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Water Cooling Effects on the Microstructural Evolution and Mechanical Properties of Friction-Stir-Processed Al-6061 Alloy

Journal Article


Abstract


  • Water cooling was applied during friction stir processing (FSP) of an Al-6061 alloy, and it was found that the strengthening efficiency induced by water cooling was varied, which was dependent on the initial base metal temper. As to the natural-aged Al-6061 alloy (6061-NA), the stir zone (SZ) was strengthened significantly by water cooling. Compared with the air-cooled FSP sample, the relatively high strength of the water-cooled FSP sample mainly arose from grain refinement, increased density of dislocations and large amounts of fine re-precipitated Guinier–Preston zones in the SZ. On the contrary, as to the annealed Al-6061 alloy (6061-O), the difference in the microstructural evolution between the FSP samples with and without water cooling was nonsignificant, where only finer grain morphology was observed in the water-cooled SZ, and thus the strengthening effects caused by water cooling became less.

Authors


  •   Chen, Yu (external author)
  •   Jiang, Yifu (external author)
  •   Zhang, Fenghe (external author)
  •   Ding, Hua (external author)
  •   Zhao, Jingwei
  •   Ren, Zhaohui (external author)

Publication Date


  • 2018

Citation


  • Chen, Y., Jiang, Y., Zhang, F., Ding, H., Zhao, J. & Ren, Z. (2018). Water Cooling Effects on the Microstructural Evolution and Mechanical Properties of Friction-Stir-Processed Al-6061 Alloy. Transactions of the Indian Institute of Metals, 71 (12), 3077-3087.

Scopus Eid


  • 2-s2.0-85056624493

Number Of Pages


  • 10

Start Page


  • 3077

End Page


  • 3087

Volume


  • 71

Issue


  • 12

Place Of Publication


  • Switzerland

Abstract


  • Water cooling was applied during friction stir processing (FSP) of an Al-6061 alloy, and it was found that the strengthening efficiency induced by water cooling was varied, which was dependent on the initial base metal temper. As to the natural-aged Al-6061 alloy (6061-NA), the stir zone (SZ) was strengthened significantly by water cooling. Compared with the air-cooled FSP sample, the relatively high strength of the water-cooled FSP sample mainly arose from grain refinement, increased density of dislocations and large amounts of fine re-precipitated Guinier–Preston zones in the SZ. On the contrary, as to the annealed Al-6061 alloy (6061-O), the difference in the microstructural evolution between the FSP samples with and without water cooling was nonsignificant, where only finer grain morphology was observed in the water-cooled SZ, and thus the strengthening effects caused by water cooling became less.

Authors


  •   Chen, Yu (external author)
  •   Jiang, Yifu (external author)
  •   Zhang, Fenghe (external author)
  •   Ding, Hua (external author)
  •   Zhao, Jingwei
  •   Ren, Zhaohui (external author)

Publication Date


  • 2018

Citation


  • Chen, Y., Jiang, Y., Zhang, F., Ding, H., Zhao, J. & Ren, Z. (2018). Water Cooling Effects on the Microstructural Evolution and Mechanical Properties of Friction-Stir-Processed Al-6061 Alloy. Transactions of the Indian Institute of Metals, 71 (12), 3077-3087.

Scopus Eid


  • 2-s2.0-85056624493

Number Of Pages


  • 10

Start Page


  • 3077

End Page


  • 3087

Volume


  • 71

Issue


  • 12

Place Of Publication


  • Switzerland