Visualization of Contact-Pressure Distribution between Material and Backing Plate in Friction Stir Processing

Abstract:

In this study, the authors evaluated pressure distribution on a backing plate in friction-stir processing (FSP) utilizing an embedded pressure pin connected to a load sensor. They conducted FSP on aluminum alloy plates repeatedly offsetting the path-lines from the center of the pin and recorded change of forming pressure with tool position, which was compiled from the bearing load of the pin. The authors mapped the results to visualize the two-dimensional contact pressure distribution on a backing plate during FSP. They then compared the height distribution of the wall fabricated by friction-stir forming (FSF) utilizing a die having a groove with the observed distribution of pressure. Consequently, maximum pressure was observed beneath the rim of the tool probe at the retreating side (RS), and the highest points of the wall were observed at the RS.

• Periodical: Key Engineering Materials (Volume 765)
• Pages: 199-203
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.765.199
• Online since: March 2018
• Authors: Takahiro Ohashi*, Xin Tong, Zi Jie Zhao, Hamed Mofidi Tabatabaei, Tadashi Nishihara
• Keywords: Friction Stir Processing (FSP), In-Process Sensing, Pressure Distribution, Visualization

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