COST 507 - Repositório Aberto da Universidade do Porto

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With Saunders [95Sau] assessment of the Ni-Ti binary there is better agreement for Dumitrescu's value for TiC, Fig.17. 5.4 The Fe-Ti-C system For Fe-Ti-C Jonsson [97Jon] obtained excellent agreement but we wanted to use the new description of TiC from Dumitrescu's assessment of Ti-C. It will now be demonstrated that introduction of the reassessment of the Fe-Ti system by Saunders [97Sau] compensates for the less negative value of A f "H and the agreement is still excellent. There is an isoactivity line for Ti in L and also information on the point L/graphite + TiC. Fig. 18 and Fig. 19 show that the same good fit can be obtained with Saunders' Fe-Ti and Dumitrescu's Ti-C if the ternary interaction for the L phase is reassessed. Recent reports on the solubility in fcc-Fe [92Bal] are also well described with Dumitrescu's choice, see Fig. 20. Here the ternary parameter is of some but less importance. There are also several expressions for the solubility product of TiC in fcc-Fe, [75Nar], [850ht], [67Irv], [65Chi] and [74Wil], see Table II. When interpreting them, one should realize that the solubility curve is not quite hyperbolic in this case because the solubility of TiC is much higher than of TiN. However, below x c =0.01 (m%C=0.2) it is fairly hyperbolic, see Fig. 20, and the expressions probably refer to such low C contents. A comparison is given in Table II. These expressions agree reasonably well with Ohtani's [850th] values which were considered in Fig. 20 and the assessments by Jonsson [96bJon] and by Dumitrescu [97Dum] are in close agreement with Ohtami's values. Table I. Solubility product of TiN in fcc-Fe The solubilities are low and the product should thus be reasonably constant at each temperature. With log(m%Tim%N)=A-B/T one has reported A B A-B/1473 Ref. 6.75 2.0 3.82 0.322 4.94 5.4 5.19 calculated calculated 19740 20790 15020 8000 14400 15790 15490 -6.65 -12.11 -6.38 -5.11 -4.84 -5.32 -5.33 -5.17 -5.87 [60Gur] [62Ada] [75Nar] [78Mat] [85Wad] [89Tur] [82Kun] [97Jon] present - 182 -
Table II. Solubility product of TiC in fccFe A 2.75 5.33 5.54 4.37 2.97 calculated calculated Β 7000 10475 11300 10580 6780 AB/1473 2.00 1.78 2.13 2.81 1.63 1.95 1.95 1.95 Ref. [67Irv] [75Nar] [75Nar] [65Chi] [74WÌ1] [850ht] [97Jon] present 6. Conclusion It seems that Jonsson's assessment of the whole TiN system can be retained for the time being. It could be argued that one should now reassess the TiN system using Jonsson's description of the TiN but with due account of the two new intermediate phases. However, it is recommended that this should be postponed until their range of existence in composition and temperature has been confirmed by independent measurements. Dumitrescu's assessment of the TiC system is recommended because it seems to be base on the best description of TiC. Jonsson tested his description of the TiC system on an assessment of TiCN and got an excellent result. However, it seems that with Dumitrescu's assessment of the TiC system it is also possible to get a reasonable assessment not only for TiCN but also for other MeTiC (where Me=Al, Ni, Fe) systems. Compared to FeTiC there is less information on the corresponding systems with the W or Co instead of Fe but they should be examined in this connection. It remains to try to reassess the WTiC and CoTiC systems with the new description of TiC and TiC. 7. References 51Hum Humphrey G.L., J.Am.Chem.Soc.73 (1951) 22612263 53Cad Cadoff I., Nielsen J.P., J.Metals 5 (1953) 248252 54Pal Palty A.E., Margolin H., Nielsen J.P., Trans ASM, 46 (1954) 312328 60Gur Gurevic J.G., Gernaya Metallurgija, No.6 (1960) 59 61Kel Kelley K.K., King E.G., Bull. US Bur.Mines 592 ( 1961 ) 61LOW Lowell CE., Williams W.S, Rev.Sci.Instrum.,32 (1961) 11201123 62Ada Adachi A. Mizukawa K., Kända K., Tetzu to Hagane, 48 (1962) 1436 65Chi Chino H., Wada H., Jawata Techn.Rep. 251 (1965)58175842 66Mor Morozova, M.P.,and Khernburg M.M., Russ.J.Phys.Chem. 40 (1966) 604606 67Irv Irvine K.J., Pickering F.B., Gladman T., J.Iron Steel Inst., 205 (1967) 161182 74Wil Williams , Harries , The Metals Soc. (1974) 152 183
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European Commission COST European c
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European Commission COST European c
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Preface The Final Workshop of the C
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COST 507 STRUCTURE Measurement and
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GRl: Mirtee S.A., Volos Mr.P.Polati
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D9 Dll Fl GR2 II NI S3 SF1 "Thermop
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A Summary of the COST 507 Action an
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Aluminium-based systems Titanium-ba
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An Example using the COST 507 Datab
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Appendix COST 507: Some Key Meeting
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Al - 0.5 Fe, 1 Mg, 0.8 Mn, 0.2 Si (
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Fig 4 Aluminium beverage cans. The
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Fig 6 High pressure compressor vane
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INTRODUCTION All of us are aware of
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In the interaction with materials a
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There was a first warning more than
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Some time ago, the well-known physi
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Today there is a whole range of ins
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The dimension of this reservoir inc
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REFERENCES [ 1 ] G. Petzow, "Man, M
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Trends in Application of Materials
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Raw Materials The Cycle of Material
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i LÌ i.'»Af·· iù^ VV.V.X. iTTa
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1600 OJ 1200 .« 1100 d 1000 900 Si
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Al Phase Relations in the Aluminium
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oundaries of the single phase regio
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Table 1 : Crystallographic Data of
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order to facilitate the evaluation
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(especially around 33 at% Mg) in or
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3.System Ti-Sn-Al-N. The investigat
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6) N.Durlu, U.Gruber, M.Pietzka, H.
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Summary of final report Directional
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calculate the thermodynamic mixing
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Introduction It is the aim of this
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Thermodynamic evaluations for high
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Figure 5 presents the calculated li
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There is a complete lack in the lit
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a.B5 ø.ia 0.15 0.20 0.25 0.30 0.35
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700 [53Phi] 800 +[90Kuz21 ]iquld a
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Thermodynamic Assessments, Experime
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AIN and TiNi_ x is also given. Vari
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satisfied the three requirements of
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84Bey R. Beyers, R. Sinclair, and M
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Material and Methods 2.1 Fabricatio
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3.4 Electronmicroscopy (SEM) and X-
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Tab. 3: Density of the Ti20Albase
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Tab.5. continued TÌ20A1 5CulONi Ti
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Fig. 3: ESMA and Xray diffraction
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Fig.7: Wetting angle of Ti 15A1 lOC
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Thermophysical Properties of Light
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Tab.2 Chemical composition of terna
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700 (AI)+AIFeS¡«_600 KS1275.1 l
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4.2 Thermal conductivity of industr
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4.3 AlSiZn alloys Electrical re
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94Jar/Bra G.Jaroma-Weiland, R.Brand
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MgZn9 (C 14) and Mg2Zn u in the Al
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The three Laves phases were describ
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References [13Ege] G. Eger, Z. Meta
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0.30 0.35 0.40 0.45 0.50 mole fract
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□ [48Koe] 600 500 400 0 0.1 0
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MggZn,, this work □ Single phase,
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Temperatures in °C 0.05 0.10 mole
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Table 2 : Alloy compositions Alloy
Page 135 and 136: All. Dy 50 Cpexp °C Cpadd Table 5
Page 137 and 138: Zn ¿Kl Si Fig. 2 : Position of the
Page 139 and 140: 22.5 ■■ 7.5 Temperature ICI Tem
Page 141 and 142: .to 2.5 "lõõ soo iÍOõ dOõ rtõ
Page 143 and 144: GR2 Differential Scanning Calorimet
Page 145 and 146: Time (x10 3 sec) Fig. 1. DSC Thermo
Page 147 and 148: solidification. It can be seen that
Page 149 and 150: 4. Conclusions Differential scannin
Page 151 and 152: COST 507 - ROUND Π UNIT II SEZIONE
Page 153 and 154: [96Sac] The Rrich regions of the
Page 155 and 156: List of publications in the framewo
Page 157 and 158: 2Contributions: oral or posters p
Page 159 and 160: 1996 REPORT 2 s ' PART: ACTIVITY CA
Page 161 and 162: [96Sei] Excess Gibbs energy coeffic
Page 163 and 164: List of publications in the framewo
Page 165 and 166: Proc. :7 th Meeting on "Syntheses a
Page 167 and 168: 2.1 Solid solubility measurements T
Page 169 and 170: eviews by Rivlin and Raynor [81 Riv
Page 171 and 172: inaires. Thesis, Universite Scienti
Page 173 and 174: Table 1. Review of the ternary phas
Page 175 and 176: L) Liq+bcc=FeSi+t_1 M) Liq+t 1=FeSi
Page 177 and 178: Extrapolations based on Ti-C-N S3 B
Page 179 and 180: value has been accepted in all thre
Page 181 and 182: with high precision whereas Jonsson
Page 183 and 184: only fit the hightemperature asym
Page 185: Jonsson combined his descriptions o
Page 189 and 190: Ti-C, Z.Metallkd. 86 (1995) 5 319
Page 191 and 192: 1000 1500 2000 2500 3000 Τ (K) Fig
Page 193 and 194: o Oí o 3 4 5 6 7
Page 195 and 196: M^øD^ O Kelley(1944) • Kelley an
Page 197 and 198: — cale, with Dumitrescu (1997) -
Page 199 and 200: € gfc-π m-, .-π-, π-π .-saa J
Page 201 and 202: +graph 0 TiN 0.2 0.4 0.6 X TiC 0.8
Page 203 and 204: Binder et al (1992) TiN 1423 K ■
Page 205 and 206: 0.08 600°C 700°C 800°C 900°C 10
Page 207 and 208: [59Sto]: Ä600°C □ 70D°C O8Q0°
Page 209 and 210: 2000 Cale, with Saunders (1997) —
Page 211 and 212: An Experimental Investigation of th
Page 213 and 214: An Experimental Investigation of th
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Page 217 and 218: EXPERIMENTAL INVESTIGATION OF THE C
Page 219 and 220: Fig.1 SEM micrographs of CuMgZr
Page 221 and 222: ■ 888 24 HSM^«" 16—19 3 À I
Page 223 and 224: Thermodynamic Evaluations of the Al
Page 225 and 226: Fcc_Al aves_C15 ONU ΔΝ12 αΝ13
Page 227 and 228: 2.2 Assessment The optimisation of
Page 229 and 230: 0.50 0.45 CulOZr7/ 0. 40 Or ^ 0.3
Page 231 and 232: References [71Kri] Kripyakevich, P.
Page 233 and 234: Kejun Zeng and Marko Hämäläinen,
Page 235 and 236: for detennining phase boundary and
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Table 2 Al-Fe-Mn results wt%Fe 0.5
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•00 Γ Ι I I I ~ LIQUID S^ 7iO
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the observed A2-B2 ordering. This p
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1473K Ahmed & Flower [94 Ahmi] 0.2
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900K Paruchuri & Massalski [91Par]
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BCC_B2#2 TI3RL TIPL BCC B2#2 TIRL
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0.2 0.3 0.4 0.5 X(LIQ,V) Figure 15
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1 Introduction and Overview of the
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at least 95% by Fe, possibly 99%, a
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8 References 43Phi H W L Phillips,
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1050 1000 Isopleth, Al - Si - 4 wt
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Al-Mn-Si 873 K 0.90 Liquid 0.80 0.7
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A Thermochemical Assessment of Data
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certainly due to the appearance of
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Materials Science Centre, November
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1400 Al-Mn Fig 2 Calculated partial
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1000 ι AlMn I Ι 950 Liquid E ω
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Al-Fe-Mn 843 K 0.90 0.80 0.70 0.60
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AlFeMn section at 2 wt% Mn co
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0.50 0.45 0.40-1 LU £ 0.35 LU 0.30
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European Commission EUR 18171 —CO
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NOTICE TO THE READER Information on
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