Providing scientific leadership on the topic of "Microscopic origin of mass transport under shear deformation" for a group of 12 staff scientists, 4 postdoctoral researchers, 1 post masters and 3 graduate student interns working on Thrust 2 of solid phase processing initiative. SPPSi is lead by Cynthia Powell and Suveen Mathaudhu (SPPSi Chief scientist).Thrust 2 focuses on unraveling microscopic origins of mass transfer during solid phase processing of materials. We are designing and deploying novel in situ tools such as high speed rotational diamond anvil cell at synchrotron beamlines and new shear deformation stages for state-of-the-art advanced microstructural characterization capabilities in PNNL, all dedicated to analyze shear deformation of materials with very high spatial and temporal resolution. In Thrust 2, we are also investigating the atomic scale changes in materials after shear deformation using multimodal microstructural characterization with aberration corrected transmission electron microscopy, atom probe tomography and other capabilities, to reveal mechanistic insights on shear induced mass transfer and interfacing with Thrust 1 focused on developing new solid phase processing methods (lead by Glenn Grant) and thrust 3 on computational simulations (lead by Peter Sushko).

Material scientist leading a number of research projects as principle investigator. Thrust lead for solid phase processing science initiative thrust 2. PI of DOE office of vehicle technology propulsion materials program. PI of a number of NNSA tritium science projects, PNNL open call LDRD. Focused on understanding material processing-microstructure-property relationships and material degradation under extreme environments, primarily using advanced multimodal chemical imaging including electron microscopy, atom probe tomography, synchrotron based X-ray diffraction/absorption and neutron diffraction.

Material scientist interested in microstructure-property relationship of materials with expertise on using advanced microstructural characterization in conjunction with computational methods and material testing. Involved with multimodal chemical imaging by combining aberration corrected TEM/STEM, Scanning transmission Xray microscopy (XANES/STXM) at Berkley Advanced Light Source with Atom probe tomography and Helium ion microscopy. Working on variety of materials including metals and alloys for aerospace and transportation, nuclear fuel/structural materials, next generation Li-ion battery materials, Catalyst materials.

• Provided both co-authorship and assistance to users in developing research ideas for the submission of user proposals at EMSL. • Assisted outside and internal users by performing FIB based APT sample preparation, APT data acquisition, and data analysis. • Continually monitor trends in research to aid in seeking potential outside APT users. Including regular attendance and contribution to conferences related to APT analysis. • Co-organized Atom Probe Tomography Workshop hosted at PNNL (June 19-22, 2012) with an aim to strategically bring together leaders in the APT and TEM community to discuss the challenges and feasibility of combining the techniques of APT and TEM into a single tool. The workshop was held under the Surface Analysis ’12 annual topical conference sponsored by the Applied Surface Science Division of AVS. • Established independent ongoing research collaborations with Cameca and University of Rouen, France on developing FEM based simulation methods for improving the atom probe tomography reconstruction algorithm for heterogeneous materials.• Assisted in review of EMSL rapid access user proposals and NSF proposals.• Wrote Laboratory Directed Research and Development (LDRD) white paper and full proposals as well as contributed to APT related section in external proposals submitted to DOE and EERE from PNNL. • Assisted in writing workshop report for material science needs for compact light source development project from PNNL. • Organized a symposium on “Irradiation response of Interfaces” (IBM05 session) in CAARI 2012 conference at Fort Worth, Texas, Aug 5-9, 2012.• Chaired atom probe tomography session and workshop in EMSL 2011 User Meeting.• Served on “the invited panel of experts” for a question answer session during CAMCOR workshop, University of Oregon on “Determining the composition and structure of small volumes” To be held on Sept 2012. • Reviewed manuscripts for IOP Nanotechnology and Journal of Physical Chemistry C.

Joint appointee Research Faculty at Department of Metallurgical and Materials Engineering in Colorado School of Mines.

• Detailed microstructural characterization of various heat treated industrially relevant titanium alloys and metallic thin films using SEM, EDS, EBSD, TEM, XRD and APT.• Focused Ion beam (FIB) lift-out for preparation of site-specific TEM and APT samples of thin films and titanium alloys. • Conducted voltage and laser-assisted APT analysis of amorphous, metallic thin films and metallic alloys. • Laser deposition of alloys using Laser Engineered Net Shaping (LENS) technique.• Thin film deposition and heat treatments using Kurt J Lesker, Physical Vapor Deposition system (PVD).• Trained and supervised several students and personnel on various instruments and laboratory procedures, such as APT, Physical Vapor deposition (PVD), Laser Engineered Net Shaping, FIB, TEM and SEM.• In situ Synchrotron X-ray diffraction at Beamline 11IDC of Advanced Photon Source, Argonne National Lab to study the kinetics of alpha phase precipitation in beta matrix of Ti5553 and model Ti-Mo-Al alloys, devitrification of Cu-Nb films.• Provided consultation to Nucon Steel to solve the issue of cracking of galvanized steel coils on roll forming. Letter of appreciation from Nucon steel can be provided. (2008)• Lead the organization of ASM Materials Camp as President of Material Advantage Chapter at UNT (2010).• Founded Materials Advantage Chapter (TMS, ASM, ACERS, AIST) in University of North Texas (2008) • Lead outreach activities and educational events of Department of Material Science and engineering, UNT for high school students of DFW metropolis region. (2008 to present)• Taught courses in science and mathematics to high school students for TAKS preparation at Stickler Middle school, Denton, TX. (2010)

• Characterization of meta-stable Ag 4H and 3C phases in films of under-potential electrodeposited Ag using TEM, SEM and EDS.

• Characterization of steel samples for investigation of quality problems using SEM, EDS and optical microscopy.• Process auditing, ISO-TS and Six Sigma documentation in steel melting plant.• Quality control of slab conditioning process for minimization of edge related problems in steel coils.• Task force and Quality Circle member for surface quality improvement and transverse crack reduction during continuous casting of various steel grades.

• Heat treatment and characterization of Zr-Nb-Fe-Sn alloys using Optical microscopy, XRD and TEM• Transmission electron microscopy (TEM) sample preparation using twin jet electro polishing.