Sympathetic Nucleation of Ferrite

JOM ◽  
1956 ◽  
Vol 8 (10) ◽  
pp. 1216-1223 ◽  
Author(s):  
H. I. Aaronson ◽  
C. Wells
Keyword(s):  
Sympathetic Nucleation

Formation of bainite in ferrous and nonferrous alloys through sympathetic nucleation and ledgewise growth mechanism

1996 ◽  
Vol 27 (6) ◽  
pp. 1535-1545 ◽  
Author(s):  
Hong-Sheng Fang ◽  
Jia-Jun Wang ◽  
Zhi-Gang Yang ◽  
C. M. Li ◽  
Y. K. Zheng ◽  
...  
Keyword(s):  
Growth Mechanism ◽  
Nonferrous Alloys ◽  
Sympathetic Nucleation

Effect of Vanadium on Development of Acicular Ferrite Microstructure in Low Carbon Steel

2008 ◽  
Vol 135 ◽  
pp. 111-114 ◽  
Author(s):  
Hyung Ha Jin ◽  
Chan Sun Shin ◽  
Hu Chul Lee
Keyword(s):  
Carbon Steel ◽  
Acicular Ferrite ◽  
Low Carbon Steel ◽  
Isothermal Transformation ◽  
Low Carbon ◽  
Side Plate ◽  
Intragranular Ferrite ◽  
Microstructural Constituent ◽  
Austenite Grains ◽  
Sympathetic Nucleation

The influence of vanadium on the development of an acicular ferrite microstructure has been investigated in a low carbon steel. Optical and electron microscopy were carried out to identify the precipitates, inclusions and constituents of the acicular ferrite microstructures. By the addition of vanadium, the main microstructural constituent was changed from a side plate ferrite to an acicular ferrite. VCN precipitates, which were known to favor the nucleation of acicular ferrite, were formed on the (Mn,Si) oxide and MnS particles. The presence of vanadium in alloys suppressed the formation of a side plate ferrite and reduced the transformation of ferrite during an isothermal transformation. Nucleation of intragranular ferrite and a subsequent sympathetic nucleation of ferrite within austenite grains were favored in the vanadium containing steel and an acicular ferrite microstructure was developed.

Overview no. 57 Morphology, crystallography and kinetics of sympathetic nucleation

1987 ◽  
Vol 35 (3) ◽  
pp. 549-563 ◽  
Author(s):  
E.Sarath Kumar Menon ◽  
H.I. Aaronson
Keyword(s):  
Kinetics Of ◽  
Sympathetic Nucleation

Sympathetic nucleation: an overview

1995 ◽  
Vol 32 (3) ◽  
pp. 107-123 ◽  
Author(s):  
H.I. Aaronson ◽  
G. Spanos ◽  
R.A. Masamura ◽  
R.G. Vardiman ◽  
D.W. Moon ◽  
...  
Keyword(s):  
Sympathetic Nucleation

Theoretical Study on Sympathetic Nucleation VS Ledgewise Growth of Bainitic Ferrite in Steel

2003 ◽  
Vol 426-432 ◽  
pp. 1261-1266 ◽  
Author(s):  
Zhi Gang Yang ◽  
J.B. Yang ◽  
Hong Sheng Fang ◽  
Bing Zhe Bai
Keyword(s):  
Theoretical Study ◽  
Bainitic Ferrite ◽  
Sympathetic Nucleation

Grain Refinement Behavior of Pipeline Steel in Welding Heat Affected Zone

2008 ◽  
Vol 575-578 ◽  
pp. 741-746
Author(s):  
Sheng Fu Yu ◽  
Yi Lei ◽  
Zhi Yuan Li
Keyword(s):  
Heat Affected Zone ◽  
Physical Simulation ◽  
Pipeline Steel ◽  
Boundary Energy ◽  
Welding Process ◽  
Simulation Method ◽  
Image Analyzer ◽  
X80 Pipeline Steel ◽  
Electron Microscopes ◽  
Sympathetic Nucleation

Self refining grain behavior of X80 pipeline steel in the heat affected zone was studied systematically by physical simulation method. The sizes and distribution of the inclusions which promote intra-granular ferrite nucleation were measured using the automatic image analyzer, and the figures of the intra-granular ferrite which has self refining grain behavior were observed using transmission electron microscopes with energy dispersive X-ray spectroscopy, the fracture toughness values of the coarse grain zone in the HAZ were also measured. The results show that the welding thermal cycle has nearly no effect on the sizes and distribution of the inclusions in the HAZ. The reasons of self-refining grain in the HAZ are that the small non-metallic inclusions such as MnO、 TiO、MnS、CuS and （Mn，Cu）S in X80 pipeline steel ，which can induce the nucleation of intra-granular ferrite in the welding process, and sympathetic nucleation of intra-granular ferrite makes the coarse grains refined in the HAZ. First intra-granular ferrite has large boundary energy and high density dislocation, which induce the sympathetic nucleation of intra-granular ferrite.

Strain energy interactions, the To concept and sympathetic nucleation

1977 ◽  
Vol 11 (6) ◽  
pp. 485-490 ◽  
Author(s):  
K.C. Russell ◽  
D.M. Barnett ◽  
C.J. Altstetter ◽  
H.I. Aaronson ◽  
J.K. Lee
Keyword(s):  
Strain Energy ◽  
Sympathetic Nucleation
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