Mechanical Engineering

Wei Guo

*** ******* **** **, *********, TN, *****

865-***-**** *******@*****.***

SUMMARY

Materials science PHD seeking a metallurgist/materials science position involving: materials design, testing,

processing, and simulation, heat treatment, microstructure characterization, failure analysis, physical metallurgy.

EDUCATION

University of Tennessee, Knoxville Knoxville, TN

Ph.D., Materials Science and Engineering May, 2015

Beijing Institute of Technology Beijing, China

B.S., Materials Science and Engineering June 2006

QUALIFICATIONS

Strong expertise in design and processing of steels, W alloys, and metallic glasses focusing on the relationships

of processing, microstructure, and mechanical properties of materials through experiments and simulations.

5+ years' hands-on experience in alloy design, casting, processing, welding, heat treatment and CVD.

Extensive hands-on experience with mechanical tests of tension, compression, fatigue, and creep using MTS at

various temperatures following ASTM standards. Familiar with data acquisition and strain gauging.

Proficient with microstructure, texture, and thermodynamic characterizations and failure analysis of structural

materials through techniques such as: TEM, SEM with EDS, EBSD, XRD, high energy synchrotron X-ray

diffraction, neutron scattering, DSC and DTA.

4+ years' experience in computer simulations, programming with environments of C, C++, Matlab. Familiar

with finite element analysis using ABAQUS. Data processing and modeling using regression and hypothesis

tests. Engineering design with autoCAD, Solidworks.

Effective team player and excellent skills of communication, presentation, and technical writing for NSF and

DOE. Strong problem identification and solving abilities.

RESEARCH PROJECT EXPERIENCE

Design and development of multicomponent alloys and bulk metallic glasses (Aug. 2009 - now)

Fabricated multicomponent alloys ZrNbHf, FeCoCrNiAl and metallic glasses ZrCuAl using arc-melting and

drop casting. Performed heat treatment, processing, microstructure characterization and mechanical testing of

the alloys. Demonstrated, for the first time, the local lattice distortion due to the atomic size mismatch from the

pair distribution function (PDF) analysis in high-entropy alloys using synchrotron X-ray and neutron scattering

coupled with Rietveld refinement.

Unveiled the local structure changes of bulk metallic glasses due to fatigue and creep loadings with PDF

technique, in-situ and ex-situ synchrotron XRD, and DSC. Characterized the failure mechanism of bulk

metallic glasses using SEM, OM.

Quasi-static and dynamic mechanical properties of steel, tungsten and alloys (Sep. 2006 - Jun. 2009)

Characterized the microstructure evolution and failure analysis of steel, W and W heavy alloys under severe

deformation using TEM, SEM, XRD, high speed X-ray radiography to understand the plastic flow, grain

refinement, and dynamic recrystallization mechanisms under impact loading of stress waves.

Conducted mechanical testing of brittle pure W and W heavy alloys at various high strain rates and

temperatures using shock and impact loading methods and quasi-static compression.

Performed powder metallurgy, heat treatment, hot/cold work, machining, processing, and quality control of

tungsten heavy alloys.

Designed a CVD furnace for fabricating large W shaped samples. Optimizing the CVD furnace through finite

element analysis of temperature field. Fabricated and processed W shaped samples.

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Wei Guo

511 Sutters Mill Ln, Knoxville, TN, 37909

865-***-**** *******@*****.***

Atomic level stress in solid state amorphization of binary alloys (Jan. 2012 - Dec. 2013)

Studied the solid state amorphization in the binary alloys via molecular dynamics simulations. Applied the

atomic level stress to quantitatively understand the amorphization process and the local structure change.

Proposed a quantitative universal criteria in solid state amorphization with atomic level stress theory parallel

with the famous Lindeman melting criteria.

Molecular dynamics simulation of radiation damage in multicomponent alloys (Jan. 2014 -present)

Simulated the radiation damage and glass transitions in multicomponent alloys under varying lattice strain

using scaled pair potentials according to the atomic sizes.

Demonstrated the distinction in the cascading, radiation damage, phase stability and recrystallization behaviors

between multicomponent alloys and bcc iron.

Developed parallelized multiscale molecular dynamics simulation and data analysis codes (15,000+ lines) for

the study of irradiation, phase transition, recrystallization, interface, and mechanical properties of metals.

SELECTED PUBLICATIONS AND PRESENTATIONS

1. W. Guo, W. Dmowski, J.Y. Noh, et al, Local atomic structure of a high-entropy alloy: an X-ray and neutron

scattering study, Metal. Mater. Trans. A, 44, 1994-1997, 2013.

2. W. Guo, T. Iwashita, T. Egami, Universal local strain in solid state amorphization: the atomic size effect in

binary alloys, Acta Materialia, 68, 229-237, 2014.

3. T. Egami, W. Guo, P. Rack and T. Nagase, Irradiation resistance of multi-component alloys, Metal. Mater.

Trans. A, 45, 180-183, 2014.

4. W. Guo, S. Li, F.C. Wang, et al, Dynamic recrystallization of tungsten in a shaped charge liner, Scripta

Materialia, 60, 329-332, 2009.

5. W. Guo, H.C. Sun and S.K. Li, Dynamic deformation and fracture of chemical vapor deposition polycrystalline

tungsten, Proceedings of 7thInternational Conference on Shock & Impact Loads on Structures, Beijing, China,

Oct. 2007.

6. Liu Jinxu, Li Shukui, Guo Wei, Zheng Haiyun, Ni Fang, Sun Changqing, Susceptibility to Adiabatic Shear

Band of Tungsten Heavy Alloy Fabricated through Hot-Hydrostatic Extrusion and Cold Torsion, Rare Metal

Materials and Engineering, 37, 1360-1363, 2008.

7. H.C. Sun, S.K. Li, Y.X. Hou, X.D. Lu, W. Guo, EBSD study of CVD tungsten grain orientation and grain

boundary, Chinese Journal of Stereology and Image Analysis, Vol.12, No.4, 2007.

8. The atomic structure changes of a metallic glass under creep and fatigue loadings, TMS Annual Meeting,

Orlando, FL, March, 2012.

9. Pair distribution function of a high-entropy alloy: An X-ray and neutron scattering study, TMS Annual Meeting,

San Diego, CA, March, 2011.

10. Structural changes in BMG after mechanical fatigue and pre-loading, TMS Annual Meeting, San Diego, CA,

March, 2011.

REFERENCE

Takeshi Egami, advisor *****@***.*** 865-***-****

Distinguished Professor, Department of Materials Sci. Eng./Physics, University of Tennessee, Knoxville

Distinguished Scientist, Materials Sci. Tech. Division, Oak Ridge National Laboratory.

Peter K. Liaw, co-advisor *****@***.*** 865-***-****

Ivan Professor, Department of Materials Sci. Eng./Physics, University of Tennessee, Knoxville

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