Surface Texturing to Control Friction Presenter Jyhwen Wang

Surface Texturing to Control Friction Presenter: Jyhwen Wang, TAMU PIs: Jyhwen Wang, Chao Ma, Hong Liang, TAMU Jian Cao, Jane Wang, Yip-Wah Chung, Northwestern

8. Surface Texturing to Control Friction Industrial Need and Relevance: Metal deformation is strongly influenced by contact friction between workpiece and tooling surfaces. Surface texturing can be an effective means of controlling friction. http: //www. industrialheating. com/ (2015) NSF I/UCRC Planning Meeting Slide 2

8. Surface Texturing to Control Friction Project Objectives: • To develop laser surface texturing techniques to generate composite textures on tooling surface; and • To understand their tribological effects during metal forming. Negative Feature (~10 to 100 mm) J. Phys. D: Appl. Phys. 47 (2014) Positive Feature (~500 mm to 1 mm) NSF I/UCRC Planning Meeting Slide 3

8. Surface Texturing to Control Friction Punch displ. : 18 mm (onset of 1 st rupture) Approach/Methodologies: Fiber Laser Track spacing Scan Head PC DC Power Supply J. Manuf. Sci. E. 138 121001 (2016) NSF I/UCRC Planning Meeting Pure Ni before laser melting Ni/Al 2 O 3 before laser melting Thermocapillary flow fully developed Thermocapillary flow slightly initiated Pure Ni after laser melting at 0. 18 m. J Ni/Al 2 O 3 after laser melting at 0. 18 m. J Slide 4

8. Surface Texturing to Control Friction Approach/Methodologies: Meng, F. , Zhou, R. , Davis, T. , Cao, J. , Wang, Q. , Hua, D. , Liu, J. , (2010) “Study on Effect of Dimples on Friction of Parallel Surfaces Under Different Sliding Conditions”, Applied Surface Science, 256, no. 9: 2863 -2875 Punch displ. : 18 mm Steel-to-Steel contact (onset of 1 st rupture) Slide 5

8. Surface Texturing to Control Friction Approach/Methodologies: Texturing Capabilities at Northwestern Slide 6

8. Surface Texturing to Control Friction Deliverables: • Knowledge required to develop advanced surface texture • Effects of designed surface textures on friction • Performance of the designed surface textures in sheet metal forming processes NSF I/UCRC Planning Meeting Slide 7

8. Surface Texturing to Control Friction Budget and Timeline: Estimated cost of the project is $300 K. Task / Milestone Q 1 Design Surface Texture Develop Laser Texturing Techniques Conduct Friction Tests Forming Experiments NSF I/UCRC Planning Meeting Year 1 Q 2 Q 3 Q 4 Year 2 Q 3 Q 1 Q 4 Slide 8

8. Surface Texturing to Control Friction Discussion: – Are the industrial need and relevance accurately captured? – Are the objectives realistic and complete? – Are the approaches technically sound appropriate? – Are there alternative implementation paths or better approaches? – Are the deliverables impactful to industrial partners? – Are the budget and timeline reasonable? – Are there conflicts with intellectual property or trade secrets? – List additional project specific questions are appropriate. NSF I/UCRC Planning Meeting Slide 9