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High-Strength Low-Alloy Steels for Automobiles: Microstructure and Mechanical Properties. [PDF]

Materials (Basel)
Ma G, Gao B, Chen Z, Li Y, Wu R, Gui H, Chu Z.   +6 more
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The mechanism of acicular ferrite in weld deposits

Current Opinion in Solid State and Materials Science, 2004
Abstract Research has shown that the acicular ferrite microstructure in steel weld metal, which provides an optimum combination of strength and toughness, is indeed intragranularly nucleated bainite. It is possible to maximize the content of acicular ferrite by increasing the intragranular nucleation sites while maintaining a critical weld metal ...
Sudarsanam Babu
exaly   +2 more sources

Effect of plastic deformation on the formation of acicular ferrite

Materials Science & Engineering A: Structural Materials: Properties, Microstructure and Processing, 2003
Abstract The effect of plastic deformation on the transformation of austenite to acicular ferrite in a Fe–Mn–Si–C alloy steel containing non-metallic inclusions was investigated. The transformation to acicular ferrite is retarded and the final fraction of acicular ferrite is reduced in plastically deformed austenite, which is a characteristic of a ...
H K D H Bhadeshia, H -C Lee
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Inoculated acicular ferrite microstructure and mechanical properties

Materials Science & Engineering A: Structural Materials: Properties, Microstructure and Processing, 2001
Abstract Low carbon–manganese wrought steels with three different microstructures were prepared by different thermomechanical treatments without changing the chemical composition and their mechanical properties were compared. The microstructure of fine interlocking acicular ferrite nucleated intragranularly at Ti2O3 inclusions shows higher strength ...
Dong Nyung Lee, Jin-Yoo Suh, Jung-Soo Byun   +2 more
exaly   +2 more sources

Effects of TiC on the microstructure and formation of acicular ferrite in ferritic stainless steel

International Journal of Minerals, Metallurgy and Materials, 2019
k]The formation mechanism of acicular ferrite and its microstructural characteristics in 430 ferrite stainless steel with TiC additions were studied by theory and experiment. Using an “edge-to-edge matching” model, a 5.25 mismatch between TiC (FCC structure) and fer-ritic stainless steel (BCC structure) was identified, which met the mismatch ...
Zhouhua Jiang, Hua-Bing Li, Guang Xu
exaly   +2 more sources

Acicular ferrite transformation in alloy-steel weld metals

Journal of Materials Science, 1991
In this paper, the morphology of acicular ferrite in alloy-steel weld metals has been investigated. The effect of the grain size of prior austenite on acicular ferrite transformation has also been studied. It is found that acicular ferrite can form in reheated weld metals when the austenite grain size is relatively large.
Harshad Bhadeshia, Bhadeshia H K D H, J R Yang   +2 more
exaly   +2 more sources

Lower acicular ferrite

Metallurgical Transactions A, 1989
An experiment has been designed to confirm that the mechanism of growth of acicular ferrite in steel welds is similar to that of bainite in ordinary steels. On the hypothesis that the growth mechanisms are identical, it was expected that if the carbon concentration of a weld is increased sufficiently, then for similar welding conditions, the ...
A. A. B. Sugden, H. K. D. H. Bhadeshia
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Thermodynamics of acicular ferrite nucleation

Materials Science and Technology, 1994
AbstractThe thermodynamic driving force necessary to stimulate the nucleation of acicular ferrite and bainite is investigated for a series of high strength weld metals, using a combination of dilatometry, scanning electron microscopy, and thermodynamic calculations.
G. I. Rees, H. K. D. H. Bhadeshia
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Stress and the acicular ferrite transformation

Materials Science and Engineering: A, 1992
Abstract Acicular ferrite is considered to be identical in transformation mechanism to bainite, except that it nucleates intragranularly on inclusions, and hence develops into a morphologically different microstructure. The transformation causes displacements which, on a macroscopic scale, are characteristic of an invariant-plane strain with a large ...
S.S. Babu, H.K.D.H. Bhadeshia
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Grain Size of Acicular Ferrite in Ferritic Weld Metal

Welding in the World, 2011
Morphologically, the acicular ferrite (AF) microstructure developed in ferritic weld metal has been widely described as having an “interlocking structure” or “basket weave structure,” following its fine nature of the optical microstructure revealed by 2 % Nital etching solution.
Ka Hee Kim, Jun Seok Seo, Changhee Lee, Hee Jin Kim   +3 more
openaire   +1 more source