Mechanical Process

Xiaoyan Xu

*** * **** ***. ***, Chicago, IL *****, USA; 312-***-****; *****@***.***

EDUCATION

PhD in Materials Science and Engineering (2013)

Illinois Institute of Technology, Chicago, IL, USA (GPA: 3.86)

Dissertation: Mechanical Properties and Sintering Mechanisms of Powder

Metallurgy Ti6Al4V.

Advisor: Prof. Philip Nash.

BS in Powder Materials Science and Engineering (2008)

Central South University, Hunan, P.R. China (GPA: 3.95)

RELATED WORK EXPERIENCE

Research Associate (1/2013-Now)

Cristal Metal Inc. and Thermal Processing Technology Center, Chicago, IL,

USA

o Drive the cooperative projects between Thermal Processing Technology

Center and Cristal Metal Inc. based on the Ti6Al4V post sintering

projects.

o Investigated the wet milling parameters for Armstrong process powder.

o Designed and implemented the hot forging process for the Cristal Metal

powder.

o Found out the corrosion mechanisms of Ni based alloy gasket in AlCl3

atmosphere.

o Written research proposals to seek external funding.

Engineering Internship (6/2011-9/2011)

Cristal Metal Inc., Chicago, IL, USA

o Characterize the Titanium and Titanium alloy powders fabricated by

Armstrong process, and optimize the press and sinter parameters worked

for the single press and sinter PM vehicle component applications.

o Identify the effect of high Na content on the Armstrong process CP Ti

powder and investigate the reason for the Na content after fabrication.

Research Assistant (8/2008-12/2012)

Illinois Institute of Technology, Chicago, IL, USA

o Cooperated with Webster-Hoff Co. to conduct research on powder

metallurgy of titanium and its alloys in vehicle applications. Develop

the powder metallurgy process for the truck parts. Obtained the best

combination of powder mix ratio, lubrication methods, compaction and

sintering parameters, which produced the truck parts with the optimum

mechanical properties and fulfill the requirements for vehicle

applications. Truck parts successfully met the fatigue property

requirements.

o Novel work on identifying sintering mechanism on sintering HDH blended

Ti6Al4V powder compact. Determined the diffusion paths and phase

formation during the sintering of HDH blended Ti6Al4V powder compact.

Found out that the fast shrinkage of this blend during sintering is due

to enhanced diffusion kinetics resulting from a combination of the

concentration gradient and stress induced by a phase transformation in

the ternary system.

o Novel work on identifying the sintering mechanisms for sintering the

Armstrong prealloyed Ti6Al4V powder by scientific theoretical

calculation and statistic analysis of the experimental data.

SKILLS

o Analysis: Ni based alloy corrosion analysis, fatigue analysis.

o Mechanical testing: tension, torsion, hardness, compression, fatigue,

fracture toughness, dilatometer and Gleeble 3500;

o Microstructure characterization: Optical Microscopy, SEM, EDS, EBSD,DSC

and XRD;

o Computer software (design, data/image collection and analysis): Pro-E,

ImageJ, Mathematica 8, Origin 8.5, Jade 5.0, Microsoft Office.

o Powder Metallurgy technology: Process design; Powder characterization;

SCHOLARSHIP /AWARDS

o First Prize Scholarship, Central South University (1/2005)

o First Prize Scholarship, Powder Metallurgy Research Institute

(10/2005,10/2006 and 10/2007)

o Arcelor Mittal Steel Scholarship (2/2007)

o Graduate College Dean's Fellowship, Illinois Institute of Technology

(8/2008)

o First Place of 2010 Research Poster Competition, PhD Category, MMAE

Department, Illinois Institute of technology (2/2010)

o Third Place of 2010 Research Poster Competition, PhD Category, ASM

International Chicago Region Chapter (3/2010)

CONFERENCE PROCEEDINGS/PUBLICATIONS

Conference Proceedings and Presentations:

o Xiaoyan Xu, Kerem Araci, Thomas Zwitter and Philip Nash, "Cost effective

press and sinter of Titanium and Ti6Al4V powder for low-cost component

in vehicle applications", Proceedings of PowderMet2010, MPIF,

FT.Lauderdale, USA, 6/2010.

o Xiaoyan Xu, Philip Nash, Yingjie Yan, Thomas Zwitter, Kamal Akhtar and

Kerem Araci, "Single press and sinter of Armstrong process Ti6Al4V

powder", 12th world Ti-conference, Beijing, China, 6/2011.

o Xiaoyan Xu, Philip Nash, Yingjie Yan and Thomas Zwitter, "Densification

and mechanical properties of sintered Ti6Al4V powder metallurgy

components", Proceedings of PowderMet2011, MPIF, San Francisco, USA,

5/2011.

o Thomas Zwitter, Xiaoyan Xu and Philip Nash, "Energy efficient press and

sinter of Titanium powder for low-cost components in vehicle

applications.", Proceedings of PowderMet2009, MPIF, Las Vegas, USA,

6/2009.

Publications:

o Xiaoyan Xu and Philip Nash, "Sintering of Blended Ti6Al4V Powder",

submitted to J. Materials Science, 5/2013.

o Xiaoyan Xu and Philip Nash, "Sintering Mechanisms of Armstrong

Prealloyed Ti6Al4V", in preparation.

Contact this candidate