Effect of Different Aging System on Microstructure and Mechanical Properties of X2A66 Alloy

Abstract:

Through a series of mechanical properties tests and microstructure observation, the effects of artificial heat treatment (AA), pre-stretching aging (PA) and pre-stretching creep aging (PCA) treatment on the precipitation phase type and mechanical properties of X2A66 aluminum-lithium alloy were studied. The results show that compared with AA, PA treatment promotes the uniform precipitation of high-density T₁ phase, so that the yield strength, tensile strength and elongation of the alloy reach 593.4Mpa, 610.8Mpa, 10.7%. Further, the creep aging treatment on the basis of the pre-deformation can further increase the strength (613.6Mpa, 628.9Mpa) of the alloy with a slight decrease in the elongation (10.3%).

• Periodical: Key Engineering Materials (Volume 814)
• Pages: 262-267
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.814.262
• Online since: July 2019
• Authors: Jin Jun Xu, Rui Chun Guan, Mang Jiang*
• Keywords: Aging Treatment, Mechanical Properties, Microstructure, Pre-Stretching, X2A66

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