American Journal of Materials Science

American Journal of Materials Science publishes reviews, full-length papers, and short communications recording original research results on, or techniques for studying the relationship between structure, properties, and uses of materials.


Chi Tat Kwok

Editorial Board Member of American Journal of Materials Science

Associate Professor, University of Macau, China

Research Areas

Materials Science, Laser Materials Processing, Corrosion & Wear of Materials

Education

1999Ph.DThe Hong Kong Polytechnic University, Hong Kong
1996M.Phil.The Hong Kong Polytechnic University, Hong Kong
1993B.ScThe Hong Kong Polytechnic University, Hong Kong

Experience

2007-presentAssociate Professor, Department of Electromechanical Engineering, Faculty of Science & Technology, University of Macau
2000-2007Assistant Professor, Department of Electromechanical Engineering, Faculty of Science & Technology, University of Macau

Publications: Journals

[1]  K.H. Lo, C.T. Kwok, W.K. Chan, Characterisation of duplex stainless steel subjected to long-term annealing in the sigma phase formation temperature range by the DLEPR test, Corrosion Science, doi:10.1016/j.corsci.2011.07.013 (in press).
[2]  B.K. Zhang, C.T. Kwok, F.T. Cheng, H.C. Man, 'Fabrication of Nano-structured HA/CNT Coatings on Ti6Al4V by Electrophoretic Deposition for Biomedical Applications', Journal of Nanoscience and Nanotechnology, (in press).
[3]  C.T. Kwok, K.H. Lo, W.K. Chan, F.T. Cheng, H.C. Man, 'Effect of Laser Surface Melting on Intergranular Corrosion Behavior of Aged Austenitic and Duplex Stainless Steels', Corrosion Science, 53 (2011) 1581-1591.
[4]  K.H. Lo, D. Zeng, C.T. Kwok, Effects of Sensitisation-induced Martensitic Transformation on the Tensile Behaviour of 304 Austenitic Stainless Steel, Materials Science and Engineering A, Vol. 528 (2011) 1003-1007.
[5]  C.T. Kwok, P.K. Wong, H.C. Man, F.T. Cheng, 'Sliding Wear and Corrosion Resistance of Copper-based Overhead Catenary for Traction Systems', International Journal of Railway, Vol. 3, No. 1 (2010) 19-27.
[6]  C.T. Kwok, P.K. Wong, "Laser Surface Alloying of Various Engineering Alloys for Sliding Wear and Corrosion Resistance", Journal of Laser Micro/Nanoengineering, Vol. 5 (2010) 90-96.
[7]  C.T. Kwok, P.K. Wong, H.C. Man, F.T. Cheng, 'Effect of pH on Corrosion Behavior of CuCrZr in Solution without and with NaCl', Journal of Nuclear Materials, Vol. 394 (2009) 52-62.
[8]  C.T. Kwok, P.K. Wong, F.T. Cheng, H.C. Man, 'Characterization and Corrosion behavior of Hydroxyapatite Coatings on Ti6Al4V Fabricated by Electrophoretic Deposition', Applied Surface Science, Vol. 255 (2009) 6736-6744.
[9]  C.T. Kwok, F.T. Cheng, H.C. Man, K.I. Leong, "Laser Surface Modification of Various Tool Steels for Improving Corrosion Resistance and Hardness", Key Engineering Materials, "Progress in Surface Treatment", Vol. 384 pp.125-155 (2008).
[10]  C.T. Kwok, F.T. Cheng, H.C. Man, "Microstructure and Corrosion Behavior of Laser Surface-melted High-speed Steels", Surface and Coatings Technology, Vol. 202, pp. 336-348 (2007).
[11]  C.T. Kwok, S.L. Fong, F.T. Cheng & H.C. Man, "Pitting and Galvanic Corrosion Behavior of Laser-Welded Stainless Steels", Journal of Materials Processing Technology, Vol. 176 pp. 168-178 (2006).
[12]  C.T. Kwok, F.T. Cheng, H.C. Man & W.H. Ding, "Corrosion Characteristics of Nanostructured Layer on 316L Stainless Steel Fabricated by Cavitation-annealing", Materials Letters, Vol. 60, pp. 2419-2422 (2006).
[13]  C.T. Kwok, F.T. Cheng & H.C. Man, "Cavitation Erosion and Corrosion Behaviors of Laser-aluminized Mild Steel", Surface and Coatings Technology, Vol. 200, pp. 3544-3552 (2006).
[14]  K.H. Lo, F.T. Cheng, C.T. Kwok & H.C. Man, "Effects of Laser Treatments on Cavitation Erosion and Corrosion of AISI 440C Martensitic Stainless Steel", Materials Letters, Vol. 58, pp. 88-93 (2004).
[15]  K.H. Lo, C.T. Kwok, F.T. Cheng & H.C. Man, "Corrosion Resistance of Laser-fabricated Metal-matrix Composite Layer on Stainless Steel 316L", Journal of Laser Applications, Vol. 15, pp. 107-114 (2003).
[16]  K.H. Lo, F.T. Cheng, C.T. Kwok, H.C. Man, "Improvement of Cavitation Erosion Resistance of AISI 316 Stainless Steel by Laser Surface Alloying Using Fine WC Powder" Surface and Coatings Technology, Vol. 165, pp. 258-267 (2003).
[17]  C.T. Kwok, K.I. Leong, F.T. Cheng & H.C. Man, "Microstructural and Corrosion Characteristics of Laser Surface-Melted Plastics Mold Steels", Materials Science and Engineering A, Vol. 357, pp. 94-103 (2003).
[18]  C.T. Kwok, K.H. Lo, F.T. Cheng & H.C. Man, "Effect of Processing Conditions on the Corrosion Performance of Laser Surface-melted AISI 440C Martensitic Stainless Steel", Surface and Coatings Technology, Vol. 166, pp. 221-230 (2003).
[19]  F.T. Cheng, C.T. Kwok & H.C. Man, "Cavitation Erosion Resistance of Stainless Steel Laser Clad with WC-reinforced MMC", Materials Letters, Vol. 57, pp.969-974 (2002).
[20]  F.T. Cheng, C.T. Kwok & H.C. Man, "Laser Surfacing of S31603 Stainless Steel with Engineering Ceramics for Cavitation Erosion Resistance", Surface and Coatings Technology, Vol. 139, pp. 14-24 (2001).
[21]  C.T. Kwok, F.T. Cheng & H.C. Man, "Laser-fabricated Fe-Ni-Co-Cr-B Austenitic Alloy on Steels. Part II. Corrosion Behaviour and Corrosion-erosion Synergism", Surface and Coatings Technology, Vol. 145, pp. 205-214 (2001).
[22]  C.T. Kwok, F.T. Cheng & H.C. Man, "Laser-fabricated Fe-Ni-Co-Cr-B Austenitic Alloy on Steels. Part I. Microstructures and Cavitation Erosion Behaviour", Surface and Coatings Technology, Vol. 145, pp. 194-205 (2001).
[23]  C.T. Kwok, H.C. Man & F.T. Cheng, "Cavitation Erosion-corrosion Behaviour of Laser Surface Alloyed AISI 1050 Mild Steel Using NiCrSiB", Materials Science and Engineering A, Vol. 303, pp. 250-261 (2001).
[24]  C.T. Kwok, F.T. Cheng & H.C. Man, "Laser Surface Modification of UNS S31603 Stainless Steel. Part II: Cavitation Erosion Characteristics", Materials Science and Engineering A, Vol. 290, pp. 74-88 (2000).
[25]  C.T. Kwok, F.T. Cheng & H.C. Man, "Laser Surface Modification UNS S31603 Stainless Steel. Part I: Microstructures and Corrosion Characteristics", Materials Science and Engineering A, Vol. 290, pp. 55-73 (2000).
[26]  H.C. Man, C.T. Kwok & T.M. Yue, "Cavitation Erosion and Corrosion Behaviour of Laser Surface Alloyed MMC of SiC and Si3N4 on Al Alloy AA6061", Surface and Coatings Technology, Vol. 132, pp. 11-20 (2000).
[27]  C.T. Kwok, F.T. Cheng & H.C. Man, "Synergistic Effects on Cavitation Erosion and Corrosion of Various Engineering Alloys in 3.5% NaCl Solution", Materials Science and Engineering A, Vol. 290, pp. 145-154 (2000).
[28]  C.T. Kwok, F.T. Cheng & H.C. Man, "Cavitation Erosion and Pitting Corrosion Behaviour of Laser Surface-melted Martensitic Stainless Steel UNS S42000", Surface and Coatings Technology, Vol.126, pp. 238-255 (2000).
[29]  C.T. Kwok, F.T. Cheng & H.C. Man, "Laser Surface Modification of UNS S31603 Stainless Steel Using NiCrSiB Alloy for Enhancing Cavitation Erosion Resistance", Surface and Coatings Technology, Vol. 107, pp. 31-40 (1998).
[30]  C.T. Kwok, H.C. Man & F.T. Cheng, "Cavitation Erosion and Pitting Corrosion of Laser Surface Melted Stainless Steels", Surface and Coatings Technology, Vol. 99, pp. 295-304 (1998).
[31]  C.T. Kwok, H.C. Man & F.T. Cheng, "Cavitation Erosion of Duplex and Super Duplex Stainless Steels", Scripta Materialia, Vol. 39, No. 9, pp. 1229-1236 (1998).
[32]  C.T. Kwok, H.C. Man & F.T. Cheng, "Cavitation Erosion and Damage Mechanisms of Alloys with Duplex Structure", Materials Science and Engineering A, Vol. 242, pp. 108-120 (1998).
[33]  C.T. Kwok, H.C. Man & L.K. Leung, "Effect of Temperature, pH and Sulphide on Cavitation Erosion of Super Duplex Stainless Steel", Wear, Vol. 211, pp. 84-93 (1997).

Publications: Conferences/Workshops/Symposiums

[1]  P.K. Wong, C.M. Tou, W.S. Kam, C. T. Kwok, 'Enhancement in Wear Resistance of Copper Contact Wire by Laser Surface Treatment for Electric Railway Systems', Proceedings of the 8th Engineers Forum of Guangdong, Hongkong, Macau, Fujian and Taiwan (2010 GHMT), Xiamen, November, 19-20, 2010 (CD-ROM paper).
[2]  C.M. Tou, W.S. Kam, P.K. Wong, C.T. Kwok, 'Study on a Wear Resistant Overhead Contact Line Material for Electric Railway Systems', Proceedings of the 8th Engineers Forum of Guangdong, Hongkong, Macau, Fujian and Taiwan (2010 GHMT), Xiamen, November, 19-20, 2010 (CD-ROM paper).
[3]  P.K. Wong, W.S. Kam, C.M. Tou, C.T. Kwok, 'A Study on Arc Erosion and Corrosion of Laser-alloyed Copper for Electric Railway Systems', The 5th Symposium on Sustainable Development-Cooperation Among Hong Kong, Macau and Guangdong, Hong Kong, Macau and Guangdong, September 27-30, 2010, pp. 437-441.
[4]  W.K. Chan, C.T. Kwok, K.H. Lo, 'Effect of Laser Surface Melting on Corrosion Behavior of Aged Duplex Stainless Steel', Proceedings of the 29th International Congress on Applications of Lasers & Electro-Optics 2010 (ICALEO '10), Miami, USA, 27-30 Sept. 2010, Paper no. 1703, pp. 588-596.
[5]  C.T. Kwok, P.K. Wong, W. K. Chan, F.T. Cheng, H.C. Man, 'Laser Surface Alloying of Mn-Ni-Al Bronze for Cavitation Erosion Resistance', Proceedings of the 29th International Congress on Applications of Lasers & Electro-Optics 2010 (ICALEO '10), Miami, USA, September 27-30, 2010, (CD-ROM paper no. 1105)
[6]  Z. Cheng, C.T. Kwok, K.H. Lo, 'Laser Surface Melting of 17-4 PH Precipitation-Hardenable Stainless Steel', Proceedings of the 3rd Pacific International Conference on Application of Lasers and Optics (PICALO 2010), March 23-25, Wuhan, China (CD-ROM paper).
[7]  W.K. Chan, C.T. Kwok, K.H. Lo, Z. Cheng, 'Desensitization of Austenitic and Duplex Stainless Steels by Laser Surface Melting', Proceedings of the 3rd Pacific International Conference on Application of Lasers and Optics (PICALO 2010), March 23-25, Wuhan, China (CD-ROM paper).
[8]  B.K. Zhang, C.T. Kwok, F.T. Cheng, H.C. Man, 'Fabrication of Nano-structured HA/CNT Coatings on Ti6Al4V by Electrophoretic Deposition for Biomedical Applications', Proceedings of 3rd IEEE International NanoElectronics Conference (INEC 2010), January 3-8, City University, Hong Kong, pp.813-814.
[9]  P.K. Wong, C.T. Kwok, H.C. Man, F.T. Cheng, 'Laser Surfacing of Hard Metals on Copper for Contact Line Applications', TACT 2009 International Thin Films Conference, December 14-16, Taipei, Taiwan.
[10]  P.K Wong, W.K. Chan, C.T. Kwok, K.H. Lo, 'Applications of laser remanufacturing for wear and corrosion resistance', Proceedings of 6th International Symposium on Environmentally Conscious Design and Inverse Manufacturing (EcoDesign 2009), December 7-9, 2009, Sapporo, Japan, pp.303-307.
[11]  W.K. Chan, C.T. Kwok, K.H. Lo, S.F. Wong, 'The Critical Part of PEMFC-Super Duplex Stainless Steel Bipolar Plates' 6th International Symposium on Environmentally Conscious Design and Inverse Manufacturing (EcoDesign 2009), December 7-9, 2009, Sapporo, Japan, pp.1185-1190.
[12]  P.K. Wong, C.T. Kwok, H.C. Man, F.T. Cheng, "Sliding Wear of Copper-based Overhead Contact Wires for Electric Railway System", The International Symposium on Speed-up, Safety, and Service Technology for Railway and Maglev System, June 16-19, 2009, Niigata, Japan (paper no. 359829).
[13]  P.K. Wong, C.T. Kwok, "Electrical Sliding Wear and Corrosion Behavior of Contact Line Materials For Electric Traction Systems", 1st Nanshan District Academic Forum of PhD Candidates' from Shenzhen, Hong Kong, Macao and Taiwan, 196th PhD Candidates' Academic Forum, November 18-19, 2008, Shenzhen, China (CD-ROM paper).
[14]  C.T. Kwok, S.L Fong, F.T. Cheng, H.C. Man, "Microstructure and Corrosion Behavior of Laser Welds between Dissimilar Stainless Steels", Proceedings of the 3rd Pacific International Conference on Application of Lasers and Optics (PICALO 2008), April 16-18, Beijing, China (CD-ROM paper 609).
[15]  C.T. Kwok, "Selection of Metallic Bipolar Plates of Polymer Electrolyte Membrane Fuel Cells for Corrosion Resistance", 5th International Symposium on Environmentally Conscious Design and Inverse Manufacturing (EcoDesign 2007), December 10-13, 2007, Tokyo, Japan (CD-ROM paper S2-1-1F).
[16]  C.T. Kwok, W.H. Ding, "Optimization of Citric Acid Passivation for Corrosion Resistance of Stainless Steel 440C" 5th International Symposium on Environmentally Conscious Design and Inverse Manufacturing (EcoDesign 2007), December 10-13, 2007, Tokyo, Japan (CD-ROM paper P6).
[17]  C.T. Kwok, H.C. Man, F.T. Cheng, "Laser Surface Melting of Tool Steels H13, O1 and D6", Proceedings of the 26th Int. Congress on Applications of Lasers & Electro-optics (ICALEO '07), Orlando, USA, Oct. 29-Nov. 1, 2007 (CD-ROM paper).
[18]  P.K. Wong, C.T. Kwok, "Corrosion of Nano-hydroxyapatite Coating on Titanium Fabricated by Electrophoretic Deposition", Medical Device Materials IV: Proceedings of the Materials and Processes for Medical Devices Conference 2007, Palm Desert, USA, Sept 23-25, p 213-218 (2008).
[19]  C.T. Kwok, P.K. Wong, "Corrosion Behavior of Laser-fabricated Hydroxyapatite Coating on Titanium Alloy for Biomedical Applications", Ti-2007 Science & Technology, Vol. II, Proceedings of the 11th World Conference on Titanium (JIMIC5), Kyoto, Japan, June 3-7, 2007, pp. 1557-1560.
[20]  C.T. Kwok, "Potential Contamination of Saline Drinking Water of Macao Due to Corrosion of Plumbing Alloys", International Symposium in Sustainable and Safe Water Supplies, Jan. 15-16, 2007, The University of Hong Kong, Hong Kong, p. 57 (Poster Presentation).
[21]  C.T. Kwok, K.W. Lei, "Corrosion Resistance of Bipolar Plate Alloys for Proton Exchange Membrane Fuel Cells", Proceedings of Symposium on City Energy Technology, Dec. 9-10, 2006, Macau, pp.119-133.
[22]  C.T. Kwok, "Fabrication of Carbon Nanotube Reinforced Hydroxyapatite Coating on Stainless Steel 316L by Laser Surface Treatment", 11th Internatinal Conference on Precision Engineering-Toward Synthesis of Micro/Nano Systems (11th ICPE), Tokyo, Japan, August 16-18, 2006, pp. 261-265.
[23]  P.K. Wong, C.T. Kwok, "A Comparative Study on the Electrochemical Behavior of Hydroxyapatite Coatings on Stainless Steel 316L", The Institutes of Engineering and Technology Hong Kong, Younger Members Exhibition/Conference 2006 Proceedings, The Institutes of Engineering and Technology, Hong Kong, June 25, 2006, pp. 207-219.
[24]  S.F. Wong, C.T. Kwok, Z.X. Yang & K.H. Lo, "Knowledge-oriented Application in Web-enabled Training System", Proceedings of The 36th International Conference on Computers and Industrial Engineering, 20-23 June 2006, Taipei, Taiwan, 2998-3005.
[25]  H.C. Man, C.T. Kwok, F.T. Cheng & K.I. Leong, "Laser Surface Melting of High-speed Steels for Enhancing Surface Properties", Proceedings of the 24th International Congress on Applications of Lasers & Electro-Optics 2005 (ICALEO '05), Miami, USA, 31 Oct-3 Nov (2005), CD-ROM.
[26]  C.T. Kwok, K.I. Leong, F.T. Cheng & H.C. Man, "Enhancement in Properties of High-speed Steel by Laser Surface Treatment", The 3rd International Conference on Leading Edge Manufacturing in the 21st Century (LEM21), Vol. 1, October 19-22, 2005 Nagoya, Japan, pp. 257-262.
[27]  C.T. Kwok, S.L. Fong, F.T. Cheng & H.C. Man, "Investigation of Galvanic Corrosion in Laser-Welded Stainless Steel Sheets", 5th International Symposium on Laser Precision Microfabrication (LPM2004), Proceedings of SPIE, May 11-14, 2004, Nara, Japan, pp. 325-330.
[28]  W.H. Ding & C.T. Kwok, "Passivation of 316L Stainless Steel for Biomedical Applications", Proceedings of Symposium on Applied Science & Technology in Macau 2004, Nov. 27 2004, Macau, pp. 72-78.
[29]  S.F. Wong, C.T. Kwok & K.H. Lo, "Shrinking Knowledge Gap by Virtual Training Approach", 33rd International Conference on Computer & Industrial Engineering, March 25-27, 2004, Jeju, Korea, CD-ROM.
[30]  C.T. Kwok, F.T. Cheng & H.C. Man, "Potential Impact of Sulfide on the Corrosivity of Polluted Sea Water in Macau", 4th International Conference on Marine and Pollution Ecotoxicology (ICMPE), June 1-5, 2004, Hong Kong, (Poster Presentation).
[31]  C.T. Kwok, F.T. Cheng & H.C. Man, "Enhancement in Corrosion Resistance of Laser-Melted Stainless Steel by Passivation Treatment", Proceedings of the International Conference on Leading Edge Manufacturing in 21st Century (LEM21), Nov 3-6 2003, Niigata, Japan, pp. 927-932.
[32]  S.L. Fong, C.T. Kwok, "Penetration Welding of Stainless Steels by High Power Nd:YAG Laser", Proceedings of Symposium on Technological Innovations in Macau 2002, Dec. 14 2002, Macau, pp. 28-35.
[33]  H.C. Man, K.H. Lo, F.T. Cheng & C.T. Kwok, "Cavitation Erosion and Corrosion Behaviors of Stainless Steel 316 Laser Surface Alloyed with WC", Proceedings of the 21th. Int. Congress on Application of Lasers & Electro-optics (ICALEO '02), Arizona, USA, (2002), CD-ROM.
[34]  C.T. Kwok, F.T. Cheng & H.C. Man, "Laser Surface Aluminizing of Mild Steel: Microstructural & Corrosion Characteristics", Proceedings of the 21th. Int. Congress on Application of Lasers & Electro-optics (ICALEO '02), Arizona, USA, (2002), CD-ROM.
[35]  K.I. Leong, C.T. Kwok, F.T. Cheng & H.C. Man, "Optimization of Corrosion Resistance of Laser Melted Plastics Mold Steels in Acidic Media by Automated Nd:YAG Laser", Process Control Science Technology and Applications, Proceedings of 13th. Chinese Process Control Conference, Jul. 29-Aug. 2, 2002, Macau & Zhuhai, pp. 133-137.
[36]  C.T. Kwok, K.H. Lo, F.T. Cheng & H.C. Man, "Laser Surface Melting of Martensitic Stainless Steel 440C for Enhancing Corrosion Resistance", First International Symposium on High-Power Laser Macroprocessing (LAMP2002), Proceedings of SPIE, Vol. 4831, May 27-31, 2002, Osaka, Japan, pp. 493-498.
[37]  K.I. Leong, C.T. Kwok, F.T. Cheng & H.C. Man, "Laser Surface Melting of Plastic Mould Steels by Automated Nd:YAG Laser System", Proc. Automation Science and Technology, pp. 122-127, Dec. 13-18, 2001, Macau.
[38]  K.H. Lo, C.T. Kwok, F.T. Cheng & H.C. Man, "Corrosion Resistance of Laser-fabricated Metal-matrix Composite Layer on Stainless Steel 316L", Proceedings of the 20th. Int. Congress on Application of Lasers & Electro-optics (ICALEO '01), Florida, USA, (2001), CD-ROM.
[39]  C.T. Kwok, F.T. Cheng & H.C. Man, "Laser Hardfacing of 1050 Mild Steel Using NiCoCrB for Enhancing Cavitation Erosion-corrosion Resistance", Proceedings of the 20th. Int. Congress on Application of Lasers & Electro-optics (ICALEO '01), Florida, USA, (2001), CD-ROM.
[40]  H.C. Man, C.T. Kwok, F.T. Cheng & J. Ding, "Laser Surface Alloying of AISI 1050 Mild Steel for Cavitation Erosion Resistance Using NiCrSiB", Proceedings of the 19th. Int. Congress on Application of Lasers & Electro-optics (ICALEO '00), Detroit, USA, pp. 141-150 (2000).
[41]  H.C. Man, C.T. Kwok & T.M. Yue, "Laser Surface Cladding of SiC/Si3N4 on AA6061 Aluminum alloy", Proceedings of the 18th. Int. Congress on Application of Lasers & Electro-optics (ICALEO '99), San Diego, USA, pp. 216-224 (1999).
[42]  C.T. Kwok, F.T. Cheng & H.C. Man, "Cavitation Erosion and Corrosion Behaviour of Laser Surface Melted 316L Stainless Steel", Proceedings of the 16th. Int. Congress on Application of Lasers & Electro-optics (ICALEO '97), San Diego, USA, pp. 98-107 (1997).
[43]  H.C. Man, C.T. Kwok & F.T. Cheng, "Cavitation Erosion-Corrosion Behavior of Various Engineering Alloys in 3.5% NaCl Solutions", Proceedings of the International Symposium on Ship-Building & Ship-Repairing (ISSS '97), GuangZhou, China, pp. 81-92 (1997).
[44]  C.T. Kwok, H.C. Man & L.K. Leung, "Effect of Temperature and pH on Cavitation Erosion of Super Duplex Stainless Steel", The NACE International Annual Conference and Exposition (Corrosion '96), Denver, USA, Paper no. 514. (1996).

Publications: Books/Book Chapters

[1]  C.T. Kwok (Editor), Laser Surface Modification of Alloys for Erosion and Corrosion Resistance', Woodhead Publishing, ISBN 13: 9780857090157 ISBN 10: 0857090151 (to be published in 2012) with three contributed chapters:C.T. Kwok, Introduction, W.K. Chan, C.T. Kwok, K.H. Lo, Chapter 3. Laser surface melting of stainless steels for mitigating intergranular corrosion, P.K. Wong, C.T. Kwok, H.C. Man, F.T. Cheng, Chapter 11. Laser Surface Alloying of Copper for Electrical Erosion and Corrosion Resistance