Peak stir zone temperatures during Friction Stir Processing
Zhilyaev, Alexander P.
Fuller, Christian B.
Mahoney, Murray W.
McNelley, Terry R.
MetadataShow full item record
The stir zone (SZ) temperature cycle was measured during the friction stir processing (FSP) of NiAl bronze plates. The FSP was conducted using a tool design with a smooth concave shoulder and a 12.7-mm step-spiral pin. Temperature sensing was accomplished using sheathed ther- mocouples embedded in the tool path within the plates, while simultaneous optical pyrometry measurements of surface temperatures were also obtained. Peak SZ temperatures were 990 !C to 1015 !C (0.90 to 0.97 TMelt) and were not aﬀected by preheating to 400 !C, although the dwell time above 900 !C was increased by the preheating. Thermocouple data suggested little varia- tion in peak temperature across the SZ, although thermocouples initially located on the advancing sides and at the centerlines of the tool traverses were displaced to the retreating sides, precluding direct assessment of the temperature variation across the SZ. Microstructure-based estimates of local peak SZ temperatures have been made on these and on other similarly processed materials. Altogether, the peak-temperature determinations from these diﬀerent measurement techniques are in close agreement.
The article of record as published may be found at http://dx.doi.org/10.1007/s11661-009-0140-7
RightsThis publication is a work of the U.S. Government as defined in Title 17, United States Code, Section 101. Copyright protection is not available for this work in the United States.
Showing items related by title, author, creator and subject.
Chen, Yuchun; Chu, Peter C.; Wang, Guihua (2002);The autocorrelation functions of temperature and salinity in the three basins (Ulleung, Japan, and Yamato Basins) of the Japan/East Sea are computed using the U.S. Navy’s Master Oceanographic Observational Dataset for ...
Kempf, Cecil J.; Wosser, Joseph L. (Cambridge, Massachusetts. Massachusetts Institute of Technology, 1957-06);An experimental study is made of the temperature of a hot surface required to ignite ethanol-air mixtures of different fuel-air ratios in steady flow. The mixture at a controlled free-stream velocity, density and temperature ...
Overland, James E.; Guest, Peter S. (1991);Arctic cooling through the fall‐winter transition is calculated from a coupled atmosphere‐sea ice thermal model and compared to temperature soundings and surface measurements made north of Svalbard during the Coordinated ...