COST 507 - Repositório Aberto da Universidade do Porto

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Two sets of experiments using the differential scanning calorimeter (DSC) were measured in the Cu-Li-Mg system. The first set of experiments for the samples N11 to N43 (13 samples) was carried out using the apparatus provided by Perkin-Elmer model 7 Series at the Helsinki University of Technology (HUT). The second set of experiments for the samples Nil to N40 (11 samples) was measured using the apparatus provided by Shimatsu-50 at the University of Porto (Porto). The samples Nil to N43 were studied using sealed aluminium and stainless steel crucibles under argon (purity 99.99 vol.%) atmosphere. The samples Nl 1 to N43 were studied using stainless steel crucibles under helium (99.9999 vol.%) atmosphere. 1.2 Assessment The evaluation of the Cu-Li-Mg system was based on the DSC experiments. The experimental datafile was created using the onset or peak values from the temperatures of the phase transformations and the enthalpy values which were calculated from the surface area of the peaks obtained. The reference states used in the optimisation for the enthalpy values were Bcc_A2 (Li), Fcc_Al (Cu), Hcp_A3 (Mg). The estimated experimental errors were ±5 K for the temperatures and ±10 at.% for the enthalpy measurements. Figure 1 shows the calculated phase diagram with 8 at.% Li and the decomposition of the τ (Cu32LigMg6o) phase at 702.7 K. 1300 0.2 0.4 0.6 0.8 MOLE FRACTION MG Figure 1. The assessed Cu-Li-Mg phase diagram with 8 at.% Li. - 220 -
Fcc_Al aves_C15 ONU ΔΝ12 αΝ13 φΝ14 χΝ15 Ν16 Ν20 *Ν34 ΧΝ36 Ν38 *Ν40 γ ΙΝ42 ΜΝ43 XS30 CuMg2 MOLE FRACTION MG 1.0 Figure 2. The isothermal section of the Cu-Li-Mg system at 370 °C. Figure 2 shows the isothermal cut at 370 °C with the experimental data used. The phase boundaries in the system were in good agreement with the experimental values obtained. However, there were some differences concerning the phase boundaries compared with the phase diagram by Melnik [76Mel]. According to the results from the X - ray analysis at 643 Κ the sample N15 had the same phase composition as calculated one in Figure 2. Sample N16 was close to the two phase boundary between the τ and CuMg 2 phases. The sample N38 had the same phase composition as calculated one but the samples N36, N42, N43 had different compositions. Table 1 shows the calculated and the experimental values obtained in the four phase equilibria in Figure 1 using the assessed excess Gibbs energy parameters. The estimated error of the invariant temperatures was ±1 K. The calculated values in the four phase equilibria are close to the experimental values. Table 1. The experimental and calculated temperatures in the invariant four phase equilibria. PHASES Bcc_A2, CuMg2, Laves_C15, Cu32Li8Mg60 Bcc_A2, CuMg2, Laves_C15, Liquid#l Bcc_A2, CuMg2, Hcp_A3, Liquid#l CuMg2, Laves_C15, Liquid#l, Liquid#2 T(EXP)/K 703.7 761.2 - 800.7 T(CALC)/K 702.7 762.8 776.7 799.2 - 221 -
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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
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All. Dy 50 Cpexp °C Cpadd Table 5
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Zn ¿Kl Si Fig. 2 : Position of the
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22.5 ■■ 7.5 Temperature ICI Tem
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.to 2.5 "lõõ soo iÍOõ dOõ rtõ
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GR2 Differential Scanning Calorimet
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Time (x10 3 sec) Fig. 1. DSC Thermo
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solidification. It can be seen that
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4. Conclusions Differential scannin
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COST 507 - ROUND Π UNIT II SEZIONE
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[96Sac] The Rrich regions of the
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List of publications in the framewo
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2Contributions: oral or posters p
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1996 REPORT 2 s ' PART: ACTIVITY CA
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[96Sei] Excess Gibbs energy coeffic
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List of publications in the framewo
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Proc. :7 th Meeting on "Syntheses a
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2.1 Solid solubility measurements T
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eviews by Rivlin and Raynor [81 Riv
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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 and 186: Jonsson combined his descriptions o
Page 187 and 188: Table II. Solubility product of TiC
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: Thermodynamic Evaluations of the Al
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
Page 237 and 238: Table 2 Al-Fe-Mn results wt%Fe 0.5
Page 239 and 240: •00 Γ Ι I I I ~ LIQUID S^ 7iO
Page 241 and 242: the observed A2-B2 ordering. This p
Page 243 and 244: 1473K Ahmed & Flower [94 Ahmi] 0.2
Page 245 and 246: 900K Paruchuri & Massalski [91Par]
Page 247 and 248: BCC_B2#2 TI3RL TIPL BCC B2#2 TIRL
Page 249 and 250: 0.2 0.3 0.4 0.5 X(LIQ,V) Figure 15
Page 251 and 252: 1 Introduction and Overview of the
Page 253 and 254: at least 95% by Fe, possibly 99%, a
Page 255 and 256: 8 References 43Phi H W L Phillips,
Page 257 and 258: 1050 1000 Isopleth, Al - Si - 4 wt
Page 259 and 260: Al-Mn-Si 873 K 0.90 Liquid 0.80 0.7
Page 261 and 262: A Thermochemical Assessment of Data
Page 263 and 264: certainly due to the appearance of
Page 265 and 266: Materials Science Centre, November
Page 267 and 268: 1400 Al-Mn Fig 2 Calculated partial
Page 269 and 270: 1000 ι AlMn I Ι 950 Liquid E ω
Page 271 and 272: Al-Fe-Mn 843 K 0.90 0.80 0.70 0.60
Page 273 and 274: 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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COST 507 - Repositório Aberto da Universidade do Porto

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