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Small angle x-ray scattering study of precipitation in Al-Zn-Mg-Cu alloys

Du Zhi-Wei Zhou Tie-Tao Feng Lin-Ping Chen Chang-Qi Zhao Hui Dong Bao-Zhong

Small angle x-ray scattering study of precipitation in Al-Zn-Mg-Cu alloys

Du Zhi-Wei, Zhou Tie-Tao, Feng Lin-Ping, Chen Chang-Qi, Zhao Hui, Dong Bao-Zhong
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  • Received Date:  19 December 2003
  • Accepted Date:  09 February 2004
  • Published Online:  05 May 2004

Small angle x-ray scattering study of precipitation in Al-Zn-Mg-Cu alloys

  • 1. (1)北京航空航天大学材料科学和工程学院,北京 100083; (2)中国科学院高能物理研究所同步辐射实验室,北京 100039

Abstract: The evolution of microstructural parameters (mean size and volume fracti on) of precipitates in three types of Al_Zn_Mg_Cu alloys during ageing has been studied by synchrotron_radiation small angle x_ray scattering (SAXS). The influe nce of Zn content on the precipitation has been analyzed. The results show that the precipitates are in nanometer scale for the three types alloys (A, B, C) . Th e maxima of the precipitate volume fractions forA, Band Cincrease wi th Zn content and are about 0.023—0.028, 0.052—0.054 and 0.04 respectively The evolution of volume fra ction at a certain temperature is consistent with the kinetic process of precipi tate nucleation, growth and Ostwald ripening.

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