TY - GEN
T1 - Effect of tool rotational speed on the microstructures and tensile properties of 7075 aluminum alloy via Friction Stir Process (FSP)
AU - Ku, Ming Hsiang
AU - Hung, Fei-Yi
AU - Lui, Truan-Sheng
AU - Chen, Li Hui
PY - 2012/5/16
Y1 - 2012/5/16
N2 - 7075-T6 aluminum alloy plates were subject to FSP with various tool rotational speeds (1230, 1450 and 1670 rpm) followed by different heat treatments (natural aging and T4T6 treatments). The influences of tool rotational speeds and aging treatments on the microstructures and tensile properties were discussed. The experimental results showed that the tensile strength of FSPed specimens with various tool rotational speeds were close. After aging treatments, higher tool rotational speeds (1670 rpm) had an embrittlement phenomenon on the SZ due to the contribution of low element bands (LEBs) and precipitates. EPMA analysis showed that the LEBs are low element distributions, such as Zn, Mg, Cu. Decreasing the tool rotational speeds, the LEBs were not obvious and restrained the brittle behavior to improve the ductility. Compared with natural aging, after T4T6 treatments, the tensile strength of FSP specimens with all tool rotational speeds was improved obviously.
AB - 7075-T6 aluminum alloy plates were subject to FSP with various tool rotational speeds (1230, 1450 and 1670 rpm) followed by different heat treatments (natural aging and T4T6 treatments). The influences of tool rotational speeds and aging treatments on the microstructures and tensile properties were discussed. The experimental results showed that the tensile strength of FSPed specimens with various tool rotational speeds were close. After aging treatments, higher tool rotational speeds (1670 rpm) had an embrittlement phenomenon on the SZ due to the contribution of low element bands (LEBs) and precipitates. EPMA analysis showed that the LEBs are low element distributions, such as Zn, Mg, Cu. Decreasing the tool rotational speeds, the LEBs were not obvious and restrained the brittle behavior to improve the ductility. Compared with natural aging, after T4T6 treatments, the tensile strength of FSP specimens with all tool rotational speeds was improved obviously.
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M3 - Conference contribution
AN - SCOPUS:84860871323
SN - 9781118291399
T3 - TMS Light Metals
SP - 475
EP - 480
BT - Light Metals 2012 - Proceedings of the Technical Sessions Presented by the TMS Aluminum Committee at the TMS 2012 Annual Meeting and Exhibition
T2 - Light Metals 2012 - TMS 2012 Annual Meeting and Exhibition
Y2 - 11 March 2012 through 15 March 2012
ER -