Metallurgical/Materials Engineer

Kun Liu Ph.D/Jr. Eng.

Tel.: 1-581-***-****; Email: ***.***@****.**

Personal Profile

Strong abilities improving the process and properties by characterizing materials with all kinds of methods, such as optical microscopes, scanning electron microscopes and various image analysis software and other characterization techniques.

Solid Knowledgeable in physical and mechanical metallurgy, foundry processes and forming process (extrusion, rolling, etc.) of Aluminum alloys.

Excellent understanding of the thermodynamics, phase metallurgy, phase transformation as well as the heat treatment design.

Professional experience in various material properties test and analyses, including the mechanical test, fracture toughness and fatigue as well as their fracture surface characterization.

Recognized good team worker and leader for multi-projects.

Strong organizational skills, autonomy, effective communication skills and open to receiving and making suggestions. .

Fluent in English, French and Chinese.

Certificates

Aluminum products and Aluminum Transformation, 2012.

Control of Mineral Processing Systems, 2014

Lean 6 sigma and industrial problems solving, 2015;

Skills

Laboratory skills Optical microscopy (OM) with image analysis; Scanning Electron Microscope (SEM); Transmission Electron Microscope (TEM) ; Electron Back-scattered Diffraction (EBSD); Differential scanning calorimeter (DSC); X-ray diffraction (XRD);

Professional skills in metallurgy and materials science: Physical metallurgy; Casting technologies; deformation processes (extrusion and rolling); Heat treatment design; Mechanical property test; Fatigue test; Fracture analysis;

Computer skills: Thermo-Calc, MS office, Auto CAD, Metlab and easily adapted to the ready-made software.

Industrial and Research Experience

Researcher, University of Québec at Chicoutimi, QC, Canada 2013-Now

Communicate with the material provides and customer to properly define the projects.

Manage and maintain of various experimental equipment, such as Optical and electron microscopy, and tensile testing unit.

Evolution of dispersoids and hot-deformation behavior of 6xxx and 7xxx alloys under various heat treatments.

Coordinate a team to develop the applications of aluminum alloy at elevated temperature, including wrought aluminum alloy (3xxx, 4xxx and 6xxx) and casting aluminum alloy (3xx) via dispersoids.

Explore thermal mechanical fatigue and low cycle fatigue behaviors of various aluminum alloys, such as 6xxx and 2xxx alloys. .

Optimizing the properties of 8xxx alloys as aluminum conductor alloy.

Identified the formation of “fir-tree” zone and the effect of V on it in AA1050 alloy.

The different behaviors of aluminum alloy under tensile and compression tests

Brazing aluminum alloys in the open-air environment.

Fabricating the Metal Matrix Nano-composites---Aluminum alloy with different particles, such as, B4C, TiB2 and Al2O3 nano particles.

Research assistant, University of Québec at Chicoutimi, QC, Canada 2008-2013

Developed the new environment-friendly Al-Cu 206 cast alloy with tolerantly higher Fe content.

Design the casting map for industrial Al-Cu 206 alloys.

Explore the application of AA2618 alloy from as-treated condition.

Skilled in operation and interpretation of properties test and materials characterization techniques, such as tensile test, creep test and hot deformation as well as SEM/TEM, XRD, DSC, EBSD, fracture analysis.

Associate researcher (part time), Kuaijie Qinxi Service Co., Ltd (China) 2006-2008

Established and optimized the processes for microscope observations and properties tests.

Operate various tests, including mechanical test, hardness tests and fatigue tests, to obtain the alloy properties

Education Background

PhD in Metallurgy and Materials Science Engineering 2008 -2013

University of Quebec at Chicoutimi-Chicoutimi, QC, CA

Thesis: Solidification of iron-rich intermetallic phases and their effects on tensile properties in Al-Cu 206 cast alloys

Identified the various iron-rich intermetallics in Al-Cu 206 cast alloys at various iron contents, including solidification sequence and possible nucleation mechanism.

Designed the casting process maps for Al-Cu 206 cast alloys at various iron contents.

Studied the phase transformation during the various heat treatments to optimize the heat treatments for various Fe contents in Al-Cu 206 alloys.

Clarified the effect of iron contents and iron-rich intermetallics on the mechanical properties of Al-Cu 206 cast alloy.

Developed new high-iron content 206 cast alloys with moderate-high iron contents but competitive properties, making casting the environmental-friendly Al-Cu alloys with recycled aluminum alloys real.

Master in Material Science 2006-2008

Northeastern University- Shenyang, Liaoning, China

Thesis: On the heat-treatment of 7XXX ultra high strength aluminum alloy

Clarified the relationship between heat treatment (solution and aging treatment) and strength and stress corrosion and exfoliation corrosion resistance n 7xxx Al-Zn-Mg-Cu alloy.

Systematically studied the evolution of precipitated in grains and grain boundaries in 7xxx alloy with various heat treatments.

Developed the novel heat treatment for 7xxx Al-Zn-Mg-Cu plates meeting the requirements for the aerospace and auto applications with balanced strength and SCC resistance.

Bachelor in Material Science and Engineering 2002-2006

Northeastern University- Shenyang, Liaoning, China

Obtaining the professional knowledge on non-ferrous and ferrous alloys.

Created the strong interest in the research in metals and alloys.

Professional training on the sample preparation and microstructure observation on aluminum alloys, especially on 2xxx, 6xxx and 7xxx alloys.

Publications

Patent:

1.Improve high temperature properties of 3xxx aluminum alloys by Mo addition and two-step heat treatment, in process.

2.Thermal stable 3XXX aluminum alloys for high temperature applications, in process.

3.Aluminum conductor alloys having improved creeping resistance (US patent No. 62/365020)

Journal articles:

4.K. Liu, X. –G. Chen, “Evolution of microstructure and elevated-temperature properties with Mn addition in Al-Mn-Mg alloys”, Journal of Materials Research, 2017 32(13), 2585-2593. (one of images is selected as the cover of journal) .

5.K. Liu, X. –G. Chen, “Influence of heat treatment and its sequence on elevated-temperature properties of Al-Mn-Mg 3004 alloy”, Materials Science and Engineering A, 2017, 697: 141-148.

6.K. Liu, Hezhaoye Ma, X. –G. Chen, “Enhanced elevated-temperature properties via Mo addition in Al-Mn-Mg 3004 alloy”, Journal of alloys and compounds, 2017, 694:354-365.

7.K. Liu, A. M. Nabawy, X. –G. Chen, “Influence of TiB2 nano-particles on the elevated-temperature properties in Al-Mn-Mg 3004 alloy”, Transactions of Nonferrous Metals Society of China, 2017, 27:771-778.

8.L. Pan, K. Liu, F. Breton, X. –G. Chen, “Effects of minor Cu and Mg additions on microstructure and materials properties of 8xxx aluminum conductor alloys”, Journal of materials research, 2017, 32: 1094-1104.

9.L. Pan, K. Liu, F. Breton, X. –G. Chen, “Effect of Fe on microstructure and properties of 8xxx aluminum conductor alloys”, Journal of Materials Engineering and Performance, 2016, 25: 5201-5208.

10.A. Bolouri, K. Liu, X. –G. Chen, “Effects of iron-rich intermetallics and grain structure on semisolid tensile properties of Al-Cu 206 cast alloys near solidus temperature”, Metallurgical and Materials Transaction A, 2016, 47: 6466-6480.

11.L. Pan, F. A. Mirza, K. Liu, X. –G. Chen, “Effect of Fe-rich particles and solutes on creep behavior of 8xxx alloys”, Materials Science and Technology, 2017, 33: 1130-1137.

12.K. Liu, X.-G. Chen, “Evolution of intermetallics, dispersoids and elevated-temperature properties at various Fe contents in Al-Mn-Mg 3004 alloys”, Metallurgical and Materials Transaction B, 2016, 47B: 3291-3300.

13.K. Liu, X.-G. Chen, “Development of Development of Al-Mn-Mg 3004 alloy for applications at elevated temperature via dispersoid strengthening ”, Materials & Design, 2015,84 (5):340-350 .

14.K. Liu, X. Cao, X.-G. Chen, “Effect of iron-rich intermetallics on tensile deformation of Al-Cu 206 cast alloys”, Metallurgical and Materials Transaction B, 2015, 46B(4):1566-1575.

15.K. Liu, X. Cao, X.-G. Chen, “Tensile Properties of Al-Cu 206 Cast Alloys with Various Iron Contents”, Metallurgical and Materials Transaction A, 2014, 45A(5):2498-2507

16.K. Liu, X. Cao, X.-G. Chen, “Solid-state transformation of iron-rich intermetallic phases in Al-Cu 206 cast alloys during solution heat treatment”, Metallurgical and Materials Transaction A, 2013, 44A (8): 3494-3503.

17.K. Liu, X. Cao, X.-G. Chen, “Formation and phase selection of iron-rich intermetallics in Al-4.6Cu-0.5Fe cast alloys”, Metallurgical and Materials Transaction A, 2013, 44A (2): 682-695.

18.K. Liu, X. Cao, X.-G. Chen, “Precipitation of iron-rich intermetallic phases in Al-4.6Cu-0.5Fe-0.5Mn cast alloy”, Journal of Materials Science, 2012, 43A (10): 4290-4298.

19.K. Liu, X. Cao, X.-G. Chen, “A new iron-rich intermetallic--AlmFe phase formed in Al-4.6Cu-0.5Fe cast alloy”, Metallurgical and Materials Transaction A, 2012, 43A (4): 1097-1101.

20.K. Liu, X. Cao, X. -G. Chen, “Effect of Mn, Si and cooling rate on the formation of iron-rich intermetallics in 206 cast alloys”, Metallurgical and Materials Transaction B, 2012, 43B (5): 1231-1240.

21.K. Liu, X. Cao, X.-G. Chen, “Solidification of iron-rich intermetallic phases in Al-4.5Cu-0.3Fecast alloy”, Metallurgical and Materials Transaction A, 2011, 42A (7): 2004-2016.

22.K. Liu, X. –G. Chen, “Influence of two-step heat treatments on the elevated-temperature properties in Al-Mn-Mg alloy”, Metallurgical and Materials Transaction B, 2017.

23.K. Liu, X. –G. Chen, “ Role of iron-rich intermetallics and Si particles in the high-temperature tensile properties in Al-Si 319 casting alloy”, submitted to Metallurgical and Materials Transaction A, 2017.

24.K. Liu, X. –G. Chen, “Evolution of elevated-temperature strength and creep resistance during multi-step heat treatments in Al-Mn-Mg 3004 alloy”, submitted to Materials Science and Engineering A, 2017.

Conference papers/posters:

25.K. Liu, M. He, X.-G Chen, “ Evolution of elevated-temperature properties under two-step heat treatments in Al-Mn-Mg 3004 alloy”, COM 2017, Vancouver, CA, 2017.

26.F. A. Mirza, K. Liu, X.-G. Chen, “Cyclic Stress-Strain Behavior and Low Cycle Fatigue Life of AA6061 Aluminum Alloy", TMS-Light metals, 2017, San Diego, USA, 2017

27.L. Pan, K. Liu, F. Breton, X. –G. Chen, “Effects of minor alloying elements on microstructure and creep properties of 8xxx aluminum conductor alloys”, COM 2016, Quebec, CA, 2016

28.K. Liu, A. M. Nabawy, X. –G.Chen, “Influence of TiB2 nano-particles on the elevated-temperature properties in Al-Mn-Mg 3004 alloy”, ICAA 15, Chongqing, China, 2016.

29.K. Liu, X.-G. Chen, “Effect of Fe on the evolution of microstructure and elevated temperature properties in Al-Mn-Mg 3004 alloys”, COM2015-Advances in Materials Manufacturing, 2015.

30.K. Liu, X. Cao, X.-G. Chen, “Role of iron-rich intermetallics on the tensile deformation in Al-Cu 206 cast alloys”, invited presentation, COM2014-Advances in Materials Manufacturing, 2014.

31.K. Liu, X. Cao, X.-G. Chen, “Evolution of Iron-Rich Intermetallic Phases in Al-Cu 206 Cast Alloys”, COM2014-Light metals, 2014.

32.K. Liu, X. Cao, X.-G. Chen, “Effect of cooling rate on the solidification characteristics of iron-rich intermetallics in 206 Al-Cu cast alloys”, TMS 2013-Light metals, 2013, pp. 311-316.

33.K. Liu, X. Cao, X.-G. Chen, “Effect of Mn and Si on iron-containing intermetallics in cast 206 aluminum alloys”, COM2010-Light metals, 2010, pp. 113-120.

34.L. F. Jin, K. Liu, X. –G. Chen, “Formation of β-Al5FeSi with various Fe and Mo additions in Al-Si-Cu-Mg foundry alloys”, Encyclopaedia of Research on Aluminium in Quebec – 2016 Edition, P. 50.

35.C. Li, K. Liu, X. –G. Chen, “Effect of Mn and Heat Treatment on Dispersoids in AA6082 Alloys”, Encyclopaedia of Research on Aluminium in Quebec – 2016 Edition, P. 42.

36.L. F. Jin, K. Liu, X. –G. Chen, “ Effect of Mo on the microstructure and microhardness of 319 foundry alloy”, Encyclopaedia of Research on Aluminium in Quebec – 2015 Edition, P. 50.

37.L. Pan, K. Liu, F. Breton, X. –G. Chen, “Effects of minor Cu and Mg alloying on the microstructure and creep properties of 8xxx electric conductor alloys”, Encyclopaedia of Research on Aluminium in Quebec – 2014 Edition, P. 52.

38.K. Liu, X. -G. Chen, “The promising applications of AA 3004 alloy at elevated temperature”, Encyclopaedia of Research on Aluminium in Quebec – 2014 Edition, P. 44.

39.K. Liu, X. -G. Chen, “Effect of precipitation treatment on the properties of AA3004 alloy at elevated temperature”, Encyclopaedia of Research on Aluminium in Quebec – 2013 Edition, P. 39.

40.K. Liu, X. Cao, X. -G. Chen, “On the mechanical properties of 206 alloys at high iron contents”, The Encyclopaedia of Research on Aluminium in Quebec – 2012 Edition, p. 53.

41.K. Liu, X. Cao, X.-G. Chen, “A new iron-rich intermetallic phase -AlmFe formed in 206 type cast alloy with 0.5Fe”, Encyclopaedia of Research on Aluminium in Quebec – 2011 Edition, p.43.

42.K. Liu, X. Cao, X.-G. Chen, “The role of oxide films on the nucleation of iron-rich intermetallics in cast 206 alloy”, Encyclopaedia of Research on Aluminium in Quebec – 2010 Edition, p.50.

43.K. Liu, X. Cao, X.-G. Chen, “Effect of manganese and silicon on iron intermetallics in 206 foundry alloy”, Encyclopaedia of Research on Aluminium in Quebec – 2009 Edition, p.50.

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