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Chemical Engineering Engineer

Location:
Buffalo, NY
Salary:
105000
Posted:
March 03, 2019

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Resume:

RAVI SHANKER RAJAMURE

* ********* **, *** # *, Buffalo, NY, 14221.

Cell: 716-***-****, Email: ac8nw8@r.postjobfree.com

(Work Authorization: Green Card/Permanent Resident)

PROFESSIONAL SUMMARY

* **ars of experience in laser based additive manufacturing/laser surface cladding/direct metal laser deposition using various ferrous and non-ferrous alloys to improve hardness, mechanical properties and other surface properties (corrosion, erosion, wear, & friction).

6+ years of experience in physical and mechanical metallurgy of ferrous and non-ferrous alloys.

6+ years of experience in the knowledge of the methodology, tests and equipment used in the microstructural and mechanical property characterization of metallic materials for various applications.

6+ years of experience in powder metallurgy, alloy processing, microstructure and property relationships.

4+ years of experience in corrosion and electrochemistry of aluminum and its alloys.

2+ years of experience in designing the general procedure for heat treatment (Quenching, Tempering, Annealing, Normalizing, Carburizing, Carbonitriding, Nitriding, Vacuum solution annealing, Precipitation hardening and Stress relieving) of ferrous and non-ferrous in accordance with customer specification requirement.

General knowledge in additive manufacturing of metals using laser powder bed fusion (LPBF) or electron beam melting (EBM).

Education:

Ph.D. Materials Science & Engineering Dec 2014

-University of North Texas, Denton, Texas. GPA: 3.90/4

-Dissertation Title: Laser surface alloying/cladding of transition metals (Mo, W, Ta, and Nb) on aluminum for enhanced localized corrosion resistance: Experimental & Theoretical approach.

Master of Science in Chemical Engineering Dec 2010

-Cleveland State University, Cleveland, Ohio. GPA: 3.49/4

-Thesis Title: Directional solidification of aluminum - 7 Wt % silicon alloy

Bachelor of Engineering in Chemical Engineering Aug 2006

-Rural Engineering College, Karnataka, India (Visvesvaraya Technological University)

Technical Skills Electro-chemical analysis

Laser surface engineering 3D CAD: Solid works/Autodesk

Rigaku Ultima III X-ray diffractometer (XRD) OriginPro,

Scanning electron microscopy (SEM) Optical microscopy

Macro/Micro hardness & tensile testing Pin-on-disk-tribometer

Image J, Sigma Scan Pro, MS Office Optical emission spectroscopy

First principle calculations Thermo-Calc, Pandat

Work Experience:

Currently working as Additive application engineer at Buffalo Mfg. works (Operated by EWI) at Buffalo, NY, 14203. April 2018 to present.

Experience in additive manufacturing using laser directed energy deposition (LDED) and binder jet printing using various ferrous and non-ferrous alloys.

Evaluated the microstructural analysis and corrosion resistance after 3D-metal printing of ferrous alloys using laser powder bed fusion (LPBF) or electron beam melting (EBM) and binder jet printing.

General knowledge in additive manufacturing of metals using laser powder bed fusion (LPBF) or electron beam melting (EBM).

Proficient in 3D CAD modelling using Solid Works or Autodesk Inventor.

Experience in powder property characterization (Flowability, Apparent & Tap density, Hausner Ratio, microstructure, porosity, phase analysis, particle size distribution and oxygen/Nitrogen/Hydrogen elemental Analysis).

Experience in additive manufacturing of functional/compositional graded material (New alloy development) using stainless steel and nickel-based alloys: Experimental methodology and computational modelling (ThermoCalc/CALPHAD Approach)

Managed materials development projects and ensured projects are delivered on time to a high-quality standard.

Laser Process Engineer at IPG Photonics Corp, Marlborough/Oxford, Massachusetts, Jan 2017-March 2018.

Experience in laser based additive manufacturing/laser surface cladding/direct metal laser deposition using various metallic powders (ferrous, nickel, cobalt based powders) on various ferrous and non-ferrous alloys to improve hardness, mechanical properties and other surface properties (corrosion, erosion, wear, & friction).

Studied the phase and microstructural evolution, hardness distribution, heat affected zone area and dilution of the clad layer into the substrate after laser cladding/direct metal laser deposition.

High power fiber laser welding of ferrous and non-ferrous alloys. Characterized the weld quality in terms of weld width, penetration depth and metallurgical quality (microstructure, micro-hardness, heat-affected zone, porosity, cracking, oxidation, etc).

Laser cutting of steel alloys using pulse and QCW laser. Studied the quality of the laser cut edge in terms of perpendicularity of the cut edge, dross, roughness, small kerf-width, slag-deposits/spatter, etc.

Laser marking/engraving on ferrous and non-ferrous alloys using Pulse/Conitnous/QCW lasers. Evaluated the quality of the laser marking/engraving in terms of the contrast, homogeneity, contour accuracy, position accuracy, sharpness.

Laser surface ablation of paints/coatings and oxides from metallic/polymeric materials using ultra-short pulse lasers (nano/pico/femto).

Fundamental knowledge of process optimization using laser parameters such as power, pulse energy, and spot size, scanning speed.

Experience in robot programming.

Physical metallurgist at Thermal Specialties Heat Treating, Tulsa, Oklahoma, USA. March 2015-Jan 2017.

Designed the general procedure for heat treatment procedure (Quenching, Tempering, Annealing, Normalizing, Carburizing, Carbonitriding, Nitriding, Vacuum solution annealing, Precipitation hardening and Stress relieving) for ferrous and non-ferrous in accordance with customer specification requirement.

Analyzed the microstructure of Ferrous alloys (4130, 8620, 4340, 9310, 12L14, 41L40, A2, D2, H13, S7, O1, 416ss, 420, A36, 1018, 1026, 17-4PH, 15-5PH, 52100, 1020, 1035, 1117, A694, A148, 52100, 12L14) after heat treatment.

Evaluated the hardness, effective case depth and core hardness after carburizing, nitriding and carbonitriding of various steel alloys.

Evaluated and cross verify the heat treatments (Quenching, Tempering, and Case hardening) cycle procedure for steel alloys in accordance with mechanical property requirement (Hardness, Tensile strength, yield strength and fracture toughness).

Studied/analyzed the microstructure after heat treatment of ferrous alloys in terms of retained austenite, carbide network, decarburization, grain size, microcracks, undissolved or blocky ferrite, austenite, cementite (Fe3c), pearlite, bainite, spherodite, martensite, primary metal carbides/precipitates.

Work Experience:

Graduate Research Assistant: Material Science& Engineering, UNT-Denton, TX (January 2011-December 2014)

Laser surface alloying/cladding of various metallic and ceramic powders on ferrous and non-ferrous alloys to improve the surface properties (corrosion, wear & friction).

Studied the phase and microstructural evolution after laser alloying/cladding.

Performed the various electrochemical analytical techniques (Open circuit potential, cyclic potentiodynamic polarization and electrochemical impedance spectroscopy) on the laser alloyed/cladded surface to evaluate the corrosion resistance on ferrous and non-ferrous alloys.

Characterized the pitting corrosion morphology on the laser cladded samples using SEM.

Performed the computational modelling using CALPHAD/Pandat and First Principle Calculations to evaluate the stability of intermetallics (Al-Mo, Al-Ta, Al-Nb, and Al-W) evolved during laser surface alloying/cladding.

Graduate Research Assistant: Department of Chemical & Biomedical Engineering, Cleveland State University, Cleveland, Ohio, 44114. (January 2008 - December 2010)

Directional Solidification of Aluminum - 7 Wt % Silicon Alloy. (August 2008-December 2010)

Analyzed the primary dendrite spacing, trunk mean diameter with respect to the fraction of distance solidified corresponding to the growth speed during the directional solidification.

Studied the influence of growth speed on cellular /dendritic array morphology and dependence of primary dendrite spacing with respect to the thermal gradient.

Evaluated the primary, secondary, tertiary dendrite arm spacing, dendrite tip radius and compare with the various theoretical models.

Dependence of liquid composition at dendrite tip and solute content in the interdendritic two phase eutectic was studied with respect to the cooling rate during directional solidification.

Micro structural transition behavior (dendrite, cell, and plane) has been studied.

Environmental barrier coatings for Silicon Based Ceramics. (Jan 2008 - July 2008)

Worked on mullite/rare earth silicates environmental barrier coatings for silicon-based (SiC, Si3N4) ceramics.

Optimized environmental barrier coating to protect silicon-based ceramics from oxidation by varying different

synthesis parameters.

Dip-coating of mullite-based slurry onto silicon carbide/nitride.

Evaluated thermal resistance of the developed barrier coating using high temperature cycling techniques.

Characterized the coating at substrate/coating interface using electron microscopy.

Professional Publications:

Ravi shanker Rajamure, Alex Kitt, Mark Barfoot, Standard Related to Metals in Additive Manufacturing, Appliance Design, Feb 15th, 2019.

Ravi Shanker Rajamure, Hitesh D. Vora, S.G. Srinivasan, Narendra B. Dahotre, Laser surface alloying of molybdenum on aluminum for enhanced wear resistance, Surface and Coatings Technology, November 2014,258, 337-342.

Ravi Shanker Rajamure, Hitesh D Vora, S. G. Srinivasan, Narendra B. Dahotre*, Laser Alloyed Al - W Coatings on Aluminum for Enhanced Corrosion Resistance, Applied surface Science, February 2015, Vol 328, 205-214.

Dunja Ravnikar, Ravi Shanker Rajamure, Uroš Trdan, Narendra B Dahotre, Janez Grum, Electrochemical and DFT studies of laser-alloyed TiB2/TiC/Al coatings on aluminium alloy, Corrosion Science, 136, 2018, 18-27.

Sayeed Mohammed, Ravi Shanker Rajamure, Zhe Zhang, Prabu Balu, Narendra B Dahotre, Radovan Kovacevic, Tailoring corrosion resistance of laser-cladded Ni/WC surface by adding rare earth elements, The International Journal of Advanced Manufacturing Technology, August 2018, Volume 97, Issue 9–12, pp 4043–4054

Hitesh D. Vora, Ravi Shanker Rajamure, Sanket N. Dahotre, Raj Banerjee, Narendra B. Dahotre, Integrated experimental and theoretical approach for corrosion and wear evaluation of laser Surface Nitrided, Ti-6Al-4V Biomaterial in Physiological Solution, Journal of the Mechanical Behavior of Biomedical Materials, 37, 2014, 153-164.

Hitesh D. Vora, Ravi Shanker Rajamure, S. Santhanakrishnan, S.G. Srinivasan, Narendra B. Dahotre "Dilution of Molybdenum on Aluminum during Laser Surface Alloying." Journal of Alloys and Compounds, Volume 570, 5 September 2013, Pages 133-143.

Hitesh D. Vora, Ravi Shanker Rajamure, S. Santhanakrishnan, S.G. Srinivasan, Narendra B. Dahotre “Design and optimization of microstructure for improved corrosion resistance in laser surface alloyed aluminum with molybdenum." International Journal of Precision Engineering and Manufacturing, August 15, 2013

Hitesh D Vora, Ravi Shanker Rajamure, Anurag Roy, SG Srinivasan, G Sundararajan, Rajarshi Banerjee, Narendra B Dahotre, Laser Assisted Additively Manufactured Transition Metal Coating on Aluminum, Journal of Material Science, Springer, 1-11, 2016.

Victor Ageh, Ravi Shanker Rajamure, Y.H. Ho, and Thomas W. Scharf, “Nanocrystalline Zinc Titanate Coatings for Corrosion Protection,” Nanomaterials and Energy (2014).

Sanket N. Dahotre, Hitesh D. Vora, Ravi Shanker Rajamure, Lu Huang, Raj Banerjee, Wei He, Narendra B. Dahotre, Laser Induced Nitrogen Enhanced Titanium Surfaces for Improved Osseo-Integration, Annals of Biomedical Engineering, January 2014, Volume 42(1), 50-61.

Shravana Katakam, Vivek Kumar, S. Santhanakrishnan, Ravi Shanker Rajamure, P. Samimi, Narendra B Dahotre, Laser assisted Fe-based bulk amorphous coating: Thermal effects and corrosion, Journal of Alloys and Compounds, Volume 604, 2014, Pages 266-272.

Tso-Chang Wu, Yee-Hsien Ho, Sameehan S. Joshi, Ravi S. Rajamure, Narendra B. Dahotre, Microstructure and corrosion behavior of laser surface-treated AZ31B Mg bio-implant material, Lasers in Medical Science, May 2017, Volume 32, Issue 4, pp 797–803.

Surendra N. Tewari, Ravi S. Rajamure*, Richard N. Grugel, Robert E. Erdman, David R. Poirier, " Directionally Solidified Aluminum - 7 wt % Silicon Alloys: Comparison of Earth and International Space Station Processed Samples, Nov 28, 2012, SPACE SCIENCES, SPACE PROCESSING, NASA Marshall Space Flight Center; Huntsville, AL, United States.

Surendra N. Tewari, Ravi S. Rajamure*, Richard N .Grugel, Robert E. Erdman, David R. Poirier, “Primary Primary Dendrite Dendrite Array: Observations Observations from Ground based and Space Station Processed Samples, Nov 19, 2012, SPACE PROCESSING, NASA Marshall Space Flight Center; Huntsville, AL, United States.

Surendra N. Tewari, Ravi S. Rajamure*, Richard N .Grugel, Robert E. Erdman, David R. Poirier, “Morphology of Primary-Dendrite Array: Observations from Ground-Based and Space Station Processed Samples” Oct 07, 2012, SPACE PROCESSING, NASA Marshall Space Flight Center; Huntsville, AL, United States.

International Conferences:

Ravi shanker Rajamure, Development of Functionally Graded Materials with Blown Powder Laser Directed Energy Deposition-workflow development for repair applications, Additive Manufacturing Consortium, winter meeting 2019, Denver, Colorado, USA.

Surendra N Tewari, Ravi Shanker Rajamure, Richard N Grugel, Robert E Erdmann, David R Poirier, Primary Dendrite Array Morphology: Observations from Ground-Based and Space Station Processed Samples, Materials Science and Technology Conference and Exhibition 2012, Pittsburgh, Pennsylvania, United States.

Ravi Shanker Rajamure, Hitesh D. Vora, G. Srinivasan, Narendra B Dahotre, Laser Surface alloying of Mo on Al 1100 for Enhanced Corrosion Resistance: Theory & Experiments, TMS, 142 Annual Meeting & Exhibition 2013, San-Antonio, Texas, USA, United States.

Ravi Shanker Rajamure, Hitesh D Vora, S.G. Srinivasan, Narendra B Dahotre, Prediction of intermetallics evolved during laser surface alloying of molybdenum on aluminum: Experimental & Theoretical approach, TMS, 144 Annual Meeting & Exhibition 2014, San-Diego, California, United States.

Ravi Shanker Rajamure, S.G. Srinivasan, Narendra B Dahotre, Prediction of Intermetallics and their Corrosion Resistance evolved during Laser Surface Alloying of Niobium on Aluminum: Experimental & Theoretical Approach", MS&T 2014 - Materials Science & Technology conference, October 12-16, 2014, David L. Lawrence Convention Center, Pittsburgh, Pennsylvania, United states.



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