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Antonio J. Ramirez

  • Professor, Materials Science Engineering
  • WE Graduate Studies Chair
  • 1248 Arthur E. Adams Drive
    132 EJTC
    Columbus, OH 43221
  • 614-292-8662

About

Dr. Ramirez' research concentrates on the advanced characterization of different type of materials ranging from structural to functional. However, he devotes much of his effort to the study of metallic materials welded/joined using arc welding processes and solid state processes as friction stir welding. Such studies seek to unveil the fundamentals behind such processes effects on the materials structure and performance. For such work, he uses from conventional to advanced tools as transmission electron microscopy and synchrotron x-rays beamlines. As part of his work he has developed and widely applied  dedicated instrumentation and software to study materials phase transformations and performance on real time, using electron microscopes and synchrotron x-ray diffraction beam-lines.

Journal Articles

2016

  • Avila,Julian,A; Lucon,Enrico; Sowards,Jeffrey; Mei,Paulo,Roberto; Ramirez,Antonio,J, 2016, "Assessment of Ductile-to-Brittle Transition Behavior of Localized Microstructural Regions in a Friction-Stir Welded X80 Pipeline Steel with Miniaturized Charpy V-Notch Testing." METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE 47A, no. 6, 2855 - 2865.
  • Avila,Julin,A; Lima,Vinicius; Ruchert,Cassius,OFT; Mei,Paulo,Roberto; Ramirez,Antonio,J, 2016, "Guide for Recommended Practices to Perform Crack Tip Opening Displacement Tests in High Strength Low Alloy Steels." SOLDAGEM & INSPECAO 21, no. 3, 290 - 302.
  • Silva,Cleiton,C; Afonso,Conrado,RM; Ramirez,Antonio,J; Motta,Marcelo,F; Miranda,Helio,C; Farias,Jesualdo,P, 2016, "Assessment of microstructure of alloy Inconel 686 dissimilar weld claddings." JOURNAL OF ALLOYS AND COMPOUNDS 684, 628 - 642.

2015

  • Maya-Johnson,S; Ramirez,A,J; Toro,A, 2015, "Fatigue crack growth rate of two pearlitic rail steels." ENGINEERING FRACTURE MECHANICS 138, 63 - 72.
  • Avila,Julian,A; Ruchert,Cassius,OFT; Mei,Paulo,Roberto; Marinho,Ricardo,R; Paes,Marcelo,TP; Ramirez,Antonio,J, 2015, "Fracture toughness assessment at different temperatures and regions within a friction stirred API 5L X80 steel welded plates." ENGINEERING FRACTURE MECHANICS 147, 176 - 186.
  • Kellermann,G; Montoro,L,A; Giovanetti,L,J; dos Santos Claro,P,C; Zhang,L; Ramirez,A,J; Requejo,F,G; Craievich,A,F, 2015, "Controlled growth of extended arrays of CoSi2 hexagonal nanoplatelets buried in Si(001), Si(011) and Si(111) wafers." PHYSICAL CHEMISTRY CHEMICAL PHYSICS 17, no. 7, 4945 - 4951.
  • Rodriguez,J; Ramirez,A,J, 2015, "Microstructural characterisation of friction stir welding joints of mild steel to Ni-based alloy 625." MATERIALS CHARACTERIZATION 110, 126 - 135.

2012

  • Ospina,C,A; Terra,J; Ramirez,A,J; Farina,M; Ellis,D,E; Rossi,A,M, 2012, "Experimental evidence and structural modeling of nonstoichiometric (010) surfaces coexisting in hydroxyapatite nano-crystals." COLLOIDS AND SURFACES B-BIOINTERFACES 89, 15 - 22.
  • Stroppa,D,G; Hermenegildo,T; Unfried S,J; Oliveira,N; Ramirez,A,J, 2012, "The Effects of Rework on Brazing." WELDING JOURNAL 91, no. 2, 41 - 43.
  • Stroppa,Daniel,G; Zagonel,Luiz,F; Montoro,Luciano,A; Leite,Edson,R; Ramirez,Antonio,J, 2012, "High-Resolution Scanning Transmission Electron Microscopy (HRSTEM) Techniques: High-Resolution Imaging and Spectroscopy Side by Side." CHEMPHYSCHEM 13, no. 2, 437 - 443.
  • Kellermann,Guinther; Montoro,Luciano,A; Giovanetti,Lisandro,J; dos Santos Claro,Paula,C; Zhang,Liang; Ramirez,Antonio,J; Requejo,Felix,G; Craievich,Aldo,F, 2012, "Formation of an extended CoSi2 thin nanohexagons array coherently buried in silicon single crystal." APPLIED PHYSICS LETTERS 100, no. 6, 063116 -

2011

  • Da Silva,Rafael,O; Goncalves,Ricardo,H; Stroppa,Daniel,G; Ramirez,Antonio,J; Leite,Edson,R, 2011, "Synthesis of recrystallized anatase TiO2 mesocrystals with Wulff shape assisted by oriented attachment." NANOSCALE 3, no. 4, 1910 - 1916.
  • Stroppa,Daniel,G; Montoro,Luciano,A; Beltran,Armando; Conti,Tiago,G; da Silva,Rafael,O; Andres,Juan; Leite,Edson,R; Ramirez,Antonio,J, 2011, "Anomalous oriented attachment growth behavior on SnO2 nanocrystals." CHEMICAL COMMUNICATIONS 47, no. 11, 3117 - 3119.
  • Torres,E,A; Ramirez,A,J, 2011, "In situ scanning electron microscopy." SCIENCE AND TECHNOLOGY OF WELDING AND JOINING 16, no. 1, 68 - 78.
  • de Pauli,M; Malachias,A; Westfahl,H; Bettini,J; Ramirez,A; Huang,G,S; Mei,Y,F; Schmidt,O,G, 2011, "Study of roughness evolution and layer stacking faults in short-period atomic layer deposited HfO2/Al2O3 multilayers." JOURNAL OF APPLIED PHYSICS 109, no. 6, 063524 -
  • Stroppa,Daniel,G; Montoro,Luciano,A; Beltran,Armando; Conti,Tiago,G; da Silva,Rafael,O; Andres,Juan; Leite,Edson,R; Ramirez,Antonio,J, 2011, "Dopant Segregation Analysis on Sb:SnO2 Nanocrystals." CHEMISTRY-A EUROPEAN JOURNAL 17, no. 41, 11515 - 11519.
  • Stroppa,Daniel,G; Righetto,Ricardo,D; Montoro,Luciano,A; Ramirez,Antonio,J, 2011, "MEGACELL: A nanocrystal model construction software for HRTEM multislice simulation." ULTRAMICROSCOPY 111, no. 8, 1077 - 1082.
  • Longo,Valeria,M; Gracia,Lourdes; Stroppa,Daniel,G; Cavalcante,Laecio,S; Orlandi,Marcelo; Ramirez,Antonio,J; Leite,Edson,R; Andres,Juan; Beltran,Armando; Varela,Jose,A; Longo,Elson, 2011, "A Joint Experimental and Theoretical Study on the Nanomorphology of CaWO4 Crystals." JOURNAL OF PHYSICAL CHEMISTRY C 115, no. 41, 20113 - 20119.

2010

  • Montoro,Luciano,A; Medeiros-Ribeiro,Gilberto; Ramirez,Antonio,J, 2010, "Novel Approach for High-Resolution Elastic Behavior Assessment of Alloyed Strained Nanostructures." JOURNAL OF PHYSICAL CHEMISTRY C 114, no. 29, 12409 - 12415.
  • Afonso,Conrado,RM; Ferrandini,Peterson,L; Ramirez,Antonio,J; Caram,Rubens, 2010, "High resolution transmission electron microscopy study of the hardening mechanism through phase separation in a beta-Ti-35Nb-7Zr-5Ta alloy for implant applications." ACTA BIOMATERIALIA 6, no. 4, 1625 - 1629.
  • Sowards,J,W; Ramirez,A,J; Dickinson,D,W; LIPPOLD,J,C, 2010, "Characterization of Welding Fume from SMAW Electrodes - Part II." WELDING JOURNAL 89, no. 4, 82S - 90S.
  • Moura,A,P; Cavalcante,L,S; Sczancoski,J,C; Stroppa,D,G; Paris,E,C; Ramirez,A,J; Varela,J,A; Longo,E, 2010, "Structure and growth mechanism of CuO plates obtained by microwave-hydrothermal without surfactants." ADVANCED POWDER TECHNOLOGY 21, no. 2, 197 - 202.
  • Unfried,J,S; Paes,M,TP; Hermenegildo,T,FC; Bastian,F,L; Ramirez,A,J, 2010, "Study of microstructural evolution of friction taper plug welded joints of C-Mn steels." SCIENCE AND TECHNOLOGY OF WELDING AND JOINING 15, no. 6, 506 - 513.
  • Santos,T,FA; Hermenegildo,T,FC; Afonso,C,RM; Marinho,R,R; Paes,M,TP; Ramirez,A,J, 2010, "Fracture toughness of ISO 3183 X80M (API 5L X80) steel friction stir welds." ENGINEERING FRACTURE MECHANICS 77, no. 15, 2937 - 2945.
  • Suela,J; Ribeiro,I,RB; Ferreira,S,O; Malachias,A; Fontes,G,N; Montoro,L,A; Ramirez,A,J, 2010, "Evolution of crystalline domain size and epitaxial orientation of CdTe/Si(111) quantum dots." JOURNAL OF APPLIED PHYSICS 107, no. 6, 064305 -
  • Arantes,Tatiane,M; Mambrini,Giovanni,P; Stroppa,Daniel,G; Leite,Edson,R; Longo,Elson; Ramirez,Antonio,J; Camargo,Emerson,R, 2010, "Stable colloidal suspensions of nanostructured zirconium oxide synthesized by hydrothermal process." JOURNAL OF NANOPARTICLE RESEARCH 12, no. 8, 3105 - 3110.
  • Damaschio,Cleocir,Jose; Berengue,Olivia,M; Stroppa,Daniel,G; Simon,Ricardo,A; Ramirez,Antonio,J; Schreiner,Wido,Herwig; Chiquito,Adenilson,J; Leite,Edson,R, 2010, "Sn3O4 single crystal nanobelts grown by carbothermal reduction process." JOURNAL OF CRYSTAL GROWTH 312, no. 20, 2881 - 2886.
  • Souza,S,A; Manicardi,R,B; Ferrandini,P,L; Afonso,C,RM; Ramirez,A,J; Caram,R, 2010, "Effect of the addition of Ta on microstructure and properties of Ti-Nb alloys." JOURNAL OF ALLOYS AND COMPOUNDS 504, no. 2, 330 - 340.
  • Gonser,M,J; LIPPOLD,J,C; Dickinson,D,W; Sowards,J,W; Ramirez,A,J, 2010, "Characterization of Welding Fume Generated by High-Mn Consumables." WELDING JOURNAL 89, no. 2, S25 - S33.

2009

  • Ramirez,C,AO; Costa,A,M; Bettini,J; Ramirez,A,J; da Silva,M,HPrado; Rossi,A,M, 2009, "Structural Properties of Nanostructured Carbonate Apatites." BIOCERAMICS 21 396-398, 611 - 614.
  • Montoro,Luciano,A; Leite,Marina,S; Biggemann,Daniel; Peternella,Fellipe,G; Batenburg,K,Joost; Medeiros-Ribeiro,Gilberto; Ramirez,Antonio,J, 2009, "Revealing Quantitative 3D Chemical Arrangement on Ge-Si Nanostructures." JOURNAL OF PHYSICAL CHEMISTRY C 113, no. 21, 9018 - 9022.
  • Montoro,Luciano,A; Leite,Marina,S; Biggemann,Daniel; Peternella,Fellipe,G; Batenburg,K,Joost; Medeiros-Ribeiro,Gilberto; Ramirez,Antonio,J, 2009, "Chemical Nano-Tomography of Self-Assembled Ge-Si:Si(001) Islands From Quantitative High Resolution Transmission Electron Microscopy." ELECTRON CRYSTALLOGRAPHY FOR MATERIALS RESEARCH AND QUANTITATIVE CHARACTERIZATION OF NANOSTRUCTURED MATERIALS 1184, 131 - 138.
  • Silgado,Jimy,Unfried; Lopez,Edwar,Torres; Ramirez,Antonio,Jose; Giraldo Barrada,Jorge, 2009, "Evaluation of Susceptibility of Hydrogen Induced Cracking in Microalloyed Armor Steel Welds using a Geometry Modified Implant Test." SOLDAGEM & INSPECAO 14, no. 3, 207 - 214.
  • Stroppa,Daniel,G; Montoro,Luciano,A; Beltran,Armando; Conti,Tiago,G; da Silva,Rafael,O; Andres,Juan; Longo,Elson; Leite,Edson,R; Ramirez,Antonio,J, 2009, "Unveiling the Chemical and Morphological Features of Sb-SnO2 Nanocrystals by the Combined Use of High-Resolution Transmission Electron Microscopy and ab Initio Surface Energy Calculations." JOURNAL OF THE AMERICAN CHEMICAL SOCIETY 131, no. 40, 14544 - 14548.

2008

  • Orlandi,Marcelo,Ornaghi; Ramirez,Antonio,Jos; Leite,Edson,Roberto; Longo,Elson, 2008, "Morphological evolution of tin oxide nanobelts after phase transition." CRYSTAL GROWTH & DESIGN 8, no. 3, 1067 - 1072.
  • Sowards,J,W; Ramirez,A,J; LIPPOLD,J,C; Dickinson,D,W, 2008, "Characterization procedure for the analysis of arc welding fume." WELDING JOURNAL 87, no. 3, 76S - 83S.
  • Ramirez,A,J; Garzon,C,M, 2008, "Thermodynamic and Kinetic Approach to Ductility-Dip Cracking Resistance Improvement of Ni-base Alloy ERNiCrFe-7: Effect of Ti and Nb Additions." HOT CRACKING PHENOMENA IN WELDS II 1, 427 - 453.
  • Sowards,J,W; LIPPOLD,J,C; Dickinson,D,W; Ramirez,A,J, 2008, "Characterization of welding fume from SMAW electrodes - Part I." WELDING JOURNAL 87, no. 4, 106S - 112S.
  • Biggemann,Daniel; Prado da Silva,Marcelo,H; Rossi,Alexandre,M; Ramirez,Antonio,J, 2008, "High-resolution transmission electron microscopy study of nanostructured hydroxyapatite." MICROSCOPY AND MICROANALYSIS 14, no. 5, 433 - 438.
  • Oluwafemi,S,O; Revaprasadu,N; Ramirez,A,J, 2008, "A novel one-pot route for the synthesis of water-soluble cadmium selenide nanoparticles." JOURNAL OF CRYSTAL GROWTH 310, no. 13, 3230 - 3234.
  • Fiorentini,G,A; Leite,Marina,S; Pimentel,V,L; Montoro,L,A; Ramirez,A,J; Medeiros-Ribeiro,G, 2008, "Reactive epitaxy of metallic hafnium silicide nanocrystals." APPLIED PHYSICS LETTERS 93, no. 1, 013107 -

2007

  • Rossi,A,M; Prado da Silva,M,H; Ramirez,A,J; Biggemann,D; Caraballo,M,M; Mascarenhas,Y,P; Eon,J,G; Moure,G,T, 2007, "Structural properties of hydroxyapatite with particle size less than 10 nanometers.." BIOCERAMICS, VOL 19, PTS 1 AND 2 330-332, 255 - ?.
  • Afonso,C,RM; Aleixo,G,T; Ramirez,A,J; Caram,R, 2007, "Influence of cooling rate on microstructure of Ti-Nb alloy for orthopedic implants." MATERIALS SCIENCE & ENGINEERING C-BIOMIMETIC AND SUPRAMOLECULAR SYSTEMS 27, no. 4, 908 - 913.
  • Garzon,Carlos,Mario; Serna,Carlos,A; Brandi,Sargio,D; Ramirez,Antonio,J, 2007, "The relationship between atomic partitioning and corrosion resistance in the weld-heat affected zone microstructures of UNSS32304 duplex stainless steel." JOURNAL OF MATERIALS SCIENCE 42, no. 21, 9021 - 9029.

2006

  • Ramirez,Antonio,J; Sowards,Jeffrey,W; Lippold,John,C, 2006, "Improving the ductility-dip cracking resistance of Ni-base alloys." JOURNAL OF MATERIALS PROCESSING TECHNOLOGY 179, no. 1-3, 212 - 218.
  • Garzon,C,M; Ramirez,A,J, 2006, "Growth kinetics of secondary austenite in the welding microstructure of a UNSS32304 duplex stainless steel." ACTA MATERIALIA 54, no. 12, 3321 - 3331.

2005

  • Ramirez,A,J; Brandi,S,D, 2005, "Weldability approach to duplex stainless steels using multicomponent phase diagrams." PRICM 5: THE FIFTH PACIFIC RIM INTERNATIONAL CONFERENCE ON ADVANCED MATERIALS AND PROCESSING, PTS 1-5 475-479, 2765 - 2768.

2004

  • Collins,M,G; Ramirez,A,J; LIPPOLD,J,C, 2004, "An investigation of ductility-dip cracking in nickel-based weld metals - Part III." WELDING JOURNAL 83, no. 2, 39S - 49S.
  • Ramirez,A,J; Brandi,S,D, 2004, "Application of discrete distribution point heat source model to simulate multipass weld thermal cycles in medium thick plates." SCIENCE AND TECHNOLOGY OF WELDING AND JOINING 9, no. 1, 72 - 82.
  • Ramirez,A,J; Lippold,J,C, 2004, "High temperature behavior of Ni-base weld metal - Part II - Insight into the mechanism for ductility dip cracking." MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING 380, no. 1-2, 245 - 258.
  • Ramirez,A,J; Lippold,J,C, 2004, "High temperature behavior of Ni-base weld metal - Part I. Ductility and microstructural characterization." MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING 380, no. 1-2, 259 - 271.
  • Ramirez,A,J; Brandi,S,D; LIPPOLD,J,C, 2004, "Secondary austenite and chromium nitride precipitation in simulated heat affected zones of duplex stainless steels." SCIENCE AND TECHNOLOGY OF WELDING AND JOINING 9, no. 4, 301 - 313.

2003

  • Ramirez,A,J; Juhas,M,C, 2003, "Microstructural evolution in Ti-6Al-4V friction stir welds." THERMEC'2003, PTS 1-5 426-4, 2999 - 3004.
  • Ramirez,A,J; LIPPOLD,J,C; Brandi,S,D, 2003, "The relationship between chromium nitride and secondary austenite precipitation in duplex stainless steels." METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE 34A, no. 8, 1575 - 1597.
  • Collins,M,G; Ramirez,A,J; LIPPOLD,J,C, 2003, "An investigation of ductility dip cracking in nickel-based weld metals - Part II." WELDING JOURNAL 82, no. 12, 348S - 354S.
  • Serna,C,P; Ramirez,A,J; Alonso-Falleiros,N, 2003, "Pitting corrosion resistance of duplex stainless steels multipass welds." TRENDS IN WELDING RESEARCH, PROCEEDINGS 1, 793 - 798.

Papers in Proceedings

2008

  • LIPPOLD,J,C; Sowards,J,W; Murray,G,M; Alexandrov,B,T; Ramirez,A,J "Weld Solidification Cracking in Solid-Solution Strengthened Ni-Base Filler Metals." JOURNAL: "HOT CRACKING PHENOMENA IN WELDS II." in 2nd International Workshop on Hot Cracking Phenomena in Welds. BERLIN, (1 2008). 147 - 170.

2006

  • Ramirez,Antonio,J; Sowards,Jeffrey,W; Lippold,John,C "Improving the ductility-dip cracking resistance of Ni-base alloys." JOURNAL: "JOURNAL OF MATERIALS PROCESSING TECHNOLOGY." in 3rd Brazilian Congress of Manufacturing Engineering. LAUSANNE, (10 2006). 212 - 218.

2005

  • Ramirez,A,J; LIPPOLD,J,C "New insight into the mechanism of ductility-dip cracking in Ni-base weld metals." JOURNAL: "HOT CRACKING PHENOMENA IN WELDS." in International Workshop on Hot Cracking Phenomena in Welds. BERLIN, (1 2005). 19 - 41.

2003

  • Ramirez,A,J; Juhas,M,C "Microstructural evolution in Ti-6Al-4V friction stir welds." JOURNAL: "THERMEC'2003, PTS 1-5." in 4th International Conference on Processing and Manufacturing of Advanced Materials. STAFA-ZURICH, (1 2003). 2999 - 3004.