Effect of tool rotational speed on the microstructures and tensile properties of 7075 aluminum alloy via Friction Stir Process (FSP)

Ming Hsiang Ku, Fei-Yi Hung, Truan-Sheng Lui, Li Hui Chen

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

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.

Original languageEnglish
Title of host publicationLight Metals 2012 - Proceedings of the Technical Sessions Presented by the TMS Aluminum Committee at the TMS 2012 Annual Meeting and Exhibition
Pages475-480
Number of pages6
Publication statusPublished - 2012 May 16
EventLight Metals 2012 - TMS 2012 Annual Meeting and Exhibition - Orlando, FL, United States
Duration: 2012 Mar 112012 Mar 15

Publication series

NameTMS Light Metals
ISSN (Print)0147-0809

Other

OtherLight Metals 2012 - TMS 2012 Annual Meeting and Exhibition
CountryUnited States
CityOrlando, FL
Period12-03-1112-03-15

All Science Journal Classification (ASJC) codes

  • Condensed Matter Physics
  • Metals and Alloys
  • Materials Chemistry

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