Numerical modeling of solidification and subsequent transformation of Fe-Cr-Ni alloys

Koseki, Takafumi; Matsumiya, Tooru; Yamada, Wataru; Ogawa, Tadao

doi:10.1007/bf02652305

Cited by 46 publications

(23 citation statements)

References 18 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Figure 4 shows the simulated results of Mn concentration in comparison with microsegregation values calculated by the other model equations mentioned above. [6] By the use of a similar method of analysis with consideration of solid-to-solid transformation (i.e., ␦-to-␥ transformation as well as liquid-to-solid transformation [7,8] ), the solidification structure of the welding of stainless steels was analyzed, and the residual ␦ fraction, which affects the weld cracking, was estimated to be in agreement with observations, as shown in Fig. 5.…”

Section: Microsegregation Analysis By the Finite Difference Methodsmentioning

confidence: 97%

See 1 more Smart Citation

Analyses of diffusion-related phenomena in steel process

Matsumiya

2005

J Phs Eqil and Diff

View full text Add to dashboard Cite

In steel production processes, there are various diffusion-related phenomena, and these are controlled to obtain the required steel quality. In the refining process, the slag-metal reaction that is controlled by the diffusion of various reactants and products in boundary layers in both the slag and metal side along the slag-metal interface is analyzed by a coupled reaction model. Solidification microsegregation is controlled by the solute diffusion in the liquid and solid phases, and various analytical microsegregation models have been proposed. The tertiary precipitation of nonmetallic inclusions is also affected by solute diffusion in the solid phase and is analyzed by a coupled precipitation model, the modified solidification segregation model. The formation of a carbon (C)-rich band structure along the centerline of steel plates and weld cracking are also prevented by regulating the diffusion of C by accelerated cooling and by encouraging hydrogen to diffuse out by preheating the weld part, respectively. A key element of intragranular ferrite precipitation for ferrite grain refinement is the formation of manganese (Mn)-depleted zone by slow Mn diffusion around a precipitate.

show abstract

Section: Microsegregation Analysis By the Finite Difference Methodsmentioning

confidence: 97%

“…5. [8] Regarding the diffusion-controlled transformation and precipitation analysis, DICTRA [9] is one of the integrated analytical software that is based on the combinations of multicomponent diffusion analysis by FDM and local thermodynamic equilibrium analysis at the interfaces.…”

Section: Microsegregation Analysis By the Finite Difference Methodsmentioning

confidence: 99%

Analyses of diffusion-related phenomena in steel process

Matsumiya

2005

J Phs Eqil and Diff

View full text Add to dashboard Cite

show abstract

“…It is also used to deal with multi-element and multi-phase groups. Later on, the numerical analysis of micro segregation incorporating state diagram calculations was made by Koseki et a/ 48 to improve the validity in dealing with multi-element groups. Non-equilibrium effect…”

Section: Micro Segregationmentioning

confidence: 99%

“…Even with ternary alloys, or alloys with larger numbers of main elements, when solute concentration is low enough not to take account of interactions among solute elements, and also when solidification occurs in a single phase, segregation in between arms can be independently predicted for each solute element by applying Equation [10] or [13]. Figure 13 59 14 Solidification path of Fe-18Cr-12Ni calculated by solidification simulation with Thermo Cale Inc. 48 the contribution of each element to the fall in solidification points of the interdendrite space. P is shown to contribute greatly, suggesting that it has a big effect on solidification micro cracking susceptibility.…”

Section: Solidification Pathmentioning

confidence: 99%

Solidification and solidification structure control of weld metals

Koseki

2002

Welding International

View full text Add to dashboard Cite

“…The microstructure of the lamella relates with the liquid phase in the quench process. 33,34) Therefore, it means that the secondary phase has not appeared yet. Such solute partitioning during solidification can lead to the micro-segregation and to the formation of non-equilibrium phases at the latter stages of the solidification.…”

Section: Srxrdmentioning

confidence: 99%

<I>In-Situ</I> Observation for Weld Solidification in Stainless Steels Using Time-Resolved X-ray Diffraction

Yonemura¹,

Osuki²,

Terasaki

et al. 2006

Mater. Trans.

View full text Add to dashboard Cite

Characterizing of directional solidification mode of Fe-Cr-Ni alloys during welding was performed using intense synchrotron radiation probe. Consequently, the crystal growth in the rapid solidification process was revealed in detail and the peak profile was systematically analyzed in order to acquire the essential information for controlling the weld microstructure. Then, the crystallization timing of the primary and secondary phases was discussed. Furthermore, the possibility of the lattice rotation to commensurate (i) each dendrite and (ii) crystallites in the dendrites is suggested.

show abstract

Numerical modeling of solidification and subsequent transformation of Fe-Cr-Ni alloys

Cited by 46 publications

References 18 publications

Analyses of diffusion-related phenomena in steel process

Analyses of diffusion-related phenomena in steel process

Solidification and solidification structure control of weld metals

<I>In-Situ</I> Observation for Weld Solidification in Stainless Steels Using Time-Resolved X-ray Diffraction

Contact Info

Product

Resources

About