rolling rate and air cooling．The high strength of 1050 MPa of steel rod was obtained，that shows the defined hot rolling process can conform to the steel rod properties requirement．

scholarly journals Super long-range diffusion of carbon during proeutectoid ferrite transformation

2019 ◽  
Vol 26 (3) ◽  
pp. 560-566
Author(s):  
Suo-quan Zhang ◽  
Si-hai Jiao ◽  
Jian-hua Ding ◽  
Di Wan ◽  
Zhen-yu Liu ◽  
...  
Keyword(s):  
Long Range ◽  
Ferrite Transformation ◽  
Proeutectoid Ferrite

Crystallography of grain boundary proeutectoid ferrite

1975 ◽  
Vol 6 (7) ◽  
pp. 1419-1429 ◽  
Author(s):  
A. D. King ◽  
T. Bell
Keyword(s):  
Grain Boundary ◽  
Proeutectoid Ferrite
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