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Engineer Mechanical

Worcester, Massachusetts, United States
February 22, 2018

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Xiaoqing Cai

** ******* **, *** ** 508-***-****

Worcester, MA, USA


Full time as an engineer.


Characterization Equipment: Surface Hardness, Microhardness, X-ray Diffraction (XRD), Scanning Electron Microscopy (SEM), Optical Emission Spectrometry (OES), Electron Backscatter Diffraction (EBSD), Tensile/Imapct tests, Fatigue test, Differential scanning calorimetry (DSC).

Software: MATLAB, Auto CAD, Microsoft Office (Word, Excel, PowerPoint).


Systematically investigated and established the processing – microstructure – properties links in comparison of furnace and induction tempering of AISI 4140 alloy steels.

Won the first place in the student poster competition at the 28th ASM Heat Treating Society Conference, Detroit, MI, October 2015 and 2016 HTS/Bodycote Best Paper in Heat Treating Award.

Attended international conferences, including The Minerals, Metals & Materials Society 2017, Materials Science & Technology Conference & Exhibition 2016 and Heat Treating Society 2015&2013.

Presented as Keynote Speaker for Furnaces North America 2016.


Worcester Polytechnic Institute (WPI), Worcester, MA

Ph.D., Materials Science and Engineering, GPA 3.92/4.00 05/2014-Present

M.S., Materials Science and Engineering, GPA 3.80/4.00 08/2012- 05/2014

Northeastern University, Shenyang, China 08/2008-06/2012

B.S., Material Forming and Control Engineering, GPA 3.26/4.00


Thesis: Comparison of Induction and Furnace Tempering, WPI/Thermatool 06/2013-12/2017

Developed a simulation tool to predict the tempering parameters for furnace and induction tempering to achieve the desirable properties for industry application.

Conducted induction heating process at Thermatool Corp, East Haven, CT to create samples for future testing.

Built hardness simulation for different tempering parameters based on the hardness experimental results and Hollomon-Jaffe equations in Excel and Matlab.

Recommended updates in process for induction tempering process could provide higher toughness than furnace tempering process when they achieved the same strength, using surface hardness, tensile tests and impact tests results.

Used SEM, EBSD and TEM to evaluate the effects of carbides on mechanical properties.


Cost Engineer Internship, Daimler Fuso, Japan 01/2018-Present

Anti Corrosion cost project 01/2018-Present

Visited supplier and discussed with R&D department.

Calculated the cost for different coating processes.

Negotiated with supplier.

Research Assistant, Center for Heat Treatment Excellence, WPI 05/2014-12/2017

Development of Carburizing Tool Software, WPI 05/2013-12/2017

Developed CarburizeTool software to simulate carbon concentration and surface hardness based on process parameters.

Provided carburizing treatment for AISI 8620, AISI 4140, AISI 52100 and AISI 9310.

Used OES to measure carbon content for different depth.

Measured microhardness for different depth.

Wrote reports to confirm the experimental results and simulation results were in great agreement.

Research Assistant, Northeastern University, China 01/2008-06/2008

Characterization of X100 high strength pipeline steel: microstructure and mechanical properties.

Improved the mechanical properties of the gas pipeline to achieve high strength with high ductility.

Designed the heat treatment experiments of X100 alloy steels.

Conducted mechanical tests, including surface hardness, impact tests and tensile tests.

Used SEM and optical microscopy to observe the microstructure and fracture surface.

Analysis the relationship between the microstructure and mechanical properties with different tempering temperature.

Assistant Engineer, Benxi Steel Group Corporation, Liaoning, China 07/2007-09/2007

Investigate the existing rolling process for commercial sheet products

Analysis the morphology and microstructure of samples from different processes

Recommend production parameters to achieve better properties


X Cai. Microstructure and Mechanical Properties Development in AISI 4140 Steels during Tempering. Submitted to Materials Science & Engineering: A.

X Cai. Modeling the mechanical properties of quenched and tempered martensitic steels. In23rd IFHTSE Congress 2016 Apr 21. Asm.

H Yu, Y Lu, X Cai, RD. Sisson, Microstructural Analysis of Carbides in Steel by Electrochemical Extraction Technique. In 23rd IFHTSE Congress 2016 Apr 20. ASM.

Y Lu, H Yu, X Cai, Y Rong, RD. Sisson. Martensite Lattice Parameter Measured by Modern X-ray Diffraction in Fe-C alloy. In 23rd IFHTSE Congress 2016 Apr 20. ASM.

M Yang, L Zhang, X Cai, A Wang, RD. Sisson, “Modeling Steel Surface Treating Processes–Nitridetool”. In 5th International Conference on Thermal Process Modeling and Computer Simulation June 16–18, 2014, ASM.

L Zhang, A Wang, X Cai, M Yang, RD. Sisson, “Modeling Steel Surface Treating Processes – Carbonitridetool”, In 5th International Conference on Thermal Process Modeling and Computer Simulation June 16–18, 2014, ASM.


Volunteer, Materials Engineering, WPI & ASM (American Society for Metals) International 05/2014

Guided high school students to visit the materials lab and help instructors introduce modules built to help students have basic knowledge of materials science.

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