Effect of pre-aging treatment on mechanical properties and precipitation of 6016 alloy

LI Yinga; HUANG Yuanchunb; REN Xianweib; WANG Yejunb

doi:10.13264/j.cnki.ysjskx.2018.04.007

Volume 9 Issue 4

Aug. 2018

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Nonferrous Metals Science and Engineering > 2018 > 9(4): 40-46, 101. > DOI: 10.13264/j.cnki.ysjskx.2018.04.007

LI Yinga, HUANG Yuanchunb, REN Xianweib, WANG Yejunb. Effect of pre-aging treatment on mechanical properties and precipitation of 6016 alloy[J]. Nonferrous Metals Science and Engineering, 2018, 9(4): 40-46, 101. DOI: 10.13264/j.cnki.ysjskx.2018.04.007

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Effect of pre-aging treatment on mechanical properties and precipitation of 6016 alloy

a.
School of Materials Science and Engineering, Central South University, Changsha 410083, China
b.
Light Alloys Research Institute, Central South University, Changsha 410083, China

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Received Date: May 15, 2018
Published Date: August 30, 2018

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Abstract

Abstract

The effects of pre-aging treatment on the mechanical properties and the precipitation behavior of 6016 alloy were studied by means of first-principles calculations, hardness tests, tensile tests, X-ray diffraction (XRD) and transmission electron microscopy (TEM). Studies show that pre-aging treatment can inhibit the negative effects of natural aging. What′s more, pre-aging treatment of 110 ℃ × 10 min can significantly inhibit the natural aging and maintained good formability (σ_0.2: 109.65 MPa) of sheet; Pre-aging can improve paint baking response and pre-aging treatment of 110 ℃ × 10 min showed the best paint bake performance (σ_0.2: 212.29 MPa). But paint baking response decreased with the increase of pre-aging time and temperature; Different pre-aging treatment didn′t change the composition of the phases in the matrix which mainly were α-Al and Mg₂Si.In addition, the Mg₂Si phase increased slightly with the increase of time and temperature; More needle-like β" phases precipitated and the mechanical properties were better after paint baking treatment with the pre-aged treatment sample, which was in accordance with the physicochemical properties of the β sequence calculated by the first-principle calculation.
- 6016 aluminum alloy,
- pre-aging,
- first principle of calculation,
- mechanical properties,
- microstructure

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