Pressure–composition isotherm curves of a Ti–H system above the eutectoid temperature

2016 ◽  
Vol 113 ◽  
pp. 150-153
Author(s):  
Chia-Chieh Shen ◽  
Kwen-Chou Wu
Keyword(s):  
Eutectoid Temperature

Microstructure Optimization in δ-TRIP Steels with Al and Nb

2018 ◽  
Vol 930 ◽  
pp. 501-506
Author(s):  
Eustáquio de Souza Baêta Júnior ◽  
Ramón Alves Botelho ◽  
Leonardo Sales Araújo ◽  
Luiz P. Brandão ◽  
Sergio Neves Monteiro
Keyword(s):  
Chemical Composition ◽  
Alloying Elements ◽  
Eutectoid Temperature ◽  
Transformation Induced Plasticity ◽  
Trip Steels ◽  
Plasticity Effect ◽  
Δ Ferrite ◽  
Areas Of Interest ◽  
Thermocalc Software ◽  
Strength And Ductility

δ-TRIP steel is a recent concept and has been developed over the last ten years aiming to combine good mechanical strength and ductility. This class of steels is multiphase and contains δ and α ferrites, as well as austenite, bainite and/or martensite. The TRIP (Transformation Induced Plasticity) effect is influenced by those phases proportion, which depends on alloying contents. This paper investigates a chemical composition that allows adequate proportion among the phases, optimizing the microstructures by means of computational methods. These microstructures are designed to contain between 10 to 50% austenite, 10 to 70% α-ferrite and 20 to 80% δ-ferrite at the eutectoid temperature. The ThermoCalc Software [1] was used to predict the fractions of the microconstituents, producing graphs describing areas of interest of microconstituents as function of alloying elements variations that leads to the desired microstructure. Results indicate that the designed volume of the phases can be found for certain proportions among the alloying elements, higher concentrations of Al and Nb combined with C allow or not the occurrence of carbides and other phases in smaller quantities.

Superplastic properties of Ti–45.2Al–3.5(Nb,Cr,B) sheet material rolled below the eutectoid temperature

2003 ◽  
Vol 348 (1-2) ◽  
pp. 15-21 ◽  
Author(s):  
V.M Imayev ◽  
R.M Imayev ◽  
A.V Kuznetsov ◽  
M.R Shagiev ◽  
G.A Salishchev
Keyword(s):  
Sheet Material ◽  
Eutectoid Temperature ◽  
Superplastic Properties

scholarly journals Effect of a High Magnetic Field on Eutectoid Point Shift and Texture Evolution in 0.81C-Fe Steel

2008 ◽  
Vol 2008 ◽  
pp. 1-6 ◽  
Author(s):  
Y.D. Zhang ◽  
C. Esling ◽  
M. Calcagnotto ◽  
M.L. Gong ◽  
H. Klein ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Texture Evolution ◽  
Transverse Field ◽  
Dipolar Interaction ◽  
Statistical Thermodynamic ◽  
Field Calculation ◽  
Eutectoid Temperature ◽  
Pole Figures ◽  
Magnetic Dipolar Interaction ◽  
The Magnetic Field

A 12 T magnetic field has been applied to the annealing process of a 0.81%C-Fe (wt.%). It is found that the magnetic field shifts the eutectoid carbon content from 0.77 wt.% to 0.83 wt.%. The statistical thermodynamic calculations were performed to calculate the eutectoid temperature change by the magnetic field. Calculation shows that the increase of the eutectoid temperature by a 12 T field is 29∘C. Synchrotron radiation measurements were performed to measure the pole figures of the samples and were analyzed by MAUD to determine the bulk texture of the ferrite phase In the field-treated and non field-treated samples. Results show that although there is no specific preferred orientation appearing by applying the magnetic field, slight enhancement of (001) fiber component occurs in both the sample normal direction (ND) and the transverse direction (TD). This effect might be related to the magnetic dipolar interaction between Fe atoms in the transverse field direction.

Effect of Divorced Eutectoid Transformation Temperature on Behaviour of Cementite Growth in GCr15 Steel

2011 ◽  
Vol 194-196 ◽  
pp. 296-300 ◽  
Author(s):  
Hong Bo Yang ◽  
Fu Xian Zhu ◽  
Xiang Hua Liu ◽  
Kuai She Wang
Keyword(s):  
Lower Limit ◽  
Transformation Temperature ◽  
Bearing Steel ◽  
Eutectoid Transformation ◽  
Eutectoid Temperature ◽  
Gcr15 Steel ◽  
Upper Limit ◽  
Gcr15 Bearing Steel ◽  
Different Temperatures

Cementite spheroidization of GCr15 bearing steel includes granulating and growth of cementite. The effects of divorced eutectoid transformation (DET) temperatures on growth of cementite were studied. It was found that the particles of cementite are fine and uniform when DET occurs at 690～720°С, and alloy elements mostly precipitate at different temperatures during cementite growth of GCr15 bearing steel; Cr and Si mostly precipitate in the eutectoid temperature upper limit, while Mn is in the eutectoid temperature lower limit.

Ductility in Zn-22%Al above the eutectoid temperature

1985 ◽  
Vol 72 (1) ◽  
pp. L9-L11 ◽  
Author(s):  
Peter K. Koenig ◽  
Farghalli A. Mohamed
Keyword(s):  
Eutectoid Temperature

Magnetic field induced pearlite transformation in Fe–0.47C–2.31Si–3.15Mn steel above the eutectoid temperature

2009 ◽  
Vol 525 (1-2) ◽  
pp. 42-47 ◽  
Author(s):  
Xiaoling Zhou ◽  
Rong Zhou ◽  
Pengxiang Zhang ◽  
Yehua Jiang ◽  
Zeng Li ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Eutectoid Temperature

An oxide electrolyte EMF study of the stability of wüstite around its eutectoid temperature

1986 ◽  
Vol 31 (7) ◽  
pp. 885-886 ◽  
Author(s):  
C. Mallika ◽  
R. Pankajavalli ◽  
O.M. Sreedharan
Keyword(s):  
Eutectoid Temperature ◽  
The Stability ◽  
Oxide Electrolyte
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