Jie Geng

**** ******* ***, **** *, Ames, IA *****, USA; Cell: 401-***-****; E-mail:

acdtsa@r.postjobfree.com

Visa status: Green card holder

Education

PhD in Materials Science and Metallurgy, University of Surrey, U.K. June

2006

M.Eng. in Materials Science, Shanghai Institute of Ceramics, Chinese July

Academy of Sciences 2002

B.Eng. in Materials Science & Engineering, Huazhong University of June

Science & Technology, China 1999

Technical Skills

Extensive hands-on experiences on materials synthesis, characterization

and experiment design, especially on processing-structure-property

relationships in aluminum and magnesium alloys.

. Materials synthesis and processing: solid state reaction

(ceramics), plasma arc melting, vacuum induction casting,

extrusion, rolling, sintering, heat treatment, single crystal

growth by Bridgeman method.

. Structural and compositional characterization: X-ray diffraction

(XRD), scanning and transmission electron microscopes (SEM and

TEM), HR-TEM, EDX, EBSD, FIB, AFM, optical microscopy, DSC, TG-DTA,

hardness testing, mechanical testing, failure analysis,

fractography.

Experiences

Research Associate, Jan. 2014 - Present

Ames Laboratory of US DOE, Ames, IA, USA

. Nanotwinned Materials for Energy Technologies: to examine the

underlying mechanisms of plasticity in nanotwinned (nt-) samples

targeted for high strength coupled with improved thermal stability.

> The deposition of nt-Cu/Ag thin films by sputter deposition

and mechanical testing.

> The characterization of nanotwinned materials by using XRD,

(in-situ)-TEM, STEM, and (t)-EBSD.

. Rapid assessment methodologies: to efficiently explore the optimum

compositions for various material systems and establish useful

material information (such as ternary phase diagrams), involving 3D

printing, XRD, DSC, SEM and TEM.

Postdoctoral Research Associate, Jan. 2011 - Dec. 2013

School of Engineering, Brown University, Providence, RI, USA

. Aluminum alloys design and characterization (texture,

precipitation, dislocation).

. Investigation on deformation mechanism (dislocation and deformation

twinning) along different directions in magnesium single crystals

by using TEM, SEM and FIB, providing fundamental insights to

improve the room temperature ductility of magnesium and its alloys.

. Hundreds of hours' operation time on FEI Helios DualBeam FIB/SEM,

FEI CM20 and JEOL 2100 TEMs.

Research Fellow, May 2007 - Dec. 2010

ARC Centre of Excellence for Design in Light Metals, Monash University,

Melbourne, Australia

. Developed a novel Mg-Zn-Co alloy system with an enhanced age-

hardening response compared to other Mg-Zn based alloys, resulting

in improved strength and lower cost.

. Improved the compressive/tensile yield strength ratio in magnesium

wrought alloys to near 1 (0.3-0.4 for most of commercial Mg wrought

alloys) by texture modification and precipitation.

. Characterization of texture evolution in rare-earth containing

magnesium alloys by EBSD.

. Characterization of the microstructure of casting and wrought

magnesium alloys before and after deformation, especially on the

phase identification and the interaction of twins and particles in

precipitation-hardenable alloys by SEM and TEM.

Graduate Research Assistant, University of Surrey, Oct. 2002 - Jul.

2006

. Designed and prepared multi-component Nb-18Si-5Cr-5Al base in-situ

composites, which are developed for high temperature applications

as alternative materials to Ni-base superalloys.

. Characterization of the microstructure of the composites by XRD,

SEM and TEM.

. Evaluated the effects of alloy chemistry on microstructure, phase

transformation, phase selection, phase stability and oxidation

behaviour of the Nbss/Nb5Si3 base composites.

. Improved the oxidation resistance of the Nbss/Nb5Si3 base

composites by addition of Sn.

Graduate Research Assistant, Shanghai Institute of Ceramics, CAS, Sep.

1999 - Jul. 2002

. Proposed a novel microwave heating route to synthesize SrAl2O4:

Eu2+, Dy3+ phosphors. This process is more economical than

traditional high temperature solid-state reaction process, showing

wonderful potentials in both industry and laboratory.

. Investigated the properties and luminescent mechanism of alkaline

earth aluminates phosphors co-doped by Eu2O3 and Dy2O3.

Book

. Development of niobium silicide based in situ composites: Next

generation materials for high temperature applications, 2010, LAP

Lambert Academic Publishing, Germany (ISBN 978-3-8383-3085-3).

Selected Publications (http://www.researcherid.com/rid/B-8899-2009)

1. Incipient plasticity and deformation mechanisms in single-crystal

Mg during spherical nanoindentation. Acta Materialia, 2013, 61(8):

2953-2965.

2. Phase equilibria and transformations in ternary Mg-rich Mg-Y-Zn

alloys. Acta Materialia, 2012, 60(17): 5948-5962.

3. [0001] compression response at room temperature of single crystal

magnesium. Scripta Materialia, 2012, 67(7-8): 700-703.

4. Effect of plate-shaped particle distributions on the deformation

behaviour of magnesium alloy AZ91 in tension and compression. Acta

Materialia, 2012, 60(1): 218-228.

5. Processing and properties of Mg-6Gd-1Zn-0.6Zr: Part 2 - Mechanical

properties and particle twin interactions. Mater. Sci. Eng. A,

2011, 528(10-11): 3659-3665.

6. Enhanced age-hardening response of Mg-Zn alloys via Co additions.

Scripta Materialia, 2011, 64(6): 506-509.

7. Study of three-phase equilibrium in the Nb-rich corner of Nb-Si-Cr

system. Intermetallics, 2006, 14(7), 832-837.

8. Oxidation of Nb-Si-Cr-Al in situ composites with Mo, Ti and Hf

additions. Mater. Sci. Eng. A, 2006, 441(1-2), 26-38.

9. Synthesis of long afterglow SrAl2O4: Eu2+, Dy3+ phosphors through

microwave route. Journal of Materials Synthesis and Processing,

2002, 10(5), 245-248.

Activities

. Committee member of the Journal of Materials Engineering and

Performance.

. Committee member of TMS Materials and Society.

. Reviewer for Materials Chemistry & Physics, Intermetallics,

Materials Characterization, Materials Letter, Metallurgical &

Materials Transactions A, and Materials Science & Engineering A.

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