Effect of heat treatment on microstructure and properties of 6016 aluminum alloy

doi:10.13251/j.issn.0254-6051.2023.12.020

Abstract

Abstract: Natural aging effect of 6016 aluminum during parking process under room temperature was investigated. The mechanical properties under different heat treatments were tested, the microstructure was characterized by using OM, SEM and TEM. The results indicate that the 1.6 mm thickess plate material under pre-aging at 80 ℃ and 100 ℃ has better aging stability compared to the plates un-pre-aged and pre-aged at 60 ℃. The pre-β″ phase precipitates after pre-aging treatment and becomes nucleation of β″ phase, which is semi-coherent with the matrix, and the PFZ zone is formed near the grain boundaries. With the increase of pre-aging temperature, the strength of artificial aging treatment is increased and the yield strength has an increment of 40-80 MPa. The best comprehensive properties are achieved under pre-aging at 80 ℃ for 4 h and are stable with 150 days, which has the highest strength increment.

Key words: 6016 aluminum, microstructure, pre-aging treatment, mechanical properties

CLC Number:

TG156.1

Bai Xingliang. Effect of heat treatment on microstructure and properties of 6016 aluminum alloy[J]. Heat Treatment of Metals, 2023, 48(12): 123-128.

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