Metal Casting Technologies : Whos who September 2012
52 www.metals.rala.com.au TEcHNicAL fEATURE 4. Concluding remarks 1. This technique may be suitable for use as a “Go: No-Go” tool by comparing characteristic curves with a reference curve from the same alloy with acceptable cleanliness. 2. Testing conditions such as vacuum pressure, melting temperature and chemical composition of test samples and reference samples must be suitably controlled to avoid misleading results caused by variations in liquid aluminium fluidity. 3. The metallographic analysis based on the standard PoDFA technique is still necessary in order to determine types and amount of oxides and inclusions content. This is very important for proper improvement of melt treatment practices toward favorable cleanliness. Acknowledgements This present investigation was sponsored by Foundry Engineering Laboratory, National Metal and Materials Technology Center (MTEC). n REFERENCES  M.B. Djurdjevic et al: “Melt Quality Control at Aluminum Casting Plants”. Association of Metallurgical Engineers of Serbia (AMES), MJoM 2010 Vol.16 (1), pp.63 -76.  D.V. Neff: “Evaluating Molten Metal Cleanliness for Producing High Integrity Aluminum Die Castings”. Die Casting Engineer, September 2004.  Xinjin Cao: “A New Analysis of Pressure Filtration Curves for Liquid Aluminum Alloys”. Scripta Materialia, 2005 Vol.52, pp.839–842.  P.G . Enright et al: “Characterisation of Molten Metal Quality Using the Pressure Filtration Technique”. American Foundry Society, 2003.  B. Prillhofer et al: “Nonmetallic Inclusions in The Secondary Aluminum Industry for The Production of Aerospace Alloys”. TMS, 2008, pp.603-608.  X. Cao: “A New Indirect Method of Measuring The Contents of Solid Inclusions in Liquid Aluminium Alloys”. J Mater Sci, 2006 Vol.41, pp.4285–4292.  X. Cao: “Pressure Filtration Tests of Liquid Al–Si Cast Alloys: I. Flow Behaviour”. Materials Science and Engineering A, 2005 Vol.403, pp.101-111.  X. Cao: “Pressure Filtration Tests of Liquid Al–Si Cast Alloys: II. Best-Fitted Equations for Filtrate Weight versus Filtration Time Curves”. Materials Science and Engineering A, 2005 Vol.403, pp.94- 100.  X. Cao et al: “Examination and verification of the filtration mechanism of cake mode during the pressure filtration tests of liquid Al–Si cast alloys”. Materials Science and Engineering A, 2005 Vol.408, pp.234-242.  C. Stanica et al: “Aluminum Melt Cleanliness Performance Evaluation Using PoDFA Technology”. U.P.B. Sci. Bull. Series B, 2009 Vol.71, pp.107-114  J. Wannasin et al” “Evaluation of Methods for Metal Cleanliness Assessment in Die Casting”. Journal of Materials Processing Technology, 2007 Vol.191, pp. 242-246.  L.Liu et al: “Assessment of Melt Cleanliness in A356.2 Aluminium Casting Alloy Using the Porous Disc Filtration Apparatus Technique: Part I Inclusion Measurements”. Journal of Materials Science, 1997 Vol.32, pp.5901-5925.  L.Liu et al: “Assessment of Melt Cleanliness in A356.2 Aluminium Casting Alloy Using the Porous Disc Filtration Apparatus Technique: Part II Inclusion Analysis”. Journal of Materials Science, 1997 Vol.32, pp.5927-5944.  K. Haberl et al: “Characterization of the Melt Quality and Impurity Content of an LM25 Alloy”, Metallurgical and Materials Transactions B, 2009 Vol.40B, pp.812-821. Mr. Thawatchai Khantisitthiporn e-mail : email@example.com Mr. Thawatchai Khantisitthiporn received his Bachelor and Master Degrees in Production Engineering and Metallurgical Engineering, respectively, from King Mongkut’s University of Technology Thonburi. His research thesis was based on a study of the mechanical metallurgy of wrought aluminium alloys for extrusion. He is a research engineer at MTEC, where his work involves processing of aluminium alloys with special emphasis on melt quality. dr. Julathep Kajornchaiyakul email : firstname.lastname@example.org Dr. Julathep Kajornchaiyakul graduated in 1992 with a B.Eng. in Metallurgical Engineering from Chulalongkorn University, Bangkok, Thailand. He then undertook post-graduate studies in the US obtaining his M.Sc. in “Mechanical Metallurgy: Deformation Processing of Metals” from the Colorado School of Mines, Golden in 1996, and his Ph.D. in “Brittle Materials Manufacturing: Abrasive Machining & Processing” at University of Connecticut in Storrs in June 2000. Since September 2000 he has been working as a R&D Engineer at MTEC – the National Metal and Materials Technology Center under the National Science and Technology Development Agency (NSTDA) of Thailand. He is now a Principal Researcher in the Design & Engineering Research Unit at MTEC working mainly on Foundry Engineering and Aluminium Processing. He is also the Research Unit Director. He is the current Chairperson of the Aluminium Technology Forum of Thailand and an Advisory Board Committee Member of the Thai Foundry Association (former Thai Foundrymen’s Society). He is also a member of the Technical Committer of the Federation of Thai Industry’s Clustering Development Board relating to Machinery and Metallurgical Industries.
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