Effect of Deep Cryogenic Treatment on Aging Processes of Al–Mg–Si Alloy
- Authors: Yuanchun Huang 1, Li Y.2, Ren X.1, Xiao Z.3
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Affiliations:
- Research Institute of Light Alloy, Central South University
- School of Materials Science and Engineering, Central South University
- State Key Laboratory of High Performance Complex Manufacturing, Central South University
- Issue: Vol 120, No 9 (2019)
- Pages: 914-918
- Section: Strength and Plasticity
- URL: https://journals.rcsi.science/0031-918X/article/view/168722
- DOI: https://doi.org/10.1134/S0031918X19070111
- ID: 168722
Cite item
Abstract
Abstract—This study investigated the effect of deep cryogenic treatment (DCT) on the aging processes of Al–0.43Mg–1.27Si alloy. Differences in the mechanical properties and precipitation behavior between conventional treatment and DCT were analyzed by means of hardness test, tensile test, optical microscopy (OM), scanning electron microscopy (SEM), differential scanning calorimetry (DSC), and transmission electron microscopy (TEM). DCT promoted the precipitation of Si phases, which is accompanied by an increase in hardness. The content of Si was improved from 0.84 to 1.08% and the hardness was increased from 46.11 to 48.89 HV. The temperature of precipitation of GP zones and β'' phase was lower, which accelerated precipitation of the β'' phase and then improved the aging hardening response of the alloy.
About the authors
Yuanchun Huang
Research Institute of Light Alloy, Central South University
Author for correspondence.
Email: science@csu.edu.cn
China, Changsha, 410083
Ying Li
School of Materials Science and Engineering, Central South University
Email: science@csu.edu.cn
China, Changsha, 410083
Xianwei Ren
Research Institute of Light Alloy, Central South University
Email: science@csu.edu.cn
China, Changsha, 410083
Zhengbing Xiao
State Key Laboratory of High Performance Complex Manufacturing, Central South University
Email: science@csu.edu.cn
China, Changsha, 410083