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Annual Stephen Malkin Lecture: Abrasive Machining of Aerospace Alloys – Challenges and Recent Advancements

Date/Time: 

Tuesday, October 25, 2016 - 9:30am

Presenter: 

Dr. Changsheng Guo, United Technologies Research Center

Location: 

Gunness Student Center, Marcus Hall

Details: 

Abstract:
Jet engine components such as blades, vanes, disks, cases, and Integrated-Bladed Rotors (IBR) or blisks made of nickel and titanium alloys usually have geometrically complex shapes and features with tight tolerances and very stringent surface integrity specifications. Furthermore, a large amount of stock removal is often required when making these parts because the significant differences between the forged blanks and the finished components. Grinding (or machining with abrasive tools) is still the main manufacturing process in finish machining these nickel and titanium components to achieve the stringent surface integrity. Due to the superior hot-hardness/strength of aerospace alloys, complex geometry, tight tolerances, stringent surface integrity and metallurgical requirements, significant challenges exist to develop robust production grinding processes to achieve high production rate for these components. Higher grinding forces, higher specific energy, higher tendency for thermal damages such as grinding burn and White Etch Layer are some of the characteristics of aerospace alloy grinding. This seminar will presents an overview of challenges of aerospace alloy grinding and recent technological advancements in aerospace alloy grinding such as thermal modeling, process modeling, model-based simulation, optimization, and control of continuous dress creep-feed grinding, multi-axis grinding with plated CBN wheels.

 

Bio:
Dr. Changsheng Guo is a Principal Scientist and Project Leader with the United Technologies Research Center (UTRC) where he leads projects in modeling, simulation, and optimization of manufacturing processes. Changsheng received his Ph.D. in mechanical engineering and MBA from University of Massachusetts, a Master's degree in manufacturing engineering Northeastern University in China.  Before joining UTRC, Changsheng was a research Fellow at the University of Massachusetts, the Technical Director of a ceramic machining company, and an assistant professor at Northeastern University in Shenyang, China.

Dr. Guo’s research focus has been on the fundamentals and applications of grinding and machining. He has more than 80 published papers, co-authored one book, and 15 patents. Changsheng is a member of the CIRP (International Academy for Production Engineering), a Fellow of SME, an associate editor for the Journal of Machining Science and Technology.  Changsheng received numerous awards such as the prestigious F. W. Taylor Medal of CIRP and the ASME Blackall Award.

 

Schedule:

  • Welcome
  • Keynote Speaker Dr. Changshang Guo
  • Catered luncheon
  • Roundtable discussion

 

For additional information please contact Heather Caldwell Urquhart in the Department of Mechanical and Industrial Engineering at (413) 545-2505 or hbcaldwell@umass.edu.