International Publications

Wannasin J, Canyook R, Wisutmethangoon S, Flemings MC. “Grain refinement behavior of an aluminum alloy by inoculation and dynamic nucleation.” Acta Materialia, 61 (2013), pages 3897-3903.

Examines how inoculation and localized forced convection with rapid cooling increase secondary nuclei and refine the final aluminum microstructure.

Janudom S, Wannasin J, Basem J, Wisutmethangoon S. “Characterization of flow behavior of semi-solid slurries containing low solid fractions in high-pressure die casting.” Acta Materialia, 61 (2013), pages 6267-6275.

Studies gate speed and initial solid fraction as practical controls for slurry flow, gas porosity, shrinkage porosity and tensile properties.

Chucheep T, Wannasin J, Canyook R, Rattanochaikul T, Janudom S, Wisutmethangoon S, Flemings MC. “Characterization of Flow Behavior of Semi-Solid Slurries with Low Solid Fractions.” Metallurgical and Materials Transactions A, 44 (2013), pages 4754-4763.

Characterizes solid fraction, fluidity and microstructure in three commercial aluminum alloys, showing that even slurries near 30% solid can retain useful flow.

Wannasin J. “Applications of Semi-Solid Slurry Casting Using the Gas Induced Semi-Solid Technique.” Solid State Phenomena, 192-193 (2013), pages 28-35.

Reviews GISS applications across die, squeeze and gravity casting, including prosthetic adaptors, lapping plates, sacrificial anodes and armor plates.

Canyook R, Wannasin J, Wisuthmethangoon S, Flemings MC. “Characterization of the Microstructure Evolution of a Semi-solid Metal Slurry during the Early Stages.” Acta Materialia, 60 (2012), pages 3501-3510.

Uses rapid quenching to measure how solid fraction, particle density, size, shape and distribution evolve during the early stages of rheocasting.

Wannasin J, Thanabumrungkul S, Flemings MC. “Semi-solid die casting using the Gas Induced Semi-Solid (GISS) Technique.” Die Casting Engineer, NADCA, May 2012, pages 36-40.

Wannasin J, Janudom S, Rattanochaikul T, Canyook R, Burapa R, Chucheep T, Thanabumrungkul S. “Research and development of gas induced semi-solid process for industrial applications.” Transactions of Nonferrous Metals Society of China, 20 (2010).

Describes the GISS process, compatible alloys and forming methods, with emphasis on commercial use of slurries containing low solid fractions.

Canyook R, Petsut S, Wisutmethangoon S, Flemings MC, Wannasin J. “Evolution of Microstructure in Semi-solid Slurries of Rheocast Aluminum Alloy.” Transactions of Nonferrous Metals Society of China, 20 (2010), pages 1649-1655.

Tracks grain structure at different gas-injection times and identifies fragmentation by remelting as a likely mechanism behind globular structure formation.

Janudom S, Rattanochaikul T, Burapa R, Wisutmethangoon S, Wannasin J. “Feasibility of semi-solid die casting of ADC12 aluminum alloy.” Transactions of Nonferrous Metals Society of China, 20 (2010), pages 1756-1762.

Evaluates plunger speed, gate thickness and solid fraction, finding that GISS die casting can reduce porosity and blistering while improving microstructure uniformity.

Chucheep T, Burapa R, Janudom S, Wisuthmethangoon S, Wannasin J. “Semi-solid gravity sand casting using gas induced semi-solid process.” Transactions of Nonferrous Metals Society of China, 20 (2010), pages s981-s987.

Demonstrates feasible gravity sand casting with improved strength, elongation and casting yield compared with conventional liquid casting.

Thanabumrungkul S, Janudom S, Burapa R, Dulyapraphant P, Wannasin J. “Industrial development of gas induced semi-solid process.” Transactions of Nonferrous Metals Society of China, 20 (2010), pages s1016-s1021.

Reports integration of a GISS maker with conventional die-casting machinery and industrial production trials using aluminum 7075 and A356.

Wannasin J, Thanabumrungkul S. “Development of a semi-solid metal processing technique for aluminium casting applications.” Songklanakarin Journal of Science and Technology, 30 (2008), pages 215-220.

Wannasin J, Janudom S, Rattanochaikul T, Flemings MC. “Development of the Gas Induced Semi-Solid Metal Process for Aluminum Die Casting Applications.” Solid State Phenomena, 141-143 (2008), pages 97-102.

Introduces the GISS method and explains how fine gas bubbles create slurry in the ladle with minimal changes to a conventional die-casting cycle.

Wannasin J, Canyook R, Burapa R, Sikong L, Flemings MC. “Evaluation of Solid Fraction in a Rheocast Aluminum Die Casting Alloy by a Rapid Quenching Method.” Scripta Materialia, 59 (2008), pages 1091-1094.

Presents a thin-channel rapid-quenching method for measuring slurry solid fraction and reports agreement with the Scheil model after growth correction.

Wannasin J, Martinez RA, Flemings MC. “Grain refinement of an aluminum alloy by introducing gas bubbles during solidification.” Scripta Materialia, 55 (2006), pages 115-118.

Shows that gas-bubble agitation during solidification can produce a fully refined and homogeneous grain structure under suitable conditions.

Wannasin J, Martinez RA, Flemings MC. “A Novel Technique to Produce Metal Slurries for Semi-Solid Metal Processing.” Solid State Phenomena, 116-117 (2006), pages 366-369.

Reports a new agitation medium and method for efficiently producing metal slurry structures suitable for semi-solid processing.

Wannasin J, Schwam D, Yurko JA, Rohloff C, Woycik GG. “Hot Tearing Susceptibility and Fluidity of Semi-Solid Gravity Cast Al-Cu Alloy.” Solid State Phenomena, 116-117 (2006), pages 76-79.

Finds that semi-solid gravity casting of B206 aluminum-copper alloy can lower hot-tearing susceptibility while retaining sufficient mold-filling fluidity.

Wisutmethangoon S, Thongjan S, Mahathaninwong N, Plookphol T, Wannasin J. “Precipitation hardening of A356 Al alloy produced by gas induced semi-solid process.” Materials Science and Engineering A, 532 (2012), pages 610-615.

Investigates aging conditions, mechanical properties and precipitation hardening in semi-solid cast A356 alloy produced by GISS.

Mahathaninwong N, Zhou Y, Babcock SE, Plookphol T, Wannasin J, Wisutmethangoon S. “Creep rupture behavior of semi-solid cast 7075-T6 Al alloy.” Materials Science and Engineering A, 556 (2012), pages 107-113.

Compares creep behavior with commercial 7075-T651 and reports longer rupture life for semi-solid cast 7075-T6 at selected stress levels.

Mahathaninwong N, Plookphol T, Wannasin J, Wisutmethangoon S. “T6 heat treatment of rheocasting 7075 Al alloy.” Materials Science and Engineering A, 532 (2012), pages 91-99.

Determines solution and aging conditions for GISS-produced 7075 alloy and relates precipitate development to strength and elongation.

Kovac P, Sidjanin L, Rajnovic D, Savkovic B, Wannasin J. “The microstructure influence on the chip formation process of Al-Cu alloy cast conventionally and in semi-solid state.” Metalurgija, 51 (2012), pages 34-38.

Compares chip formation and built-up-edge behavior during machining of conventionally cast and semi-solid Al-Cu alloy.

Kongiang S, Plookphol T, Wannasin J, Wisutmethangoon S. “Effect of the two-step solution heat treatment on the microstructure of semisolid cast 7075 aluminum alloy.” Advanced Materials Research, 488-489 (2012), pages 243-247.

Shows how two-step solution treatment can improve eutectic dissolution while limiting coarse black-particle formation in 7075 aluminum.

McCuiston R, Ngernbamrung S, Dateraksa K, Sujirote K, Wannasin J, Sungkapun T. “Fabrication of high volume fraction SiCp / Al metal matrix composites.” Ceramic Engineering and Science Proceedings (2011), page 71.

Pannaray S, Wisutmethangoon S, Plookphol T, Wannasin J. “Microstructure evolution during solution heat treatment of semisolid cast 2024 aluminum alloy.” Advanced Materials Research, 339 (2011), pages 714-717.

Evaluates solution-treatment temperature and duration for semi-solid cast 2024 aluminum alloy and identifies a suitable treatment condition.

Mahathaninwong N, Wisutmethangoon S, Plookphol T, Wannasin J. “Influence of solution heat treatment on microstructures of semisolid cast 7075 aluminium alloy.” Advanced Materials Research, 339 (2011), pages 371-374.

Examines how solution-treatment time and temperature affect grain-boundary phases and coarse-particle formation in rheocast 7075 alloy.

Rattanochaikul T, Janudom S, Memongkol N, Wannasin J. “Development of aluminum rheo-extrusion process using semi-solid slurry at low solid fraction.” Transactions of Nonferrous Metals Society of China, 20 (2010), pages 1763-1768.

Studies plunger speed and slurry solid fraction in a laboratory rheo-extrusion process for producing aluminum rods.

Burapa R, Janudom S, Chucheep T, Canyook R, Wannasin J. “Effects of primary phase morphology on mechanical properties of Al-Si-Mg-Fe alloy in semi-solid slurry casting process.” Transactions of Nonferrous Metals Society of China, 20 (2010).

Links primary aluminum particle shape and size with tensile strength and elongation in GISS slurry squeeze-cast parts.

Kuntongkum S, Wisutmethangoon S, Plookphol T, Wannasin J. “Influence of heat treatment processing parameters on the hardness and the microstructure of semi-solid aluminum alloy A356.” Journal of Metals, Materials, and Minerals, 18 (2008), pages 93-97.