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Small angle x-ray scattering study on microstructure and mechanical property evo lutions of equal-channel angular pressed 7050 Al alloy

Zheng Li-Jing Li Shu-Suo Li Huan-Xi Chen Chang-Qi Han Ya-Fang Dong Bao-Zhong

Small angle x-ray scattering study on microstructure and mechanical property evo lutions of equal-channel angular pressed 7050 Al alloy

Zheng Li-Jing, Li Shu-Suo, Li Huan-Xi, Chen Chang-Qi, Han Ya-Fang, Dong Bao-Zhong
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  • Received Date:  15 September 2004
  • Accepted Date:  08 December 2004
  • Published Online:  19 April 2005

Small angle x-ray scattering study on microstructure and mechanical property evo lutions of equal-channel angular pressed 7050 Al alloy

  • 1. (1)北京航空航天大学材料科学与工程学院,北京 100083; (2)中国科学院高能物理研究所,北京 100039

Abstract: Three processes which combined equal_channel angular pressing (ECAP) with heat t reatment were applied to fabricate super_high strength fine 7050 Al alloy. Varia tions of microstructure parameters of precipitates in 7050 Al alloys were analyz ed by using small angle x_ray scattering technique. The variations of mechanical properties and mechanism of strengthening in 7050 Al alloys were explained in the paper. Experiments discovered that “pre_ECAP solid solution treatment and post_ECAP aging treatment" was a proper process, with which the ultimate tensile strength was increased to 677MPa, and elongation to failure was improved to b e 15% or so.

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