Comparative welding study of metal matrix composites with the MIG welding process, using direct and indirect electric ar
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he interaction parameter, eMn O , and equilibrium constant for Fe-36 pct Ni base were determined in the range of 0.1 ⬍ [pct Mn] ⬍ 5: eMn O ⫽ ⫺0.050 ⫾ 0.027, log KMn ⫽ ⫺1.90 ⫾ 0.070 2. The calculated equilibrium relationship between manganese and oxygen in Fe-36 pct Ni alloy is in good agreement with the experimental results. Fig. 2—Plot of log K⬘Mn vs ([pct Mn] ⫹ 3.43[pct O]) in liquid Fe-36 pct Ni at 1773 K.
Fig. 3—The comparison of experimental data with proposed deoxidation equilibrium relationship of manganese in liquid Fe-36 pct Ni at 1773 K.
shown in Figure 2. The result indicates that the equilibrium between manganese and oxygen in liquid Fe-36 pct Ni can be explained by the first-order interaction parameter even in the range of high manganese content. The terms eMn O and log KMn in Fe-36 pct Ni can be obtained from the slope and the intercept of y-axis simultaneously: eMn O ⫽ ⫺0.050 ⫾ 0.027, log KMn ⫽ ⫺1.90 ⫾ 0.070 The deoxidation equilibrium relationship between manganese and oxygen at 1773 K is shown as a solid line in Figure 3, which was calculated by Eq. [9] using the interaction parameter and the equilibrium constant determined in the present study. It was found that the calculated line (solid line) was in good accordance with the experimental data rather than the dashed line, which was obtained for Fe base using the data reported by JSPS.[7] In case of Fe base, log K⬘Mn is expressed to be log K ⬘Mn ⫽ log KMn(Fe) ⫺ eMn O ([pct Mn] Ni ⫹ 3.43 [pct O]) ⫺ (eNi Mn ⫹ eO ) [pct Ni]
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[10]
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Comparative Welding Study of Metal Matrix Composites with the MIG Welding Process, using Direct and Indirect Electric Arc ´ PEZ, R. GARCI´A, A. MANZANO, V.H. LO and E. BEDOLLA The interest in metal matrix composites (MMCs) such as Al/TiC, Al/SiC, and Al/Al2O3 began 20 years ago and the result is still interesting because these materials have suitable mechanical an
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