@inproceedings{715e6fca1b644ee7b110ea7ddafc317f,
title = "Effect of rotation speed on microstructure evolution during underwater friction stir processing Al-Cu alloys",
abstract = "The effect of tool rotation speed on microstructure evolution in 2219-T6 Al alloys, during underwater friction stir processing, was investigated. Different samples were prepared by employing tool rotation speeds ranging from 600 rpm to 1000 rpm at a constant traverse speed of 200 mm/min. The processed samples were examined by transmission electron microscope (TEM). A recrystallized microstructure was observed in the stirred zone. The average grain size of the stirred zone was reduced over an order of magnitude compared to the base metal. The meta-stable precipitates in the base metal transformed into equilibrium precipitates. Microhardness maps were measured on the polished cross-section of as-processed samples. The Vickers hardness in the stirred zone is lower than that in the unprocessed base metal, and decreased with increasing rotation speed. The above microstructure evolution was rationalized based on the competition between grain boundary and precipitation strengthening. Thermal profiles were obtained using commercial software FSWS as a function of processing conditions. These profiles were used to rationalize the microstructure evolution during friction stir processing.",
keywords = "Al-Cu alloy, Friction stir processing, Microhardness, Microstructure, Rotation speed",
author = "Feng, \{X. L.\} and Liu, \{H. J.\} and Babu, \{S. S.\} and A. Chaudhary and M. Keller",
year = "2013",
language = "英语",
isbn = "9781627089982",
series = "ASM Proceedings of the International Conference: Trends in Welding Research",
pages = "397--400",
booktitle = "Trends in Welding Research - Proceedings of the 9th International Conference",
note = "9th International Conference on Trends in Welding Research ; Conference date: 04-06-2012 Through 08-06-2012",
}