Aluminium α grain refinement in A354 by rotating magnetic field (RMF)

被引：5

作者：

Fragoso, B. ^{[1
]}

Santos, H. ^{[1
]}

机构：

[1] Univ Porto, Fac Engn, P-4100 Oporto, Portugal

来源：

INTERNATIONAL JOURNAL OF CAST METALS RESEARCH | 2013年 / 26卷 / 04期

关键词：

Electromagnetic stirring; Grain refinement; Thermal analysis; Aluminium A354; THERMAL-ANALYSIS; SOLIDIFICATION; ALLOYS; A319;

D O I：

10.1179/1743133613Y.0000000052

中图分类号：

TF [冶金工业];

学科分类号：

0806 ;

摘要：

In this study, the authors show how to build an experiment that can impose rotating magnetic stirring during the solidification of a cylindrical cast with thermal data acquisition. Several experiments with increasing frequency and magnetic intensity were conducted. The discontinuous solidification curves of the castings were acquired by means of a thermocouple connected to a high resolution data recording system. It was found that the grain refinement is obtained by resorting to increasingly higher frequencies and intensities of the magnetic field. The dispersion of the grain size decreases in line with magnetic intensity and frequency. The thermal analysis revealed that important solidification events are conditioned by the magnetic field. Several proposals for grain refinement justification are advanced.

引用

页码：193 / 200

页数：8

共 20 条

[1] Electrical and thermal conductivity of A319 and A356 aluminum alloys
Bakhtiyarov, SI
Overfelt, RA
Teodorescu, SG
[J]. JOURNAL OF MATERIALS SCIENCE, 2001, 36 (19) : 4643 - 4648
[2] Boden S., 2009, P 6 INT C EL PROC MA, P261
[3] Grain refinement induced by electromagnetic stirring: A dendrite fragmentation criterion
Campanella, T
Charbon, C
Rappaz, M
[J]. METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE, 2004, 35A (10): : 3201 - 3210
[4] Quantification of the microconstituents formed during solidification by the Newton thermal analysis method
Cruz, H.
Gonzalez, C.
Juarez, A.
Herrera, M.
Juarez, J.
[J]. JOURNAL OF MATERIALS PROCESSING TECHNOLOGY, 2006, 178 (1-3) : 128 - 134
[5] Magnetohydrodynamics in materials processing
Davidson, PA
[J]. ANNUAL REVIEW OF FLUID MECHANICS, 1999, 31 : 273 - 300
[6] On the problems of thermal analysis of solidification
Diószegi, A
Svensson, IL
[J]. MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 2005, 413 : 474 - 479
[7] Determination of dendrite coherency point characteristics using first derivative curve versus temperature
Djurdjevic, M. B.
Sokolowski, J. H.
Odanovic, Z.
[J]. JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY, 2012, 109 (02) : 875 - 882
[8] Emadi D., 2004, Assoc. Metall. Eng. Serbia Montenegro, P91, DOI [10.30544/379, DOI 10.30544/379]
[9] Stability of axially symmetric flow driven by a rotating magnetic field in a cylindrical cavity
Grants, I
Gerbeth, G
[J]. JOURNAL OF FLUID MECHANICS, 2001, 431 : 407 - 426
[10] Effects and on-line prediction of electromagnetic stirring on microstructure refinement of the 319 Al-Si hypoeutectic alloy
Hernandez, F. C. Robles
Sokolowski, J. H.
[J]. JOURNAL OF ALLOYS AND COMPOUNDS, 2009, 480 (02) : 416 - 421

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