Revealing the influence of Mo addition on interphase precipitation in Ti-bearing low carbon steels

2021 ◽  
pp. 117475
Author(s):  
Haokai Dong ◽  
Hao Chen ◽  
Ahmadreza Riyahi khorasgani ◽  
Boning Zhang ◽  
Yongjie Zhang ◽  
...  
2014 ◽  
Vol 54 (2) ◽  
pp. 474-474 ◽  
Author(s):  
Naoya Kamikawa ◽  
Yoshihisa Abe ◽  
Goro Miyamoto ◽  
Yoshimasa Funakawa ◽  
Tadashi Furuhara

2020 ◽  
Vol 51 (12) ◽  
pp. 6149-6158
Author(s):  
Yongjie Zhang ◽  
Goro Miyamoto ◽  
Kunio Shinbo ◽  
Tadashi Furuhara

JOM ◽  
2021 ◽  
Author(s):  
Y.-J. Zhang ◽  
E. Chandiran ◽  
H.-K. Dong ◽  
N. Kamikawa ◽  
G. Miyamoto ◽  
...  

AbstractThe current understanding of the microstructural features and mechanical properties of micro-alloyed low carbon steels strengthened by interphase precipitation of nano-sized alloy carbides are critically reviewed in this paper. The experimental results obtained via advanced quantitative characterization have revealed that interphase precipitation is promoted at the ferrite/austenite interface with a relatively lower degree of coherency caused by the deviation from the exact Kurdjumov–Sachs orientation relationship. Its dispersion becomes refined by enlarging the driving force for its precipitation, as adjusted by changing the transformation condition and chemical composition. The occurrence of interphase precipitation can significantly increase the strength of steels due to its large precipitation strengthening, and maintain good ductility as a result of enhanced work-hardening and dynamic recovery in different stages of tensile deformation. Finally, the application of interphase precipitation to ferrite/martensite dual-phase steels, together with our outlook on the challenging points in future research, are briefly explained.


2014 ◽  
Vol 54 (1) ◽  
pp. 212-221 ◽  
Author(s):  
Naoya Kamikawa ◽  
Yoshihisa Abe ◽  
Goro Miyamoto ◽  
Yoshimasa Funakawa ◽  
Tadashi Furuhara

2015 ◽  
Vol 84 ◽  
pp. 375-384 ◽  
Author(s):  
Y.-J. Zhang ◽  
G. Miyamoto ◽  
K. Shinbo ◽  
T. Furuhara ◽  
T. Ohmura ◽  
...  

Author(s):  
F. A. Khalid ◽  
D. V. Edmonds

The austenite/pearlite growth interface in a model alloy steel (Fe-1lMn-0.8C-0.5V nominal wt%) is being studied in an attempt to characterise the morphology and mechanism of VC precipitation at the growth interface. In this alloy pearlite nodules can be grown isothermally in austenite that remains stable at room temperature thus facilitating examination of the transformation interfaces. This study presents preliminary results of thin foil TEM of the precipitation of VC at the austenite/ferrite interface, which reaction, termed interphase precipitation, occurs in a number of low- carbon HSLA and microalloyed medium- and high- carbon steels. Some observations of interphase precipitation in microalloyed low- and medium- carbon commercial steels are also reported for comparison as this reaction can be responsible for a significant increase in strength in a wide range of commercial steels.The experimental alloy was made as 50 g argon arc melts using high purity materials and homogenised. Samples were solution treated at 1300 °C for 1 hr and WQ. Specimens were then solutionised at 1300 °C for 15 min. and isothermally transformed at 620 °C for 10-18hrs. and WQ. Specimens of microalloyed commercial steels were studied in either as-rolled or as- forged conditions. Detailed procedures of thin foil preparation for TEM are given elsewhere.


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